VW 50065
Group standard
Issue 2013-07 Class. No.:
51251
Descriptors:
steel, strip, sheet metal, flat product, body, cold-rolled, hot-rolled, steel for deep drawing, soft steel, high-strength steel, multiphase steel, zinc-coated, hot-dip galvanized, electrolytically zinc-coated, global, VDA 239-100
Flat Products Made of Steel for Cold Working Material Requirements Preface For new designs, global standard VW 50065 for sheet steel must be used for sheet steel in agree‐ ment with the appropriate departments. This version of the standard is based on VDA Material Sheet 239-100 "Sheet Steel for Cold Form‐ ing". Deviations of this standard from VDA 239-100 and the correspondence of codes between standards are listed in appendix B. The DIN EN and Volkswagen standards (VW and TL) used for flat steel products up to now still apply. Contents 1 2 3 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14
Page
Scope ......................................................................................................................... 2 Symbols and abbreviations ........................................................................................ 2 Material types and definitions ..................................................................................... 3 Soft steels .................................................................................................................. 3 Low-alloy and micro-alloyed steels (LA or HSLA) ...................................................... 3 Fine-grained steels (MC) ............................................................................................ 3 High-strength IF steels (IF) ........................................................................................ 3 Bake-hardening steels (BH) ....................................................................................... 3 Phosphorus-alloy steels (P) ....................................................................................... 4 Dual-phase steels (DP) .............................................................................................. 4 TRIP steels ................................................................................................................. 4 Complex-phase steels (CP) ....................................................................................... 4 Ferritic-bainitic steels (FB) ......................................................................................... 4 Martensitic steels (MS) ............................................................................................... 4 Electrolytic galvanization (EG) ................................................................................... 4 Hot-dip zinc coating (hot-dip galvanizing, GI) ............................................................ 5 Hot-dip zinc-iron alloy coating (galvannealed, GA) .................................................... 5
Always use the latest version of this standard. This electronically generated standard is authentic and valid without signature. The English translation is believed to be accurate. In case of discrepancies, the German version is alone authoritative and controlling. Numerical notation acc. to ISO/IEC Directives, Part 2.
Technical responsibility GQL-M/1
Dr. Carsten Lachmann
GQL-M
Dr. Frank Roeper
Page 1 of 34
The Standards department Tel.: +49 5361 9-33994
EKDV/4 Ute Hager-Süß
EKDV
Tel.: +49 5361 9-49035
Manfred Terlinden
All rights reserved. No part of this document may be provided to third parties or reproduced without the prior consent of one of the Volkswagen Group’s Standards departments.
© Volkswagen Aktiengesellschaft
VWNORM-2012-05q
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3.15 3.16 4 4.1 4.2 4.3 4.4 5 5.1 5.2 5.3 5.4 5.5 5.6 5.7 5.8 5.9 6 6.1 6.2 6.3 7 8 9 Appendix A A.1 Appendix B B.1 B.2 Appendix C C.1 1
Hot-dip aluminum-silicon coating (AS) ....................................................................... 5 Hot-dip zinc-magnesium coating (ZM) ....................................................................... 5 Description ................................................................................................................. 5 Soft steels .................................................................................................................. 5 High-strength steels ................................................................................................... 6 Multiphase steels ....................................................................................................... 6 Coating and surface type ........................................................................................... 7 Requirements ............................................................................................................. 8 Basic and additional requirements ............................................................................. 8 Steelmaking method and deoxidation type of the steel .............................................. 8 Delivery ...................................................................................................................... 8 Limit deviations and form tolerances .......................................................................... 8 Chemical composition ................................................................................................ 8 Mechanical properties ................................................................................................ 8 Microstructure ............................................................................................................ 9 Coatings ................................................................................................................... 10 Surface ..................................................................................................................... 11 Processing instructions for joining multiphase steels (AHSS) .................................. 12 Welding .................................................................................................................... 12 MIG and laser brazing .............................................................................................. 12 Bonding .................................................................................................................... 13 Test certificates ........................................................................................................ 13 Marking, packaging, and storage life ....................................................................... 13 Applicable documents .............................................................................................. 13 .................................................................................................................................. 15 Tables ...................................................................................................................... 15 .................................................................................................................................. 26 Deviations from VDA Material Sheet 239-100 ......................................................... 26 Correspondence of codes between standards (informative) .................................... 26 .................................................................................................................................. 34 Description examples ............................................................................................... 34
Scope
This standard describes the requirements for uncoated and continuously coated, surface-treated, cold-rolled and hot-rolled flat products made of steel up to a thickness of 6,5 mm. Typical applica‐ tions are cold-worked sheet-steel components. 2 (HS)LA A A50 mm A80 mm AHSS Ag BH2 HSS IF
Symbols and abbreviations "High-Strength Low-Alloy", high-strength low-alloy or micro-alloyed steel with defined minimum yield point Elongation at break for a proportional specimen with L0 = 5,65 √So Elongation at break for a specimen with gage length L0 = 50 mm Elongation at break for a specimen with gage length L0 = 80 mm "Advanced High Strength Steel", multiphase steels Plastic extensometer elongation at maximum force Bake hardening value after 2% plastic prestrain "High-Strength Steel" with defined minimum yield point "Interstitial-free" steel
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MC RPc Ra ReL Rm Rp0,2 n10 – 20/Ag
Fine-grained steels Number of peaks Arithmetic average roughness Lower yield point Tensile strength Proof stress at 0,2% plastic elongation Tensile-strain-hardening exponent, determined between 10% and 20% plastic elongation or Ag for Ag <20% Normal anisotropy in the longitudinal direction at 20% plastic elongation Normal anisotropy in the transverse direction at 20% plastic elongation Mean normal anisotropy at 20% plastic elongation, rm/20 = (r0/20 + r90/20 + 2 × r45/20) / 4 Sheet thickness
r0/20 r90/20 rm/20 t 3
Material types and definitions
3.1
Soft steels
Because of their low yield point and high elongation at break, soft steels for deep drawing are es‐ pecially suited for producing complex components. These steel grades are produced as non-IF or IF steels with aluminum killing. Soft IF steels have even better formability and extremely low car‐ bon and nitrogen content and are stabilized by the addition of titanium and/or niobium. 3.2
Low-alloy and micro-alloyed steels (LA or HSLA)
Micro-alloyed steels achieve their high strength due to alloying with niobium, titanium, and vanadi‐ um. These alloying elements can be added individually or in combination. Alternatively, carbon manganese systems can be used in combination with grain refinement. 3.3
Fine-grained steels (MC)
The fine microstructure of these micro-alloyed steels is achieved due to very finely distributed pre‐ cipitates (mostly carbides and/or nitrides) in connection with the final rolling in a certain tempera‐ ture range – the thermomechanical rolling. Due to their fine grain structure, fine-grained steels have a high fatigue limit. 3.4
High-strength IF steels (IF)
Like the soft IF steels, high-strength IF steels have extremely low carbon contents and are stabi‐ lized by titanium and/or niobium. Therefore, these steels can be stored for a nearly unlimited time. The higher strength is achieved with solid solution hardening by adding manganese, phosphorus, and/or silicon. Very good formability is achieved due to the greater hardness, the lack of a pro‐ nounced yield point, high elongation at break, and high r values. 3.5
