ASTM A1008.A1008M REV A 2012.pdf

Designation: A1008/A1008M − 12a

Standard Specification for

Steel, Sheet, Cold-Rolled, Carbon, Structural, High-Strength Low-Alloy, High-Strength Low-Alloy with Improved Formability, Solution Hardened, and Bake Hardenable 1 This standard is issue issued d under the fixed designation designation A1008/A1008M A1008/A1008M;; the number immedi immediately ately following the desig designation nation indicates indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.

1. Sco Scope* pe*

E646 Test Method for Tensile Strain-Hardening Exponents E646 Test ( n -Values) of Metallic Sheet Materials

1.1 This specification specification covers cold-rolled, cold-rolled, carbon, structural, structural, high-streng high-str ength th lowlow-allo alloy y, hig high-s h-stren trength gth low low-all -alloy oy with improved prove d form formability ability,, soluti solution on harden hardened, ed, and bake harde hardenable nable steel sheet, in coils and cut lengths.

3. Terminology 3.1 Definitions of Terms Specific to This Standard: 3.1. 3. 1.1 1 For For de defin finit itio ions ns of ot othe herr te term rmss us used ed in th this is specification, refer to Terminology A941 Terminology A941.. 3.1.2 aging— loss loss of ductility with an increase in hardness, yield strength, and tensile strength that occurs when steel that has been slightly cold worked (such as by temper rolling) is stored for some time. 3.1.2.1 Discussion— Aging Aging increases the tendency of a steel to exhibit stretcher strains and fluting.

1.2 Cold rolled rolled steel sheet is available available in the designations designations as listed in 4.1 4.1.. 1.3 This 1.3 This sp speci ecific ficati ation on do does es no nott ap appl ply y to ste steel el st stri rip p as described describ ed in Specifi Specification cation A109/A109M A109/A109M.. 1.4 The values stated in either SI units or inch-pound inch-pound units are to be regarded separately as standard. The values stated in each system may not be exa exact ct equ equiva ivalen lents; ts; the theref refore ore,, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

3.1.3 bake hardenable steel— steel steel in which significant aging is realize realized d when moderate heat treatment, such as that used for paint baking, follows straining or cold working. inclusio sion n con contr trol, ol, n— the 3.1.4 inclu t he pr proc oces esss of re redu ducin cing g th thee volu vo lume me fr frac actio tion n of in inclu clusio sions ns or mo modi dify fyin ing g th thee sh shap apee of inclusions to improve formability, weldability, and machinability. 3.1.4.1 Discussion— Inclusions, Inclusions, especia especially lly those elonga elongated ted during the rolling process, create the conditions for initiating and/or and /or pro propag pagatin ating g crac cracks ks whe when n the mate materia riall is str stretch etched ed or bent during the manufacture of a part. The adverse effects of inclusions are minimized by reducing the content of inclusions in the steel and/or by altering the shape of inclusions through the use of additions during the steelmaking process that change the elongated shape of the inclusions to less harmful small, well disper dispersed sed globu globular lar inclus inclusions. ions.

2. Referenc Referenced ed Documents Documents 2.1 ASTM Standards: 2 A109/A109M Spe Specific cificatio ation n for Stee Steel, l, Str Strip, ip, Car Carbon bon (0. (0.25 25 Maximum Percent), Cold-Rolled A370 Test A370 Test Methods and Definitions for Mechanical Testing of Steel Products A568/A568M Sp Speci ecifica ficatio tion n fo forr Ste Steel, el, Sh Sheet eet,, Car Carbo bon, n, Structural, and High-Strength, Low-Alloy, Hot-Rolled and Cold-Rolled, Cold-R olled, Gener General al Requir Requirements ements for A941 Terminology A941 Terminology Relating to Steel, Stainless Steel, Related Alloys,, and Ferro Alloys Ferroalloys alloys E18 Test E18 Test Methods for Rockwell Hardness of Metallic Materials E517 Test E517 Test Method for Plastic Strain Ratio r for Sheet Metal

solid-solutio olution n har hardened dened steel or solut solution ion har hardened dened 3.1.5 solid-s steel— steel steel strengthened through additions of elements, such as Mn, P, or Si, that can be dissolved within the crystalline structure of steels. 3.1.5.1 Discussion— Alloyi Alloying ng ele elemen ments ts that for form m a sol solididsolution with iron provide strengthening as a result of local distortions in atomic arrangements, which arise as a result of the mismatch between the atomic sizes of such elements and that of iron.

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This specification is under the jurisdiction of ASTM Committee A01 A01 on on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.19 on A01.19 on Steel Sheet and Strip. Current edition approved Nov. 1, 2012. Published November 2012. Originally approved in 2000. Last previous edition approved in 2012 as A1008/A1008M – 12. DOI: 10.1520/A1008_A1008M-12a. 2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [email protected]. For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on the ASTM website.

3.1.6 stabilization— addi a dditi tion on of on onee or more more ni nitr trid idee- or carb ca rbid idee-fo form rmin ing g el elem emen ents, ts, or bo both th,, su such ch as titan titaniu ium m an and d

*A Summary of Changes section appears at the end of this standard Copyright © ASTM International, 100 Barr Harbor Drive, PO--``,````,`,,,`,```,`,,,,``,```-`-`,,`,,`,`,,`--Box C700, West Conshohocken, PA 19428-2959. United States Copyright ASTM International Provided by IHS under license with ASTM No reproduction or networking permitted without license from IHS

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A1008/A1008M A1008/A 1008M − 12a columbium, to control the level of the interstitial elements of carbon and nitrogen in the steel. 3.1.6.1 Discussion— Stabilizing Stabilizing impro improves ves forma formability bility and increases resistance to aging.