Bake-hardening steels (BH)
The strength is achieved with solid solution hardening by adding manganese, phosphorus, and sili‐ con. In bake-hardening steels, carbon dissolved in the lattice leads to a defined increase in the yield point when heat treatments are performed, such as the heat treatments that usually occur in automobile painting processes (e.g., 170 °C, 20 minutes). The buckling strength is thereby im‐ proved for skin parts. Because the change in the mechanical properties (yield point, elongation at
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break, tensile strain hardening exponent) occurs even at room temperature, albeit very slowly, the storage life of these steel grades is limited. 3.6
Phosphorus-alloy steels (P)
The strength is achieved with solid solution hardening by adding phosphorus. In regard to formabil‐ ity, these steels lie near the BH steels and between the micro-alloyed steels and the high-strength IF steels. Due to limited availability, the use of phosphorus-alloy steels must be agreed upon in ad‐ vance with Procurement. 3.7
Dual-phase steels (DP)
The microstructure of dual-phase steels consists of a ferritic matrix, in which islands of a predomi‐ nantly martensitic second phase are embedded. While having high tensile strength, dual-phase steels have a low yield point ratio (Re/Rm) and a high cold work hardening rate. Therefore, they are especially suited for stretch forming processes. 3.8
TRIP steels
TRIP (Transformation Induced Plasticity) or residual-austenite steels have a fine-grained ferriticbainitic matrix structure, in which residual austenite is embedded. In addition, small fractions of martensite can be present. During deformation, the residual austenite is transformed into marten‐ site and thus causes a high cold work hardening rate. As a result, high tensile strength is achieved together with high elongation before reduction. In conjunction with the bake-hardening effect, high component strength can be achieved. TRIP steels are suitable for stretch forming as well as for deep drawing. However, higher pressing and sheet holder forces are required during forming, and a strong springback must be taken into account. 3.9
Complex-phase steels (CP)
Complex-phase steels have a largely ferritic-bainitic matrix structure, with fractions of martensite and/or tempered martensite, residual austenite, and pearlite. The extremely fine-grained micro‐ structure is achieved by retarded recrystallization or by the precipitation of microalloying elements. In comparison with dual-phase steels, these steels have higher yield points, a greater yield point ratio, a lower cold work hardening rate, and a higher hole expansion capability. 3.10
Ferritic-bainitic steels (FB)
Ferritic-bainitic steels have a matrix of ferrite or hardened ferrite, in which bainite or hardened bain‐ ite is embedded. The high strength of the matrix is caused by grain refinement, the precipitation of microalloying elements, and a high dislocation density. 3.11
Martensitic steels (MS)
Martensitic steels have a largely martensitic microstructure with small fractions of ferrite and/or bainite and thus very high strength. Suitability for deep drawing is limited; these steel grades are suitable predominantly for forming methods involving bending, such as roll forming. 3.12
Electrolytic galvanization (EG)
Electrolytically applied zinc coating having a zinc content of at least 99,9 mass percent, which is galvanically applied to a suitably prepared steel surface as a coil coating.
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3.13
Hot-dip zinc coating (hot-dip galvanizing, GI)
Application of a zinc coating by dipping an appropriately prepared strip into a molten bath with a zinc content of at least 99 mass percent. 3.14
Hot-dip zinc-iron alloy coating (galvannealed, GA)
This zinc-iron alloy coating is produced by dipping appropriately prepared strip into a molten bath with a zinc content of at least 99 mass percent and by subsequently performing a heat treatment. In the process, iron diffuses into the zinc coating. The resulting coating has a uniform matte-gray appearance and an iron content of typically 8 mass percent to 13 mass percent. 3.15
Hot-dip aluminum-silicon coating (AS)
Application of an aluminum-silicon coating by dipping appropriately prepared strip into a molten bath that consists of aluminum and 8 mass percent to 11 mass percent silicon. 3.16
Hot-dip zinc-magnesium coating (ZM)
Application of a zinc-magnesium coating by dipping appropriately prepared strip into a molten zinc bath having fractions of magnesium and aluminum totaling 1,5 mass percent to 8 mass percent. 4
Description
4.1
Soft steels
The codes of the soft steels consist of the rolling type (hot- or cold-rolled strip) and the grade num‐ ber 1 to 5 (see table 1). The higher the grade number, the better the formability. Table 1 – Designation of soft steels Rolling type CR = cold-rolled HR = hot-rolled
Grade number 1 = drawing quality 2 = deep-drawing grade 3 = specific deep-drawing grade 4 = special deep-drawing grade 5 = super deep-drawing grade 6 = super deep-drawing grade
Alloy (optional) IF Non-IF
The chemical quality of the steel can be specified more precisely by adding "IF" or "Non-IF". IF steels have a very low carbon content, typically less than 0,02 mass percent, in order to improve the forming properties. Without this addition, the alloy is left to the supplier's discretion within the bounds of the specifications as per table A.1. Designation example for a soft cold-rolled steel, grade 3, hot-dip galvanized with a coating weight of at least 40 g/m2 per side, surface quality for inner parts (O3): VW 50065 – CR3-GI40/40-U-O Designation example for a soft cold-rolled steel, grade 4, electrolytically galvanized with a coating weight of at least 29 g/m2 per side, surface quality for skin parts (O5), prephosphated: VW 50065 – CR4-EG29/29-E-P-O
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4.2
High-strength steels
High-strength steels are designated by the rolling type, the minimum yield point in MPa (longitudi‐ nal direction), and the steel type (see table 2). Table 2 – Designation of high-strength steels Rolling type
Minimum proof stress
CR = cold-rolled
nnn nnn = Rp0,2, min in MPa
HR = hot-rolled
Steel type BH = bake hardening IF = interstitial-free P = phosphorus-alloyed MC = fine-grained steel LA = low-alloy or micro-alloy
Designation example for a cold-rolled high-strength low-alloy steel with a minimum yield point of 240 MPa, uncoated, surface quality for non-skin parts (inner parts, O3): VW 50065 – CR240LA-UC-U-O Designation example for a cold-rolled high-strength bake-hardening steel with a minimum yield point of 180 MPa, hot-dip galvanized with a coating weight of at least 40 g/m2 per side, surface quality for skin (O5): VW 50065 – CR180BH-GI40/40-E-O Designation example for a hot-rolled fine-grained steel with a minimum yield point of 420 MPa, un‐ coated, pickled and oiled, without special requirements for the surface finish: VW 50065 – HR420MC-UC-O 4.3
Multiphase steels
Multiphase steels are designated by the rolling type, the minimum yield point in MPa with the sym‐ bol "Y", the minimum tensile strength in MPa with the symbol "T" (longitudinal direction), and the steel type (see table 3). Table 3 – Designation of multiphase steels Rolling type
Mechanical properties
Steel type
CR = cold-rolled
nnnY
-CP = complex-phase -DP = dual-phase
HR = hot-rolled
nnn = minimum proof stress Rp0,2, min in MPa
mmmT mmm = minimum ten‐ sile strength Rm, min in MPa
-MS = martensite phase TR = TRIP -FB = ferritic-bainitic
Designation example for a cold-rolled dual-phase steel with a minimum yield point of 330 MPa and a minimum tensile strength of 590 MPa, hot-dip galvanized with a coating weight of at least 40 g/m2 per side, surface quality for non-skin parts (inner parts, O3): VW 50065 – CR330Y590T-DP-GI40/40-U-O
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Designation example for a hot-rolled complex-phase steel with a minimum yield point of 660 MPa and a minimum tensile strength of 760 MPa, uncoated, pickled and oiled, without special require‐ ments for the surface type: VW 50065 – HR660Y760T-CP-UC-O 4.4
Coating and surface type
The coating is defined by the type of coating and the minimum coating mass in g/m2 for each side (single-spot test). Uncoated flat products are specified by indicating "UC" ("Uncoated") instead of a coating type and coating weight. The surface type is specified as "U" for a typical skin-passed surface for non-skin parts ("Unex‐ posed") or "E" for a best cold-finished surface for skin parts ("Exposed"); see table 4. For skin grades ("E"), the first number indicates the coating of the better side 1 (outside). For non-skin-passed hot-rolled products without special requirements for the surface finish, the in‐ dication of the surface type "U" can be omitted. Examples: – …-EG29/29-E = electrolytically galvanized with 29 g/m2 minimum coating per side for skin –
…-GI40/40-U = hot-dip galvanized with 40 g/m2 minimum coating per side for inner parts
–
…-GA40/40-E = hot-dip coated with zinc-iron alloy coating (galvannealed) with 40 g/m2 mini‐ mum coating per side for skin
–
…-AS45/45-U = hot-dip coated with aluminum-silicon coating (hot-dip aluminized) with 45 g/m2 minimum coating per side for inner parts
–
…-ZM30/30-U = hot-dip coated with zinc-magnesium coating with 45 g/m2 minimum coating per side for inner parts Table 4 – Designation of the coating, surface type, and surface treatment
Type of coating
Coating code
-EG = electrolytically galvanized -GI = hot-dip galvanized -GA = hot-dip coated with zinc-iron alloy coating (galvannealed) -AS = hot-dip coated with aluminum-silicon alloy coating -ZM = hot-dip coated with zinc-magnesium alloy coating
nn/mm nn = minimum coating in g/m2 on side 1 (bet‐ ter side, outside) mm = minimum coat‐ ing in g/m2 on side 2
Surface type
Surface treatment (optional)
-U = inner parts, (O3) -O = oiled -P = prephosphated -E = skin (O5) -/- = for hot-rolled strip without special requirements for the surface type
-UC = uncoated For additional designation examples, see appendix C Section C.1.