5.1.2.2 5.1.2. 2 Whe When n a clas classs is not specifie specified d for HSLAS, HSLAS, Class 1 will be furnished (see 4.1 4.1); ); 5.1.2.3 5.1.2 .3 When a type is not specified for SS 33 [230] and SS 40 [275], Type 1 will be furnished (see 4.1 4.1); ); 5.1.3 5.1 .3 Classificati Classification on (eit (either her exp expose osed, d, unex unexpos posed, ed, temp temper er rolled, or annealed last) (see 4.3 4.3)); 5.1.4 Finish (see (see 9.1 9.1); ); 5.1.5 Oiled or not oiled, as required required (see 9.2 9.2); ); 5.1.6 Dimensions (thickness, width, and whether whether cut lengths or coils);

3.1.7 vacuum degassing— process process of refining liquid steel in which the liquid is exposed to a vacuum as part of a special techniq tech nique ue for rem removi oving ng imp impuri urities ties or for dec decarb arburi urizing zing the steel. 4. Clas Classifica sification tion

NOTE 2—Not all producers are capable of meeting all the limitations of the thickn thickness ess tolerance tables in Specifi Specification cation A568/A568M. A568/A568M. The purchaser should contact the producer regarding possible limitations prior to placing an order.

4.1 Cold-ro Cold-rolled lled steel she sheet et is ava availab ilable le in the fol follow lowing ing designations: 4.1.1 Commer Commercial cial Steel (CS Types Types A, B, and C), 4.1.2 Drawin Drawing g Steel (DS Types Types A and B),

5.1.7 5.1 .7 Coil Coil siz sizee (m (mus ustt inc includ ludee ins insid idee di diame ameter ter,, ou outsi tside de diameter, and maximu diameter, maximum m weigh weight); t); 5.1.8 Coppe Copperr bearing steel (if requi required); red); 5.1.9 Quant Quantity; ity; 5.1.10 5.1.1 0 Applic Application ation (part identifi identification cation and descri description) ption);; 5.1. 5. 1.1 11 A re repo port rt of he heat at an anal alys ysis is wi will ll be su supp pplie lied, d, if requested, for CS, DS, DDS, and EDDS. For materials with required requi red mechan mechanical ical prop properties, erties, SS, HSLAS HSLAS,, HSLAS HSLAS-F -F,, SHS, and BHS, a report is required of heat analysis and mechanical properties as determined by the tension test, and 5.1.12 5.1.1 2 Special requirements requirements (if any). 5.1.12.1 5.1.1 2.1 When the purch purchaser aser requires thickness tolerances tolerances 3 for ⁄ 8 in. [10 mm] minimum edge distance (see Supplementary Requirement in Specification A568/A568M Specification A568/A568M)), this requirement shall be specified in the purchase order or contract.

NOTE 1—CS Type B and DS Type B describe the most common product previously includ previously included, ed, respe respectively ctively,, in Specifi Specification cationss A366 A366/A366 /A366M M and A620/A620M.

4.1.3 Deep Drawing Drawing Steel (DDS), 4.1.4 Extra Deep Drawing Drawing Steel (EDDS), 4.1.5 Structu Structural ral Steel (SS grades 25[170], 25[170], 30[205], 30[205], 33[23 33[230] 0] Type ypess 1 and 2, 40[ 40[275 275]] Type ypess 1 and 2, 45[ 45[310 310], ], 50[ 50[340 340], ], 60[410], 70[480], and 80[550]). 4.1.6 HighHigh-Streng Strength th Low-Alloy Low-Alloy Steel (HSLA (HSLAS, S, in classes 1 and 2, in grades 45[310], 50[340]. 55[380], 60[410], 65[450], and 70[480] in Classes 1 and 2), and 4.1.7 HighHigh-Streng Strength th Low-Alloy Steel with Impro Improved ved Formability abil ity (HS (HSLAS LAS-F -F gra grades des 50[ 50[340 340], ], 60[ 60[410 410], ], 70[ 70[480 480], ], and 80[550]). 4.1.7. 4.1 .7.1 1 HSLAS-F HSLAS-F ste steel el has imp improv roved ed for formab mabilit ility y whe when n compared to HSLAS. The steel is fully deoxidized, made to fine grain practice and includes microalloying elements such as colu co lumb mbiu ium, m, va vana nadi dium um,, zir zirco coni nium um,, et etc. c. Th Thee ste steel el sh shall all be treated to achieve inclusion control. 4.1.8 Solutio Solution n hardened steel (SHS), and 4.1.9 Bake hardenable hardenable steel (BHS).

NOTE 3—A typical typical ord orderi ering ng des descri cripti ption on is as fol follow lows: s: AST ASTM M A 1008-XX, cold rolled steel sheet, CS Type A, exposed, matte finish, oiled, 0.035 by 30 in. by coil, ID 24 in., OD 48 in., max weight 15 000 lbs, 100 000 lb, for part No. 4560, Door Panel. or: ASTM A 1008M-XX, cold-rolled steel sheet, SS grade 275, unexposed, matte finish, oiled, 0.88 mm by 760 mm by 2440 mm, 10 000 kg, for shelf bracket.

6. General Requirements Requirements for Delivery Delivery

4.2 When required required for HSLAS and HSLAS-F steels, steels, limitations on the use of one or more of the microalloy elements shall be specified on the order.

6.1 Mat Materia eriall fur furnis nished hed und under er thi thiss spe specifi cificati cation on sha shall ll con con-form to the applicable requirements of the current edition of Specification A568/A568M Specification A568/A568M unless otherwise provided herein.

4.3 ColdCold-rolled rolled steel sheet is supplied for either exposed or unexposed applications. Within the latter category, cold-rolled sheet is specifie specified d either “temper rolled” or “annea “annealed led last.” For details on processing, attributes and limitations, and inspection standards, refer to Specification A568/A568M A568/A568M..

7. Chem Chemical ical Compositio Composition n 7.1 7. 1 Th Thee he heat at an analy alysis sis of th thee st steel eel sh shal alll co conf nfor orm m to th thee chemical composition requirements of the appropriate designation shown in Table 1 for 1 for CS, DS, DDS, and EDDS and in Table 2 for 2 for SS, HSLAS, HSLAS-F, SHS, and BHS.

5. Orde Ordering ring Information Information

7.2 Each of the elements elements listed in Table in Table 1 and 1 and Table 2 shall 2 shall be included in the report of the heat analysis. When the amount of cop copper per,, nic nickel kel,, chr chromi omium, um, or mol molybd ybdenu enum m is less tha than n 0.02 %, report the analysis as <0.02 % or the actual determined value. When the amoun amountt of vanadium, columbium, columbium, or titaniu titanium m is less than 0.008 %, report the analysis as <0.008 % or the actual determined value. When the amount of boron is less than 0.00 0. 0005 05 %, re repo port rt th thee an analy alysis sis as <0 <0.0 .000 005 5 % or th thee ac actu tual al determined value.

5.1 It is the purchase purchaser’s r’s responsi responsibil bility ity to spe specif cify y in the purchase order all ordering information necessary to describe the required material. Examples of such information include, but are not limited to, the following: 5.1.1 ASTM specification specification number number and year of issue; 5.1.2 Name of material and desig designation nation (cold-rolled (cold-rolled steel sheet) (include grade, type, and class, as appropriate, for CS, DS, DDS, EDDS, SS, HSLAS, HSLAS-F, SHS, or BHS) (see 4.1); 4.1 ); 5.1.2.1 5.1.2 .1 When a type is not specified for CS or DS, Type B will be furnished (see 4.1 4.1); ); ` ` , ` ` ` ` , ` , , , ` , ` ` ` , `

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7.3 Sh 7.3 Shee eett steel steel gr grad ades es de defin fined ed by th this is sp spec ecifi ificat catio ion n ar aree suitab sui table le for weld welding ing if app approp ropriat riatee wel weldin ding g con condit dition ionss are 2


A1008/A1008M A1008/A 1008M − 12a TABLE 1 Chemical Composition A For Cold Rolled Steel Sheet Designations CS, DS, DDS, and EDDS Designation

C

D ,E ,F ,G

CS Type A CS Type BD

0. 10 0.02 to 0.15 0. 08 0. 08 0 .0 2 to 0.08 0. 06 0. 02

CS Type CD ,E ,F ,G DS Type AE ,I DS Type B DDSF ,G EDDSJ

Mn

P

% Heat Analysis, Analysis, Elemen Elementt Maximu Maximum m Unless Otherwise Otherwise Shown S Al Si Cu Ni CrB H

Mo

V

Cb

TiC

N

B

0 .6 0 0. 60

0. 03 0 0 .0 3 0

0 .0 3 5 0. 03 5

... ...

... ...

0. 20 0.20H

0 .2 0 0 .2 0

0 .1 5 0 .1 5

0 .0 6 0 .0 6

0 .0 0 8 0 .0 0 8

0 .0 0 8 0 .0 0 8

0 .0 2 5 0 .0 2 5

... ...

... ...

0 .6 0 0 .5 0 0. 50

0. 10 0. 02 0 0 .0 2 0

0 .0 3 5 0 .0 3 0 0. 03 0

... 0 .0 1 m i n 0 .0 2 m i n

... ... ...

0.20H 0. 20 0 .2 0

0 .2 0 0. 20 0 .2 0

0 .1 5 0 .1 5 0 .1 5

0 .0 6 0. 06 0 .0 6

0 .0 0 8 0. 00 8 0 .0 0 8

0 .0 0 8 0. 00 8 0. 00 8

0 .0 2 5 0 .0 2 5 0 .0 2 5

... ... ...

... ... ...

0 .5 0 0 .4 0

0. 02 0 0. 02 0

0 .0 2 5 0 .0 2 0

0 .0 1 m i n 0 .0 1 m i n

... ...

0. 20 0. 10

0. 20 0. 10

0 .1 5 0 .1 5

0. 06 0. 03

0. 00 8 0. 10

0. 00 8 0 .1 0

0 .0 2 5 0. 15

... ...

... ...