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5
Requirements
5.1
Basic and additional requirements
Approval of first supply and changes as per VW 01155. Avoidance of hazardous substances as per VW 91101. Additional requirements can be agreed upon between the orderer and the supplier, e.g., restricted characteristic mechanical values, coatings, or thickness and width tolerances. 5.2
Steelmaking method and deoxidation type of the steel
The steelmaking method for the steel is left to the manufacturer. If agreed, the steelmaking method for the steel must be disclosed to the orderer. The steels as per this standard must be fully killed (RR) and have sufficient contents of nitrogenbinding elements. 5.3
Delivery
The products are delivered as strips (coils, rings), split strips cut from strips, or sheets (blanks). Strips must be delivered with trimmed coil edges. Hot-rolled flat products are usually supplied in thicknesses of at least 1,6 mm, and pickled and oiled in the case of uncoated products. Deviations from the thickness limit of 1,6 mm are possible depending on the steel grade, coating, dimensions, and production process (e.g., thin-strip cast‐ ing). Oiling as per quality specifications of process materials QP A001. 5.4
Limit deviations and form tolerances
Unless otherwise agreed, as per DIN EN 10051 for hot-rolled flat products, as per DIN EN 10131 for cold-rolled uncoated and electrolytically galvanized flat products, and as per DIN EN 10143 for continuously hot-dip coated steel sheet and strip. The restricted thickness tolerances are used in each case. 5.5
Chemical composition
See table A.1 to table A.6. Determination as per DIN EN ISO 14284. The content of unlisted elements is left up to the manufacturer, as long as the specified properties and the processing are not impaired. 5.6
Mechanical properties
The mechanical properties specified in table A.7 to table A.12 apply to the following grades and time periods, starting from the agreed upon provision by the manufacturer: – – –
1 month for CR1 3 months for bake-hardening steels (North America: 6 months) 6 months for all other grades
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5.6.1
Determination of the mechanical properties
Determination of the mechanical properties as per ISO 6892-1, specimen form 2 (gage length L0 = 80 mm), with respect to specimen cross-sections including coatings. Alternative specimen form 1 (L0 = 50 mm) upon agreement. For hot-rolled strip in thicknesses ≥3 mm, a proportional specimen with L0 = 5,65 √So (S0: specimen cross-section) can also be used to determine the elon‐ gation at break A. In general, agreement upon one specimen form is sufficient. The test method (A or B as per ISO 6892-1) must be agreed upon between the supplier and the customer. Samples must be taken transversely to the rolling direction for soft steels and longitudi‐ nally to the rolling direction for high-strength steels and multiphase steels, as per DIN EN ISO 377. Deviating testing directions are possible after special agreement. For a pronounced yield point, the value of the lower yield point ReL applies to the minimum yield point. The normal anisotropy (r value) is determined as per ISO 10113 at an elongation of 20%. The tensile strain hardening exponent (n value) is determined as per ISO 10275 in the elongation interval from 10% to 20%. Both the r value and the n value must be determined in the range of homogeneous plastic deformation. For an elongation before reduction less than 20%, the n value must be determined from 10% to the elongation before reduction Ag, and the r value must be deter‐ mined at Ag. For dual-phase steels, the tensile strain hardening exponent between 4% and 6% plastic elonga‐ tion characterizes the material property at low elongation. This value is usually not determined but can be agreed upon as part of the materials release process. The mean normal anisotropy rm/20 can be agreed upon for the release tests of a grade. The BH2 value (yield point increase of 2% plastically prestretched specimens after heat treatment in the painting process at 170 °C/20 min) must be determined as per DIN EN 10325. This characteristic value is usually examined as part of the release of a grade. 5.6.2
Restrictions of the mechanical properties for certain product types
See table A.13. Unless otherwise agreed, the following minimum value and time periods, starting from the agreed upon provision by the manufacturer, apply to the BH2 value for bake-hardening steels: – –
30 MPa for 3 months (except North America) 20 MPa for 6 months (North America)
For grades produced in the thin-strip casting method, unless otherwise agreed, the mechanical properties and dimensional tolerances of the cold-rolled products are applied. 5.7
Microstructure
5.7.1
Grain size
The grain size must be essentially uniform over the entire thickness range so that the component properties are not impaired. The grain size must be determined as per ASTM E112 upon request. 5.7.2
Microstructural banding and material inhomogeneities
The frequency and type of material inhomogeneities (e.g., martensite bands, slag inclusions, seg‐ regations) must be in accordance with the state of the art and must be avoided to the extent possi‐ ble, so that the formability is demonstrably unimpaired.
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Cracks and material separations resulting from shear stress during trimming and/or forming parallel to the sheet-metal plane (typically in the sheet center) are not permissible (see figure 1).
Legend 1 2
Secondary cracks perpendicular to the principal normal stress Cracks parallel to the sheet-metal plane
Figure 1 – Impermissible cracks parallel to the sheet-metal plane after trimming and forming due to material inhomogeneities (SEM photograph) of the trim edge) The fulfillment of this specification must be verified upon request for the material release (and upon request for production deliveries). 5.7.3
Purity grade
Upon agreement between the manufacturer and the supplier, one of the following methods must be used: – –
ASTM E45, method D. Specimen l-r; analysis at 100x magnification. The inclusion size and frequency must not exceed index 2.0. PV 1070, method M. The inclusion size must not exceed size index 2.