A

Where an ellipsis (. . .) appears in the table, there is no requirement, but the analysis result shall be reported. Chromium is permitted, at the producer’s option, to 0.25 % maximum when the carbon content is less than or equal to 0.05 %. C For steels containing 0.02 % or more carbon, titanium is permitted at the producer’s option, to the lesser of 3.4N + 1.5S or 0.025 %. D When an aluminum deoxidized steel is required for the application, it is permissible to order Commercial Steel (CS) to a minimum of 0.01 % total aluminum. E Specify Type B to avoid carbon levels below 0.02 %. F It is permissible to furnish as a vacuum degassed or chemically stabilized steel, or both, at the producer’s option. G For carbon levels less than or equal to 0.02 %, it is permissible to use vanadium, columbium or titanium, or a combination thereof, as stabilizing elements at the producer’s option. In such cases, the applicable limit for vanadium or columbium shall be 0.10 % max. and the limit on titanium shall be 0.15 % max. H When copper steel is specified, the copper limit is a minimum requirement. When copper steel is not specified, the copper limit is a maximum requirement. I If produced utilizing a contin continuous uous anneal process, stabilized stabilized steel is permis permissible sible at the producer’s option, and Footnotes F and G apply apply.. J Shall be furnished as a vacuum degassed and stabilized steel. B

TABLE 2 Chemical Composition A For Cold Rolled Steel Sheet Desig Designation nations s SS, HSLAS, HSLAS HSLAS-F -F,, SHS, and BHS Designation

% Heat Analysis, Analysis, Elemen Elementt Maximum Maximum Unless Otherwise Otherwise Shown P S Al Si CuB Ni Cr Mo

C

Mn

V

Cb

Ti

N

0. 20 0. 20 0 .2 0 0 .1 5 0 .2 0 0 .1 5 0. 20 0. 20 0. 20 0. 20 0. 20

0. 60 0. 60 0 .6 0 0 .6 0 1 .3 5 0 .6 0 1. 35 1. 35 1. 35 1. 35 1. 35

0 .0 3 5 0 .0 3 5 0 .0 3 5 0 .2 0 0 .0 3 5 0 .2 0 0 .0 7 0 0 .0 3 5 0 .0 3 5 0 .0 3 5 0 .0 3 5

0. 03 5 0. 03 5 0. 03 5 0 .0 3 5 0. 03 5 0 .0 3 5 0. 02 5 0. 03 5 0. 03 5 0. 03 5 0. 03 5

... ... ... ... ... ... 0 .0 8 ... ... ... ...

... ... ... ... ... ... 0 .6 0 ... ... ... ...

0 .2 0 0 .2 0 0. 20 0 .2 0 0. 20 0 .2 0 0 .2 0 0 .2 0 0 .2 0 0 .2 0 0 .2 0

0 .2 0 0 .2 0 0 .2 0 0. 20 0 .2 0 0. 20 0. 20 0 .2 0 0 .2 0 0 .2 0 0 .2 0

0. 15 0. 15 0 .1 5 0 .1 5 0 .1 5 0 .1 5 0. 15 0. 15 0. 15 0. 15 0. 15

0. 06 0. 06 0 .0 6 0 .0 6 0 .0 6 0 .0 6 0. 06 0. 06 0. 06 0. 06 0. 06

0 .0 0 8 0 .0 0 8 0. 00 8 0 .0 0 8 0. 00 8 0 .0 0 8 0 .0 0 8 0 .0 0 8 0 .0 0 8 0 .0 0 8 0 .0 0 8

0 .0 0 8 0 .0 0 8 0 .0 0 8 0. 00 8 0 .0 0 8 0. 00 8 0. 00 8 0 .0 0 8 0 .0 0 8 0 .0 0 8 0 .0 0 8

0 .0 2 5 0 .0 2 5 0 .0 2 5 0. 02 5 0 .0 2 5 0. 02 5 0. 00 8 0 .0 2 5 0 .0 2 5 0 .0 2 5 0 .0 2 5

... ... ... ... ... ... 0 .0 3 0 ... ... ... ...

0. 22 0. 15 0. 23 0. 15 0. 25 0. 15 0. 26 0. 15 0. 26 0. 15 0. 26 0. 15

1 .6 5 1 .6 5 1 .6 5 1 .6 5 1 .6 5 1 .6 5 1 .6 5 1 .6 5 1 .6 5 1 .6 5 1 .6 5 1 .6 5

0. 04 0. 04 0. 04 0. 04 0. 04 0. 04 0. 04 0. 04 0. 04 0. 04 0. 04 0. 04

0 .0 4 0 .0 4 0 .0 4 0 .0 4 0 .0 4 0 .0 4 0 .0 4 0 .0 4 0 .0 4 0 .0 4 0 .0 4 0 .0 4

. . . . . . . . . . . .

. . . . . . . . . . . .

. . . . . . . . . . . .

0 .2 0 0 .2 0 0 .2 0 0 .2 0 0 .2 0 0 .2 0 0 .2 0 0 .2 0 0 .2 0 0 .2 0 0 .2 0 0 .2 0

0 .2 0 0 .2 0 0 .2 0 0 .2 0 0 .2 0 0 .2 0 0 .2 0 0 .2 0 0 .2 0 0 .2 0 0 .2 0 0 .2 0

0 .1 5 0 .1 5 0 .1 5 0 .1 5 0 .1 5 0 .1 5 0 .1 5 0 .1 5 0 .1 5 0 .1 5 0 .1 5 0 .1 5

0 .0 6 0 .0 6 0 .0 6 0 .0 6 0 .0 6 0 .0 6 0 .0 6 0 .0 6 0 .0 6 0 .0 6 0 .1 6 0 .1 6

0 .0 0 5 m i n 0 .0 0 5 m i n 0 .0 0 5 m i n 0 .0 0 5 m i n 0 .0 0 5 m i n 0 .0 0 5 m i n 0 .0 0 5 m i n 0 .0 0 5 m i n 0 .0 0 5 m i n 0 .0 0 5 m i n 0 .0 0 5 m i n 0 .0 0 5 m i n



. . . . . . . .

HSLAS-F:D Grade 50 [340] and 60 [410] Grade 70 [480] and 80 [550]

0 .1 5 0 .1 5

1. 65 1. 65

0 .0 2 0 0 .0 2 0

0. 02 5 0. 02 5

... ...

... ...

0. 20 0. 20

0 .2 0 0 .2 0

0 .1 5 0 .1 5

0 .0 6 0 .1 6

0. 00 5 m i n 0. 00 5 m i n

0. 00 5 m i n 0. 00 5 m i n

0 .0 0 5 m i n 0 .0 0 5 m i n

E

SHSF

0 .1 2

1 .5 0

0 .1 2

0 .0 3 0

...

...

0 .2 0

0 .2 0

0 .1 5

0 .0 6

0. 00 8

0 .0 0 8

0 .0 0 8

...

BHSF

0 .1 2

1 .5 0

0 .1 2

0 .0 3 0

...

...

0 .2 0

0 .2 0

0 .1 5

0 .0 6

0. 00 8

0 .0 0 8

0 .0 0 8

...

C

SS: Grade Grade Grade Grade Grade Grade Grade Grade Grade Grade Grade

25 30 33 33 40 40 45 50 60 70 80

[1 70 ] [2 05 ] [2 30 ] [2 30 ] [2 75 ] [2 75 ] [3 10 ] [3 40 ] [4 10 ] [4 80 ] [5 50 ]

HSLAS:D Grade 45 [310] Grade 45 [310] Grade 50 [340] Grade 50 [340] Grade 55 [380] Grade 55 [380] Grade 60 [410] Grade 60 [410] Grade 65 [450] Grade 65 [450] Grade 70 [480] Grade 70 [480]

Type Type Type Type

1 2 1 2

Class Class Class Class Class Class Class Class Class Class Class Class

1 2 1 2 1 2 1 2 1 2 1 2

. . . . . . . . . . . .

. . . . . . . . . . . .

. . . . . . . . . . . .

A

. . . . . . . .

. . . . . . . .

E E E E

E

Where an ellipsis (. . .) appears in the table, there is no requirement but, the analysis shall be reported. When copper is specified, the copper limit is a minimum requirement. When copper steel is not specified, the copper limit is a maximum requirement. C Titanium is permitted for SS designations, at the producer’s option, to the lesser of 3.4N + 1.5S or 0.025 %. D HSLAS and HSLAS-F steels contain the strengthening elements columbium (niobium), vanadium, titanium, and molybdenum added singly or in combination. The minimum requirements only apply to the microalloy elements selected for strengthening of the steel. E The purchaser has the option of restricting restricting the nitrog nitrogen en content. It should be noted that, depend depending ing on the microalloying microalloying scheme (for example, use of vanadi vanadium) um) of the producer, nitrogen may be a deliberate addition. Consideration should be made for the use of nitrogen binding elements (for example, vanadium, titanium). F For carbon levels less than or equal to 0.02 % vanadium, columbium, or titanium, or a combination thereof, are permitted to be used as stabilizing elements at the producer’s option. In such cases, the applicable limit for vanadium and columbium shall be 0.10 % max., and the limit for titanium shall be 0.15 % max. B

` ` , ` ` ` ` , `


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A1008/A1008M A1008/A 1008M − 12a selected.. For cer selected certain tain wel weldin ding g pro proces cesses, ses, if mor moree res restric trictiv tivee composition limits are desirable, they shall be specified at the time of inquiry and confirmed at the time of ordering.

8.2.3.4 Tension test specimens 8.2.3.4 specimens shall be taken from the full thickness of the sheet. 8.2.3.5 8.2.3 .5 Tension test specimens specimens shall be taken from a location approximately halfway between the center of the sheet and the edge of the material as rolled.

8. Mechanical Propertie Propertiess 8.1 CS, DS, DDS, and EDDS: 8.1.1 Typical nonmandatory nonmandatory mechanical properties properties for CS, DS, DDS and EDDS are shown in Table 3. 3. 8.1.2 8.1 .2 The material material shall be cap capabl ablee of being bent, bent, at room temperature, in any direction through 180° flat on itself without cracking on the outside of the bent portion (see Section 14 of Test Methods and Definitions A370). A370). The bend test is not a requirement of delivery. However, if testing is performed by the purchaser, material not conforming to the requirement shall be subject to rejection. 8.1. 8. 1.3 3 Sh Shee eett of th thes esee de desig signa natio tions ns ex excep ceptt fo forr ED EDDS DS ar aree subject to aging dependent upon processing factors such as the method of annealing (continuous annealing or box annealing), and che chemica micall com compos positio ition. n. For add additio itional nal inf inform ormatio ation n on aging, see Appendix X1 of Specification A568/A568M A568/A568M.. 8.1.4 EDDS steel is stabilized to be nonaging nonaging and so is not subject to stretcher strains and fluting. Other steels are processed to be nonaging; please consult your supplier.