5.8
Coatings
Applied coatings must be uniform on the substrate. Uncoated areas are not permissible. 5.8.1
Coating masses
See table A.14. The coating mass is indicated as a minimum value in grams per square meter for each side. Un‐ less otherwise agreed, the single-spot test as per DIN EN ISO 1460 must be used to determine the coating mass. Alternative methods, (e.g., triple-spot test, nondestructive methods) can be agreed upon separately between the orderer and the supplier. The value for the density of the coating is specified in table A.14 so that conversions between coating thickness and coating mass can be performed.
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5.8.2
Additional element contents (GI, GA)
The content of aluminum in the zinc coating of hot-dip galvanized products (GI, GA) depends on thickness (substrate and coating) and must not exceed 0,8 mass percent. 5.9
Surface
5.9.1
Surface for non-skin parts – "U", unexposed
Slight surface flaws are permissible as long as they do not impair the processability and the adhe‐ sion of subsequent coatings. Unless otherwise agreed, the products must be delivered with small zinc spangles in the skinpassed state. 5.9.2
Surface for skin parts – "E", exposed
The inspected side of surface type "E" must enable uniform high-quality paintwork. It must not have any defects or flaws such as micro-overlaps with non-metallic inclusions or zinc blisters that later lead to paint flaws in the paintwork. The other side must correspond at least to surface type "U". Upon agreement, both sides may be delivered with surface type "E". Flow lines are not permissible for 6 months after delivery, 3 months after delivery for BH steels (6 months for North America). The products must be delivered free from zinc spangles in the skinpassed state. 5.9.3
Roughness of cold-finished products
The requirements for the average roughness Ra and the number of peaks RPc must be agreed upon between the orderer and the supplier. These values are determined as per DIN EN 10049. 5.9.4
Surface of hot-rolled products without special requirements for the surface type
Uncoated hot-rolled products must always be delivered pickled (descaled) and oiled to ensure good processability and adhesion of subsequent coatings. The sheet metal must be free of overlaps, blisters, overlaps with non-metallic inclusions, cracks, and scratches that can impair the processability. Pores, slight pits, slight impressions, slight scratches, discoloration, and kinks from unreeling are permissible. The flaws must not be of a type that lead to destruction or damage of the tools or to difficulties in welding during processing. The products are generally delivered without having been skin-passed, but can be delivered slight‐ ly skin-passed as per the manufacturer's selection or upon agreement at the time of the RFQ. If the requirements of surface type "U" (permissibility of surface flaws, skin-pass rolling, and rough‐ ness) must be fulfilled, this must be indicated also for hot-rolled strip steel. 5.9.5
Surface treatment
Surface treatment is required as agreed between the orderer and the supplier. The flat products must be sealed in such a way that no corrosion occurs during transport or stor‐ age. The corrosion protection depends on the surface treatment and the storage conditions. Only slushing oils, prelubes, and forming lubricants released as per QP A001 must be used.
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5.9.6
Suitability for phosphating
It must be possible to flawlessly pretreat the flat products in the receiving plants so that a uniform phosphate layer or alternative pretreatment layer can form. 5.9.7
Prephosphating
The layer properties of the prephosphating of electrolytically coated products must adhere to the specifications of QP A012. 6
Processing instructions for joining multiphase steels (AHSS)
The joining method of assemblies with high-strength multiphase steels as per table A.6 and table A.12 must be agreed upon with the appropriate departments at an early stage. The applica‐ ble standards, Process Specifications, and Test Specifications for joining sheet steel must be taken into consideration. 6.1
Welding
In general, welding of multiphase steels by resistance spot welding, gas-shielded arc welding, stud welding, and laser welding is possible without preheating. Depending on the joining situation (sheet thicknesses, joining partners, component), these steels tend to harden in the welding zone and in the heat-affected zone. The available processing window for resistance spot welding is smaller compared to that for soft deep-drawing grade steel, and higher electrode forces are recommended. If multi-phase steels of different quality are welded together, additional weldability constraints may exist. The welding suitability must be documented for the relevant sheet pairing by welding tests. 6.2
MIG and laser brazing
Multiphase steels can be joined by MIG or laser brazing using copper-based materials. Depending on the joining situation (sheet thicknesses, method, joining partners, component), these steels tend to a greater or lesser extent to produce local alterations in the base material properties in the brazed area. Usually an additional copper-silicon-based material (Cu 6560/CuSi3Mn1) as per DIN EN ISO 24373 (previously CuSi3 as per DIN 1733-1) is used. Depending on the joining geometry, the wetting and gap filling is different. In addition, the bearing cross-section of the brazed joint is typically reduced in the case of MIG and laser brazing, which significantly influences the fracture behavior under quasistatic loads. Therefore, depending on the fracture position, sheet thickness, and sheet grade, a distinction can be made between strength brazing and joint brazing. – –
Strength brazing: Fracture occurs in the base material. Joint brazing: Fracture occurs in the joint or at the transition point between joint and base ma‐ terial.
Depending on the application, these different brazings must be tested separately.
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6.3
Bonding
Structurally bonded, hot-dip galvanized sheets made of multiphase steels can exhibit isolated zinc separations under load. The associated decrease in the joint strength and energy absorption must be taken into account in the design of the components. 7
Test certificates