8.2.3.6 8.2.3 .6 Tension test samples shall be taken with the length length-wise axis of the test specimen parallel to the rolling direction (longitudinal test). 8.2.3.7 Test Method— Yield strength shall be determined by either the 0.2 % offset method or the 0.5 % extension under load method unless otherwise specified. 8.2.3.8 Bake hardenable 8.2.3.8 hardenable steel shall conform to bake hardening index requirements requirements includ included ed in Table 5 for the grade specified. The method for measuring the bake hardening index is described in Annex in Annex A1. A1. Bake hardenable steel shall exhibit a minimum increase in yield strength of 4 ksi [25 MPa] as based on the upper yield point or 3 ksi [20 MPa] as based on the lower yield stress, after a prestrained specimen has been exposed to a standard bake cycle (340°F [170°C]) for 20 min. 8.2.4 Bending Properties: 8.2.4.1 8.2.4 .1 The suggested suggested minimum inside radii for cold bending are listed in Appendix in Appendix X1 and is discussed in more detail in Specifi Specification cation A568/A568M (Section 6). Wh Wher eree a tig tight hter er bend ben d rad radius ius is req requir uired, ed, whe where re cur curved ved or of offse fsett ben bends ds are invo in volv lved ed,, or wh wher eree st stre retc tchi hing ng or dr draw awin ing g ar aree al also so a consideration, the producer shall be consulted.

8.2 SS, HSLAS, HSLAS-F, SHS, and BHS: 8.2.1 8.2 .1 The ava availab ilable le str streng ength th gra grades des for SS, HSL HSLAS AS and HSLAS-F are shown in Table 4. 4. 8.2.2 8.2 .2 The available available strength strength grades grades for SHS and BHS are shown in Table in Table 5. 5. 8.2.3 Tension Tests: 8.2.3.1 Requirements— Material Material as represented by the test specimen specime n shall conform to the mechanical property requirerequirements specified in Table in Table 4. 4. These requirements requirements do not apply to the uncropped ends of unprocessed coils. 8.2.3.2 Number of Tests— Two Two tension tests shall be made from each heat or from each 50 tons [45 000 kg]. When the amount of finished material from a heat is less than 50 tons [45 000 kg], one test shall be made. When material rolled from heatt dif hea differ ferss 0.0 0.050 50 in. [1.27 mm] or mor moree in thi thickn ckness ess,, one tensi ten sion on tes testt sh shall all be ma made de fr from om th thee th thic icke kest st an and d th thin inne nest st material regardless of the weight represented. 8.2.3. 8.2 .3.3 3 Tens ension ion test spe specim cimens ens shall be tak taken en at a poi point nt immediately adjacent to the material to be qualified.

9. Fini Finish sh and Appearance Appearance 9.1 Surface Finish: 9.1.1 9.1 .1 Unless Unless oth otherw erwise ise spe specifi cified, ed, the she sheet et sha shall ll hav havee a matte finish. When required, specify the appropriate surface textur tex turee and con condit dition ion.. For add additio itional nal inf inform ormatio ation, n, see the Finish and Condition section of Specification A568/A568M Specification A568/A568M.. For additional information see “Finish and Condition” section of Specification A568/A568M Specification A568/A568M.. 9.2 Oiling: 9.2.1 Unless otherwise otherwise specified, specified, the sheet shall be oiled. 9.2.2 When required, required, specify the sheet to be furnished furnished not oiled (dry).

TABLE 3 Typical Ranges of Mechanical Properties A (Nonmandatory)B For Cold Rolled Steel Sheet Designations CS, DS, DDS and EDDS Yield StrengthC

Designation

CS Types A, B, and C DS Types A and B DDS EDDS

ksi 20 t o 40 2 2 to 3 5 1 7 t o 29 1 5 to 2 5

Elongation in 2 in. [50 mm] %C

MPa [ 1 4 0 to 2 7 5 ] [1 5 0 to 2 4 0 ] [115 to 200] [1 0 5 t o 1 7 0 ]

30 36 $38 $40

r m ValueD

F

F

1 .3 t o 1 .7 1 .4 t o 1 .8 1 .7 t o 2 .1

0 . 1 7 to 0 . 2 2 0 . 2 0 to 0 . 2 5 0 . 2 3 to 0 . 2 7

$

$

n -Value -ValueE

A

These typical mechanical mechanical properties properties apply to the full range of steel sheet thicknesses. thicknesses. The yield strength strength tends to increa increase, se, the elonga elongation tion decreases and some of the formability values tend to decrease as the sheet thickness decreases. B The typical mechanical property values presented here are nonmandatory. They are provided to assist the purchaser in specifying a suitable steel for a given application. Values outside of these ranges are to be expected. C Yield Yiel d Streng Strength th and elonga elongation tion are measur measured ed in the longitudinal longitudinal direction in accord accordance ance with Test Methods and Definit Definitions ions A370 A370.. D Average plastic strain ratio (r (r m value) as determined by Test Method E517 Method E517.. E The strain hardening exponent (n-value) as determined by Test Method E646 Method E646.. F No typica typicall proper properties ties have been established. established.

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4


A1008/A1008M A1008/A 1008M − 12a TABLE 4 Mechanical Property RequirementsA For Cold Rolled Steel Sheet Designations SS, HSLAS, and HSLAS-F Designation

Yield Strength, min ksi

SS: Grade 25 [170] Grade 30 [205] Grade 33 [230] Types 1 and 2 Grade 40 [275] Types 1 and 2 Grade 45 [310] Grade 50 [340] Grade 60 [410] Grade 70 [480] Grade 80 [550] HSLAS: Grade 45 Grade 45 Grade 50 Grade 50 Grade 55 Grade 55 Grade 60 Grade 60 Grade 65 Grade 65 Grade 70 Grade 70

[3 1 0 ] [3 1 0 ] [3 4 0 ] [3 4 0 ] [3 8 0 ] [3 8 0 ] [4 1 0 ] [4 1 0 ] [4 5 0 ] [4 5 0 ] [4 8 0 ] [4 8 0 ]

Class Class Class Class Class Class Class Class Class Class Class Class

1 2 1 2 1 2 1 2 1 2 1 2

HSLAS-F: Grade 50 [340] Grade 60 [410] Grade 70 [480] Grade 80 [550]

Tensile Strength, min

E l o n g a ti o n i n 2 i n . o r 50 mm, min, %

[M P a ]

ksi

[MPa]

25 30 33

[ 17 0 ] [ 20 5 ] [2 3 0 ]

42 45 48

[2 9 0 ] [3 1 0 ] [ 33 0]

26 24 22

40

[2 7 5 ]

52

[ 36 0]

20

45 50 60 70 80B

[ 31 0 ] [ 34 0 ] [ 41 0 ] [ 48 0 ] [ 5 5 0]

60 65 75 85 82

[4 1 0 ] [4 5 0 ] [5 2 0 ] [5 8 5 ] [5 6 5 ]

20 18 12 6

45 45 50 50 55 55 60 60 65 65 70 70

[3 1 0 ] [3 1 0 ] [3 4 0 ] [3 4 0 ] [3 8 0 ] [3 8 0 ] [4 1 0 ] [4 1 0 ] [4 5 0 ] [4 5 0 ] [4 8 0 ] [4 8 0 ]

60 55 65 60 70 65 75 70 80 75 85 80

[4 1 0 ] [3 8 0 ] [4 5 0 ] [4 1 0 ] [4 8 0 ] [4 5 0 ] [5 2 0 ] [4 8 0 ] [5 5 0 ] [5 2 0 ] [5 8 5 ] [5 5 0 ]

22 22 20 20 18 18 16 16 15 15 14 14

50 60 70 80

[ 34 0 ] [ 41 0 ] [ 48 0 ] [ 55 0 ]

60 70 80 90

[4 1 0 ] [4 8 0 ] [5 5 0 ] [6 2 0 ]

22 18 16 14

C

A

For coil products, testing by the producer is limited to the end of the coil. Mechanical properties throughout the coil shall comply with the minimum values specified. On this full-hard product, the yield strength approaches the tensile strength and since there is no halt in the gage or drop in the beam, the yield point shall be taken as the yield stress at 0.5 % extension under load. C There is no requirement for elongation in 2 in. for SS Grade 80. B

TABLE 5 Mechanical Property RequirementsA,B For Cold Rolled Steel Sheet Designations SHS and BHS Designation

A B

SHS: Grade Grade Grade Grade Grade

26 31 35 41 44

BHS: Grade Grade Grade Grade Grade

26 31 35 41 44

Yield Strength, min

Tensile Strength, min

ks i

[ M P a]

ksi

[M P a ]

[1 8 0 ] [2 1 0 ] [2 4 0 ] [2 8 0 ] [3 0 0 ]

26 31 35 41 44

[1 8 0 ] [2 1 0 ] [2 4 0 ] [2 8 0 ] [3 0 0 ]

43 46 50 53 57

[3 0 0 ] [3 2 0 ] [3 4 0 ] [3 7 0 ] [3 9 0 ]

[1 8 0 ] [2 1 0 ] [2 4 0 ] [2 8 0 ] [3 0 0 ]

26 31 35 41 44

[1 8 0 ] [2 1 0 ] [2 4 0 ] [2 8 0 ] [3 0 0 ]

43 46 50 53 57

[3 0 0 ] [3 2 0 ] [3 4 0 ] [3 7 0 ] [3 9 0 ]

E l o n g a ti o n i n 2 in. or 50 mm, min., %

Bake Hardening Index, min Upper Yield/Lower Yield ks i

[M P a ]

32 30 26 24 22

... ... ... ... ...

... ... ... ... ...

30 28 24 22 20

4/ 3 4/ 3 4/ 3 4/ 3 4/ 3

2 5 /2 0 2 5 /2 0 2 5 /2 0 2 5 /2 0 2 5 /2 0

Where an ellipsis (. . .) appears in the table, there is no requirement. For coil products, testing by the producer is limited to the end of the coil. Mechanical properties throughout the coil shall comply with the minimum values specified.

unsatisfactory test result is suspected to be the consequence of the test method procedure.