Test certificates as per DIN EN 10204 (test certificate 2.1 or 2.2 for an unspecific test or test certifi‐ cate 3.1 or 3.2 for a specific test) must be delivered as agreed. For each testing lot (1 roll or at most 20 t of the same steel grade, nominal thickness, coating mass, and surface finish), a series of tests must be performed to determine the defined mechanical properties (see section 5.6) and the coating mass for coated products (see section 5.8). The specifications of DIN EN 10021 apply to repeated tests. 8
Marking, packaging, and storage life
If agreed upon in the order, VDI 3319 Sheet 1 "Packaging guideline for steel coils and slit strips" applies to the marking, packaging, and storage life of deliveries. Skin grades ("E") must be stamped on the poorer side (inner surface). 9
Applicable documents
The following documents cited in this standard are necessary to its application. Some of the cited documents are translations from the German original. The translations of Ger‐ man terms in such documents may differ from those used in this standard, resulting in terminologi‐ cal inconsistency. Standards whose titles are given in German may be available only in German. Editions in other languages may be available from the institution issuing the standard. PV 1070
Metallographic Examination; Microscopic Examination of Special Steels using Standard Diagrams to Assess the Content of Non-Metallic Inclu‐ sions
QP A001
Prelube, Hot Melt, Blank Washing Oil, Drawing Compound, Slushing Oil (General); Quality Requirements
QP A012
Quality Requirements for the Pre-Phosphating of Electrolytically ZincCoated Sheet Steel
VW 01155
Vehicle Parts; Approval of First Supply and Changes
VW 91101
Environmental Standard for Vehicles; Vehicle Parts, Materials, Operat‐ ing Fluids; Avoidance of Hazardous Substances
ASTM E112
Standard Test Methods for Determining Average Grain Size
ASTM E45
Standard Test Methods for Determining the Inclusion Content of Steel
DIN EN 10021
General technical delivery conditions for steel products
DIN EN 10049
Measurement of roughness average Ra and peak count RPc on metallic flat products
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DIN EN 10051
Continuously hot-rolled strip and plate/sheet cut from wide strip of nonalloy and alloy steels - Tolerances on dimensions and shape
DIN EN 10131
Cold rolled uncoated and zinc or zinc-nickel electrolytically coated low carbon and high yield strength steel flat products for cold forming - Toler‐ ances on dimensions and shape
DIN EN 10143
Continuously hot-dip coated steel sheet and strip - Tolerances on dimen‐ sions and shape
DIN EN 10204
Metallic products - Types of inspection documents
DIN EN 10325
Steel - Determination of yield strenght increase by the effect of heat treatment (Bake-Hardening-Index)
DIN EN ISO 14284
Steel and iron - Sampling and preparation of samples for the determina‐ tion of chemical composition
DIN EN ISO 1460
Metallic coatings - Hot dip galvanized coatings on ferrous materials Gravimetric determination of the mass per unit area
DIN EN ISO 24373
Welding consumables - Solid wires and rods for fusion welding of copper and copper alloys - Classification
DIN EN ISO 377
Steel and steel products - Location and preparation of samples and test pieces for mechanical testing
ISO 10113
Metallic materials - Sheet and strip - Determination of plastic strain ratio
ISO 10275
Metallic materials - Sheet and strip - Determination of tensile strain hard‐ ening exponent
ISO 6892-1
Metallic materials - Tensile testing - Part 1: Method of test at room tem‐ perature
VDA 239-100
Sheet steel for cold forming
VDI 3319 Sheet 1
Packaging guideline for steel coils and slit strips
Page 15 VW 50065: 2013-07
Appendix A (normative) Tables
A.1
Table A.1 to Table A.6: Chemical composition Table A.7 to Table A.12: Mechanical properties Table A.13 "Restrictions of the mechanical properties for certain product types" Table A.14 "Coating masses of coated flat products (coating codes in bold type are preferable)" Table A.1 – Chemical composition of soft steels in mass percent Material
C %
Si %
Mn %
P %
S %
Al %
Ti %
Cold-rolled CR1
≤0,12
≤0,50
≤0,60
≤0,065
≤0,045
≥0,010
-
CR2
≤0,10
≤0,50
≤0,50
≤0,065
≤0,045
≥0,010
-
CR3
≤0,08
≤0,50
≤0,50
≤0,030
≤0,030
≥0,010
≤0,30
CR4
≤0,06
≤0,50
≤0,40
≤0,025
≤0,025
≥0,010
≤0,30
CR5
≤0,02
≤0,50
≤0,30
≤0,020
≤0,020
≥0,010
≤0,30
CR6
≤0,01
≤0,50
≤0,20
≤0,020
≤0,020
≥0,010
≤0,20
≤0,030
≥0,015
-
Hot-rolled HR2
≤0,10
≤0,50
≤0,50
≤0,030
Table A.2 – Chemical composition of high-strength low-alloy and micro-alloyed steels in mass percent Material
C %
Si %
Mn %
P %
S %
Al %
Ti %
Nb %
Cold-rolled CR210LA
≤0,10
≤0,50
≤1,00
≤0,080
≤0,030
≥0,015
-
-
CR240LA
≤0,10
≤0,50
≤1,00
≤0,030
≤0,025
≥0,015
≤0,15
-
CR270LA
≤0,12
≤0,50
≤1,00
≤0,030
≤0,025
≥0,015
≤0,15
≤0,09
CR300LA
≤0,12
≤0,50
≤1,40
≤0,030
≤0,025
≥0,015
≤0,15
≤0,09
CR340LA
≤0,12
≤0,50
≤1,50
≤0,030
≤0,025
≥0,015
≤0,15
≤0,09
CR380LA
≤0,12
≤0,50
≤1,60
≤0,030
≤0,025
≥0,015
≤0,15
≤0,09
CR420LA
≤0,12
≤0,50
≤1,65
≤0,030
≤0,025
≥0,015
≤0,15
≤0,09
CR460LA
≤0,15
≤0,50
≤1,70
≤0,030
≤0,025
≥0,015
≤0,15
≤0,09
Hot-rolled, low-alloy and micro-alloyed HR300LA
≤0,12
≤0,50
≤1,30
≤0,030
≤0,025
≥0,015
≤0,15
≤0,10
HR340LA
≤0,12
≤0,50
≤1,50
≤0,030
≤0,025
≥0,015
≤0,15
≤0,10
HR420LA
≤0,12
≤0,50
≤1,60
≤0,030
≤0,025
≥0,015
≤0,15
≤0,10
HR460LA
≤0,12
≤0,50
≤1,65
≤0,030
≤0,025
≥0,015
≤0,15
≤0,10
HR500LA
≤0,12
≤0,50
≤1,70
≤0,030
≤0,025
≥0,015
≤0,15
≤0,10
Page 16 VW 50065: 2013-07
Material
C %
Si %
Mn %
P %
S %
Al %
Ti %
Nb %
Hot-rolled fine-grained steels HR300MC
≤0,12
≤0,50
≤1,30
≤0,030
≤0,025
≥0,015
≤0,15
≤0,10
HR340MC
≤0,12
≤0,50
≤1,50
≤0,030
≤0,025
≥0,015
≤0,15
≤0,10
HR420MC
≤0,12
≤0,50
≤1,60
≤0,030
≤0,025
≥0,015
≤0,15
≤0,10
HR460MC
≤0,12
≤0,50
≤1,65
≤0,030
≤0,025
≥0,015
≤0,15
≤0,10
HR500MC
≤0,12
≤0,50
≤1,70
≤0,030
≤0,025
≥0,015
≤0,15
≤0,10
HR550MC
≤0,12
≤0,50
≤1,80
≤0,030
≤0,025
≥0,015
≤0,15
≤0,10
HR700MC
≤0,12
≤0,60
≤2,10
≤0,030
≤0,025
≥0,015
≤0,15
≤0,10
Table A.3 – Chemical composition of cold-rolled high-strength IF steels in mass percent Material
C %
Si %
Mn %
P %
S %
Al %
Ti %
Nb %
CR160IF
≤0,01
≤0,30
≤0,60
≤0,060
≤0,025
≥0,010
≤0,12
≤0,09
CR180IF
≤0,01
≤0,30
≤0,70
≤0,060
≤0,025
≥0,010
≤0,12
≤0,09
CR210IF
≤0,01
≤0,30
≤0,90
≤0,080
≤0,025
≥0,010
≤0,12
≤0,09
CR240IF
≤0,01
≤0,30
≤1,60
≤0,10
≤0,025
≥0,010
≤0,12
≤0,09
Table A.4 – Chemical composition of cold-rolled bake-hardening steels in mass percent C %
Si %
Mn %
P %
S %
Al %
CR180BH
≤0,06
≤0,50
≤0,70
≤0,060
≤0,025
≥0,015
CR210BH
≤0,08
≤0,50
≤0,70
≤0,085
≤0,025
≥0,015
CR240BH
≤0,10
≤0,50
≤1,00
≤0,10
≤0,030
≥0,010
Material
Table A.5 – Chemical composition of cold-rolled phosphorus-alloy steels in mass per‐ cent Material
C %
Si %
Mn %
P %
S %
Al %
CR210P
≤0,08
≤0,50
≤0,70
≤0,085
≤0,025
≥0,015
CR240P
≤0,10
≤0,50
≤1,00
≤0,10
≤0,030
≥0,010
Use is permissible only after agreement with Procurement.
Page 17 VW 50065: 2013-07
Table A.6 – Chemical composition of multiphase steels in mass percent Material
C %
Si %
Mn %
P %
S %
Al %
Ti+Nb Cr+Mo % %
B %
Cold-rolled dual-phase steels CR290Y490T-DP
≤0,14
≤0,50
≤1,80
≤0,080 ≤0,015
0,015 to 1,0
≤0,15
≤1,00
≤0,005
CR330Y590T-DP
≤0,15
≤0,75
≤2,50
≤0,040 ≤0,015
0,015 to 1,5
≤0,15
≤1,40
≤0,005
CR440Y780T-DP
≤0,18
≤0,80
≤2,50
≤0,080 ≤0,015
0,015 to 2,0
≤0,15
≤1,40
≤0,005
≤0,15
≤1,40
≤0,005
CR590Y980T-DP
≤0,20
≤1,00
≤2,90
≤0,080 ≤0,015
0,015 to 2,0
CR700Y980T-DP
≤0,23
≤1,00
≤2,90
≤0,080 ≤0,015
0,015 to 2,0
≤0,15
≤1,40
≤0,005
0,015 to 0,1
≤0,15
≤1,40
≤0,005
Hot-rolled dual-phase steel HR330Y580T-DP
≤0,14
≤1,0
≤2,20
≤0,085 ≤0,015
Cold-rolled TRIP steels CR400Y690T-TR
≤0,24
≤2,0
≤2,20
≤0,080 ≤0,015
0,015 to 2,0
≤0,20
≤0,60
≤0,005
CR450Y780T-TR
≤0,25
≤2,2
≤2,50
≤0,080 ≤0,015
0,015 to 2,0
≤0,20
≤0,60
≤0,005
≤0,080 ≤0,015
0,015 to 2,0
≤0,15
≤1,00
≤0,005
≤0,080 ≤0,015
0,015 to 1,4
≤0,15
≤1,00
≤0,005
Cold-rolled complex-phase steels CR570Y780T-CP
CR780Y980T-CP
≤0,18
≤0,23
≤1,00
≤1,00
≤2,50
≤2,70
Hot-rolled complex-phase and martensitic steels HR660Y760T-CP
≤0,18
≤1,00
≤2,20
≤0,080 ≤0,015
0,015 to 1,2
≤0,25
≤1,00
≤0,005
HR900Y1180T-MS
≤0,25
≤0,80
≤2,50
≤0,060 ≤0,015
0,015 to 2,0
≤0,25
≤1,20
≤0,005
Page 18 VW 50065: 2013-07
C %
Material
Si %
Mn %
P %
S %
Al %
Ti+Nb Cr+Mo % %
B %
Hot-rolled ferritic-bainitic steels HR300Y450T-FB
≤0,18
≤0,50
≤2,00
≤0,050 ≤0,010
0,015 to 2,0
HR440Y580T-FB
≤0,18
≤0,50
≤2,00
≤0,050 ≤0,010
0,015 to 2,0
≤0,15
≤1,00
≤0,010
HR600Y780T-FB
≤0,18
≤0,50
≤2,00
≤0,050 ≤0,010
0,015 to 2,0
≤0,15
≤1,00
≤0,010
≤0,15
≤1,00
≤0,005
Table A.7 – Mechanical properties of soft steels (testing in transverse direction) Elongation at break Material
Proof Tensile stress Rp0,2 strength Rm MPa MPa
A %
A50 mm %
r
A80 mm %
r90/20
rm/20
n10 – 20/Ag
Cold-rolled CR1
140 to 300
270 to 410
-
≥30
≥28
-
-
-
CR2
140 to 240
270 to 370
-
≥34
≥34
≥1,3
≥1,2
≥0,16
CR3
140 to 210
270 to 350
-
≥38
≥38
≥1,8
≥1,5
≥0,18
CR4
140 to 180
270 to 330
-
≥40
≥39
≥1,9
≥1,6
≥0,20
CR5
110 to 170
260 to 330
-
≥42
≥41
≥2,1
≥1,8
≥0,22
CR6a)
110 to 170
250 to 330
-
≥44
≥43
≥2,3
≥2,0
≥0,23
≥30
-
-
≥0,16
Hot-rolled HR2
180 to 290
270 to 400
≥34
≥32
For restrictions, see section 5.6.2 and table A.13 a)
Provisional values, limited availability
Page 19 VW 50065: 2013-07
Table A.8 – Mechanical properties of high-strength low-alloy and micro-alloyed steels and fine-grained steels (testing in longitudinal direction) Elongation at break Material
Proof Tensile stress Rp0,2 strength Rm MPa MPa
A %
A50 mm %
r
A80 mm %
r0/20
rm/20
n10 – 20/Ag
Cold-rolled CR210LA
210 to 300
310 to 410
-
≥31
≥29
≥1,0
≥1,1
≥0,15
CR240LA
240 to 320
320 to 420
-
≥29
≥27
-
-
≥0,15
CR270LA
270 to 350
350 to 450
-
≥27
≥25
-
-
≥0,14
CR300LA
300 to 380
370 to 470
-
≥25
≥23
-
-
≥0,14
CR340LA
340 to 430
410 to 520
-
≥23
≥21
-
-
≥0,12
CR380LA
380 to 470
450 to 560
-
≥21
≥19
-
-
≥0,12
CR420LA
420 to 520
480 to 590
-
≥18
≥17
-
-
≥0,11
CR460LAa)
460 to 580
520 to 680
≥16
≥15
≥0,09
Hot-rolled, low-alloy and micro-alloyed HR300LA
300 to 380
380 to 500
≥28
≥26
≥24
-
-
≥0,14
HR340LA
340 to 440
420 to 540
≥26
≥24
≥22
-
-
≥0,13
HR420LA
420 to 520
480 to 600
≥23
≥21
≥19
-
-
-
HR460LA
460 to 560
520 to 640
≥22
≥20
≥18
-
-
-
HR500LA
500 to 620
560 to 700
≥22
≥20
≥18
-
-
-
Page 20 VW 50065: 2013-07
Elongation at break Material
Proof Tensile stress Rp0,2 strength Rm MPa MPa
A %
A50 mm %
r
A80 mm %
r0/20
rm/20
n10 – 20/Ag
Hot-rolled fine-grained steels HR300MC
300 to 380
380 to 500
≥28
≥26
≥24
-
-
≥0,14
HR340MC
340 to 440
420 to 540
≥26
≥24
≥22
-
-
≥0,13
HR420MC
420 to 520
480 to 600
≥21
≥20
≥18
-
-
-
HR460MC
460 to 560
520 to 640
≥20
≥19
≥17
-
-
-
HR500MC
500 to 620
560 to 700
≥17
≥16
≥14
-
-
-
HR550MCa)
550 to 680
600 to 760
≥15
≥14
≥12
-
-
-
HR700MCa)
700 to 850
750 to 950
≥13
≥12
≥10
-
-
-
For restrictions, see section 5.6.2 and table A.13 a)
Provisional values, limited availability
Table A.9 – Mechanical properties of cold-rolled high-strength IF steels (testing in longi‐ tudinal direction) Elongation at break Material
r
Proof stress Rp0,2 MPa
Tensile strength Rm MPa
A50 mm %
A80 mm %
n10 – 20/Ag r0/20
rm/20
CR160IF
160 to 210
280 to 340
≥40
≥38
≥1,4
≥1,5
≥0,20
CR180IF
180 to 240
330 to 400
≥38
≥35
≥1,2
≥1,3
≥0,19
CR210IF
210 to 270
340 to 410
≥36
≥33
≥1,1
≥1,3
≥0,18
Page 21 VW 50065: 2013-07
Elongation at break Material
CR240IF
r n10 – 20/Ag
Proof stress Rp0,2 MPa
Tensile strength Rm MPa
A50 mm %
A80 mm %
r0/20
rm/20
240 to 300
360 to 430
≥34
≥31
≥1,0
≥1,2
≥0,17
For restrictions, see section 5.6.2 and table A.13 Table A.10 – Mechanical properties of cold-rolled bake-hardening steels (testing in lon‐ gitudinal direction) Elongation at break Material
Proof Tensile stress Rp0,2 strength Rm MPa MPa
r
A50 mm %
A80 mm %
r0/20
rm/20
n10 – 20/Ag
CR180BH
180 to 240
290 to 360
≥35
≥34
≥1,1
≥1,3
≥0,17
CR210BH
210 to 270
320 to 400
≥34
≥32
≥1,1
≥1,2
≥0,16
CR240BH
240 to 300
340 to 440
≥31
≥29
≥1,0
≥1,1
≥0,15
BH2 MPa
≥20 / ≥30a)
For restrictions, see section 5.6.2 and table A.13 a)
see section 5.6.2
Table A.11 – Mechanical properties of cold-rolled phosphorus-alloy steels (testing in longitudinal direction) Elongation at break Proof Tensile stress Rp0,2 strength Rm MPa MPa
Material
r
A50 mm %
A %
r0/20
rm/20
n10–20/Ag
CR210Pa)
210 to 270
320 to 400
≥34
≥32
≥1,1
≥1,2
≥0,17
CR240P
240 to 300
340 to 440
≥31
≥29
≥1,0
≥1,1
≥0,16
a)
For restrictions, see section 5.6.2 and table A.13 a)
Limited availability; use is permissible only after agreement with Procurement.
Page 22 VW 50065: 2013-07
Table A.12 – Mechanical properties of multiphase steels (testing in longitudinal direc‐ tion) Elongation at break Material
Proof stress Rp0,2 MPa
Tensile strength Rm MPa
A %
A50 mm %
n
A80 mm %
n4 – 6
n10 – 20/Ag
BH2 MPa
Cold-rolled dual-phase steels CR290Y490T-DP
290 to 380
490 to 600
-
≥26
≥24
≥0,19
≥0,15
≥30
CR330Y590T-DP
330 to 430
590 to 700
-
≥21
≥20
≥0,18
≥0,14
≥30
CR440Y780T-DP
440 to 550
780 to 900
-
≥15
≥14
≥0,15
≥0,11
≥30
CR590Y980T-DP
590 to 740
980 to 1130
-
≥11
≥10
-
-
≥30
CR700Y980T-DP
700 to 850
980 to 1130
-
≥9
≥8
-
-
≥30
≥19
≥0,16
≥0,13
≥30
Hot-rolled dual-phase steel HR330Y580T-DP
330 to 450
580 to 680
≥23
≥21
Cold-rolled TRIP steels CR400Y690T-TR
400 to 520
690 to 800
-
≥25
≥24
-
≥0,19
≥40
CR450Y780T-TR
450 to 570
780 to 910
-
≥22
≥21
-
≥0,16
≥40
Cold-rolled complex-phase steels CR570Y780T-CP
570 to 720
780 to 920
-
≥11
≥10
-
-
≥30
CR780Y980T-CP
780 to 950
980 to 1140
-
≥7
≥6
-
-
≥30
Page 23 VW 50065: 2013-07
Elongation at break Tensile strength Rm MPa
Proof stress Rp0,2 MPa
Material
A50 mm %
A %
n
A80 mm %
n4 – 6
n10 – 20/Ag
BH2 MPa
Hot-rolled complex-phase and martensitic steels HR660Y760T-CP
660 to 820
760 to 960
≥13
≥11
≥10
-
-
≥30
HR900Y1180T-MS
900 to 1150
1180 to 1400
≥8
≥6
≥5
-
-
≥30
Hot-rolled ferritic-bainitic steels HR300Y450T-FB
300 to 400
450 to 550
≥27
≥25
≥24
-
-
≥30
HR440Y580T-FB
440 to 600
580 to 700
≥17
≥16
≥15
-
-
≥30
HR600Y780T-FBa)
600 to 760
780 to 920
≥15
≥13
≥12
-
-
≥30
For restrictions, see section 5.6.2 and table A.13 a)
Provisional values, limited availability
Table A.13 – Restrictions of the mechanical properties for certain product types Steel type
Coating
All
Thick‐ ness
Proof stress
Elonga‐ tion at break %
r
r0/20
r90/20
rm/20
mm
min. MPa
max. MPa
EG, GI, UC
<0,60
-
-
-2
-
-
-
All
EG, GI, UC
>1,60
-
-
-
- 0,1
- 0,2
- 0,15
HR LA
GI
All
-
-
-1
-
-
All
AS, GA, ZM
<0,60
-
-
-4
- 0,2
- 0,4
- 0,3
All
AS, GA, ZM
0,60 to 1,60
-
-
-2
- 0,1
- 0,2
- 0,15
All
AS, GA, ZM
>1,60
-
-
-2
- 0,2
- 0,4
- 0,20
CR3 to CR5
EG
All
-
+ 10
-
-
-
-
Page 24 VW 50065: 2013-07
Table A.14 – Coating masses of coated flat products (coating codes in bold type are preferable) Type
EG
Coating code
Old designation Coating mass per as per DIN EN (tri‐ side (single-spot ple-spot test) test) g/m2
Thickness per side (informative) μm
12/12
ZE25/25
12 to 32
1,7 to 4,5
29/29
ZE50/50
29 to 49
4,1 to 6,9
47/47
ZE75/75
47 to 61
6,6 to 8,6
40/40
Z100
40 to 60
5,6 to 8,5
50/50a)
-
50 to 70
7,0 to 10
Z140
60 to 90
8,5 to 13
-
70 to 100
9,9 to 14
ZF100
40 to 60
5,6 to 8,5
50/50
ZF120
50 to 80
7,0 to 10
30/30
AS80
30 to 65
10 to 20
AS120
45 to 85
15 to 28
GI 60/60
70/70
a)
40/40 GA
AS 45/45
Density g/cm3
7,1
7,1
7,1
3
Page 25 VW 50065: 2013-07
Type
ZMb)
Coating code
Old designation Coating mass per as per DIN EN (tri‐ side (single-spot ple-spot test) test) g/m2
Thickness per side (informative) μm
30/30
ZM70
30 to 55
4,5 to 7,7
40/40
ZM90
40 to 65
6,2 to 9,2
ZM120
50 to 80
7,7 to 12
50/50 a)
Use is permissible only after agreement with the appropriate quality assurance department or the brand laboratory.
b)
Provisional values; use of ZM coating must be agreed upon with the appropriate department.
Density g/cm3
6,2 to 6,9
Page 26 VW 50065: 2013-07
Appendix B (informative) B.1
Deviations from VDA Material Sheet 239-100
The following requirements deviate from VDA Material Sheet 239-100: – Applicable thickness range up to 6,5 mm – Steelmaking method and specification of deoxidation type (fully killed) – Incorporation of grades CR6, CR210P, CR240P, CR460LA, HR550MC, HR700MC – Limit deviations and tolerances of form as per DIN EN 10051, DIN EN 10131, and DIN EN 10143 – Addition of impermissible cracks parallel to the sheet-metal plane after trimming and forming – Deletion of ZN coating (electrolytic zinc-nickel) – Preferable coatings are indicated – Oiling as per Quality Specification QP A001, prephosphating as per QP A012 – Addition of "Processing instructions for joining multiphase steels" – Addition of applicable Group standards – Correspondence of codes between standards B.2
Correspondence of codes between standards (informative)
For the correspondence of codes between standards, see table B.1 to table B.7.
DC01
DC03
DC04
DC05
DC06
DC07
DD14
CR1
CR2
CR3
CR4
CR5
CR6
HR2
-
DX58D
DX57D
DX56D
DX54D
DX53D
DX52D
Grade as per DIN EN/VW/TL +U/+ZE +Z/+ZF
Grade as per VW 50065
-
-
-
St15
St14
RRSt13
St12
+U/+ZE
Old designations
-
-
-
St07 Z
St06 Z
St05 Z
St03 Z
+Z/+ZF
Table B.1 – Correspondence of codes between standards for soft steels
-
-
-
-
-
-
-
Changes as compared to DIN EN/VW/TL
Page 27 VW 50065: 2013-07
TL 1550-220
HC260LA
HC300LA
HC340LA
HC380LA
HC420LA
HC460LA
-
CR210LA
CR240LA
CR270LA
CR300LA
CR340LA
CR380LA
CR420LA
CR460LA
HX500LAD
HX460LAD
HX420LAD
HX380LAD
HX340LAD
HX300LAD
HX260LAD
TL 1550-220
Grade as per DIN EN/VW/TL +U/+ZE +Z/+ZF
Grade as per VW 50065
-
-
ZStE 420
ZStE 380
ZStE 340
ZStE 300
ZStE 260
ZStE 220
+U/+ZE
Old designations
-
-
-
-
ZStE 340 Z
ZStE 300 Z
ZStE 260 Z
ZStE 220 Z
+Z/+ZF
Testing direction
Testing direction
Testing direction
Testing direction
Testing direction
Testing direction
Testing direction
Testing direction
Changes as compared to DIN EN/VW/TL
Table B.2 – Correspondence of codes between standards for cold-rolled high strength micro-alloyed steels
Page 28 VW 50065: 2013-07
HC220Y
HC260Y
HC180B
HC220B
HC260B
HC220P
HC260P
CR210IF
CR240IF
CR180BH
CR210BH
CR240BH
CR210P
CR240P
supplier-dependent
HC180Y
CR180IF
a)
-
CR160IF
HX260PD
HX220PD
HX260BD
HX220BD
HX180BD
HX260YD
HX220YD
HX180YD
HX160YD
Grade as per DIN EN/VW/TL +U/+ZE +Z/+ZF
Grade as per VW 50065
ZStE 260 P
ZStE 220 P
ZStE 260 BH
ZStE 220 BH
ZStE 180 BH
-
-
-
-
+U/+ZE
Old designations
ZStE 260 P Z
ZStE 220 P Z
-
-
-
-
-
-
-
+Z/+ZF
Testing direction
Testing direction
Testing direction
Testing direction
Testing direction
Strength a), testing direction
Strength a), testing direction
Strength a), testing direction
Strength a), testing direction
Changes as compared to DIN EN/VW/TL
Table B.3 – Correspondence of codes between standards for cold-rolled high-strength IF and BH steels
Page 29 VW 50065: 2013-07
S355MC
S420MC
S460MC
S500MC
S550MC
S700MC
HR340MC
HR420MC
HR460MC
HR500MC
HR550MC
HR700MC
supplier-dependent
S315MC
HR300MC
a)
Grade as per DIN EN/VW/TL
Grade as per VW 50065
-
QStE 550 TM
QStE 500 TM
QStE 460 TM
QStE 420 TM
QStE 340 TM
-
Old designations
-
-
-
-
-
Strength a)
Strength a)
Changes as compared to DIN EN/VW/TL
Table B.4 – Correspondence of codes between standards for hot-rolled fine-grained steels
Page 30 VW 50065: 2013-07
Grade as per VW 50060-1 to -5 +U/+ZE
HC300X
HC340X
HC450X
HC600X
HC660X
HD330X
HC410T
HC470T
HC600C
HC800C
HD680C
HD900M
-
-
-
Grade as per VW 50065
CR290Y490T-DP
CR330Y590T-DP
CR440Y780T-DP
CR590Y980T-DP
CR700Y980T-DP
HR330Y580T-DP
CR400Y690T-TR
CR450Y780T-TR
CR570Y780T-CP
CR780Y980T-CP
HR660Y760T-CP
HR900Y1180T-MS
HR300Y450T-FB
HR440Y580T-FB
HR600Y780T-FB
-
-
-
-
HD680CD
HC800CD
HC600CD
HC470TD
HC410TD
-
HC660XD
HC600XD
HC450XD
HC340XD
HC300XD
+Z/+ZF
HDT560F
HDT450F
HDT1200M
HDT780C
HCT980C
HCT780C
HCT780T
HCT690T
HDT580X
-
HCT980X
HCT780X
HCT600X
HCT500X
Grade as per DIN EN
Table B.5 – Correspondence of codes between standards for multiphase steels
FB780
FB590
FB450
MS1200
CP800
CP980
CP800
TRIP800
TRIP700
DP600
DP980HY
DP980
DP780
DP600
DP500
Trivial name
Page 31 VW 50065: 2013-07
Zinc-magnesium (ZM)
Aluminum-silicon (AS, hot-dip aluminized)
Galvannealed (GA)
ZM70 ZM90 ZM120
ZM40/40 ZM50/50
AS120
AS45/45 ZM30/30
AS80
ZF120
GA50/50 AS30/30
ZF100
Z140
GI60/60 GA40/40
Z100
GI40/40
ZE75/75
EG47/47
Hot-dip-galvanized (GI)
ZE50/50
EG29/29
Electrolytically galvanized (EG)
Coating as per DIN EN
Coating as per VW 50065
Type
Table B.6 – Correspondence of codes between standards for coatings
7,7 to 12
6,2 to 9,2
4,5 to 7,7
15 to 28
10 to 20
7,0 to 10
5,6 to 8,5
8,5 to 13
5,6 to 8,5
6,6 to 8,6
4,1 to 6,9
Thickness per side in μm
Page 32 VW 50065: 2013-07
Quality as per VW 50065
E
U
Type
Skin (O5), "Exposed"
Inner parts (O3), "Unexposed" A
B
Quality as per DIN EN +U/+ZE B
C
+Z/+ZF
Table B.7 – Correspondence of codes between standards for surface quality
Page 33 VW 50065: 2013-07
Page 34 VW 50065: 2013-07
Appendix C (informative) C.1
Description examples Table C.1 – Description examples
Type
Designation as per VW 50065
Designation as per DIN EN/VW 50060-1 to -5
Soft steel, hot-dip galvanized, inner-part quality
CR3-GI40/40-U-O
DX54D+Z100-M-B-O
Soft steel, electrolytically galvan‐ ized, skin quality
CR5-EG47/47-E-P-O
DC06+ZE75/75-B-PO
Micro-alloyed steel, ungalvanized, CR240LA-UC-U-O inner-part quality
HC260LA-A-O
Micro-alloyed steel, galvanized, inner-part quality
HX340LAD+Z100-M-B
CR300LA-GI40/40-U-O
IF steel, electrolytically galvanized, CR210IF-EG29/29-E-P-O skin quality
HC220Y+ZE50/50-B-PO
BH steel, hot-dip galvanized, skin quality
CR180BH-GI40/40-E-O
HX180BD+Z100-M-C-O
Fine-grained steel, hot-rolled
HR420MC
S420MC
Multiphase steel, hot-dip galvan‐ ized (DP steel)
CR330Y590T-DP-GI60/60-U-O HC340XD+Z140-M-B-O
Multiphase steel, hot-rolled (CP steel)
HR660Y760T-CP
HC680C