10. Rete Retests sts and Dispo Dispositi sition on of Non-C Non-Confo onformin rming g Mater Material ial 10.1 10. 1 Rete Retests, sts, con conduc ducted ted with the req requir uiremen ements ts of Sec Section tion 11.1 of Specifi 11.1 Specification cation A568/A568M, A568/A568M, ar aree pe perm rmitt itted ed wh when en an


5


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A1008/A1008M A1008/A 1008M − 12a 10.2 Dispo Disposition sition of non-conforming non-conforming materia materiall shall be sub ject to the requirements of Section 11.2 of Specification A568/A568M.. A568/A568M

an elec electro tronic nic dat dataa inte interch rchang angee (ED (EDI) I) tra transm nsmiss ission ion sha shall ll be regarded as having the same validity as a counterpart printed in the cer certifie tifier’s r’s fac facilit ility y. The con conten tentt of the EDI tra transm nsmitte itted d document must meet the requirements of the invoked ASTM standard(s) and conform to any existing EDI agreement between twe en the pur purcha chaser ser and the sup supplie plierr. Not Notwith withstan standin ding g the absenc abs encee of a sig signat nature ure,, the or organ ganizat ization ion sub submitt mitting ing the EDI transmission is responsible for the content of the report.

11. Certification 11.1 11 .1 A repor reportt of heat analysis shall shall be supplied, supplied, if requested, requested, for CS, DS, DDS, and EDDS steels. For material with required mechanical properties, SS, HSLAS, HSLAS-F, SHS, and BHS, a report is required of heat analysis and mechanical properties as determined by the tension test.

12. Pro Product duct Marking Marking 12.1 In addition to the requirements requirements of Specifi Specification cation A568/ A568/ A568M,, each lift or coil shall be marked with the designation A568M shown on the order (CS (Type A, B, or C), DS (Type A or B), DDS,, EDD DDS EDDS, S, SS, HSL HSLAS, AS, HSL HSLASAS-F F, SHS SHS,, or BHS BHS). ). The designation shall be legibly stenciled on the top of each lift or shown on a tag attached to each coil or shipping unit.

11.2 The report shall include the purchase order number, number, the ASTM designation number and year date, product designation, grade, type or class, as applicable, the heat number, and as required, heat analysis and mechanical properties as indicated by the tension test. 11.3 11 .3 A signature signature is not required on the test repor report. t. However, However, the document shall clearly identify the organization submitting the rep report ort.. Not Notwith withstan standin ding g the abs absenc encee of a sig signat nature ure,, the organization submitting the report is responsible for the content of the report.

13. Keyw Keywords ords 13.1 bake hardenable hardenable steel; bake hardening hardening index index;; carbo carbon n steell she stee sheet; et; col cold-r d-rolle olled d ste steel el she sheet; et; com commer mercial cial stee steel; l; dee deep p drawing steel; drawing steel; extra deep drawing steel; highstreng str ength th low low-al -alloy loy ste steel; el; hig high-s h-stre trengt ngth h low low-al -alloy loy ste steel el wit with h improv imp roved ed for formab mabilit ility; y; sol soluti ution on har harden dened ed stee steel; l; ste steel el she sheet; et; structural struct ural steel

11.4 A Mat Materia eriall Test Rep Report ort,, Cer Certific tificate ate of Ins Inspec pection tion,, or similar document document printed from or used in electronic form from

ANNEX (Mandatory Information) A1. BAKE HARDENABLE HARDENABLE STEELS

A1.1 Dete Determin rminatio ation n of Bake Harde Hardening ning Index

A = flow stress stress at 2 % extensio extension n under under load, and and B = yield strength strength [upper [upper yield yield strength strength ( BU ) or lower yield strength ( B L )] after baking at 340°F [170°C] for 20 min.

A1.1.1 The bake hardening A1.1.1 hardening index (BHI) is determined by a two-st two -step ep pro proced cedure ure usi using ng a stan standar dard d lon longitu gitudin dinal al (ro (rollin lling g direction) tensile-test specimen, prepared in accordance with Test Methods and Definitions A370 A370.. The test specimen is first strained in tension. The magnitude of this tensile “pre-strain” shall be 2 % (extension under load). The test specimen is then removed from the test machine and baked at a temperature of 340°F [170°C] for a period of 20 min. Referring to Fig. A1.1, A1.1, the bake hardening index (BHI) of the material is calculated as follows: BHI 5 B 2 A

A1.1.2 The original A1.1.2 original test specim specimen en cross section (width and thickness) is used in the calculation of all engineering strengths in this test. A1.1.3 The pre-strai A1.1.3 pre-strainin ning g of 2 % in ten tensio sion n is int intend ended ed to simulate a modest degree of forming strain, while the subsequent baking is intended to simulate a paint-curing or similar treatment. In the production of actual parts, forming strains and baking treatments can differ from those employed here, and as a result, final properties can differ from the values obtained under these contro controlled lled cond conditions. itions.

(A1.1)

where: ` ` , ` ` ` ` , ` , , , ` , ` ` ` , ` , , , , ` ` , ` ` ` ` ` , , ` , , ` , ` , , ` -


6


A1008/A1008M A1008/A 1008M − 12a

FIG. A1.1 Representation of Bake Hardening Index

APPENDIXES (Nonmandatory Information) X1. BENDING PROPERTIES PROPERTIES

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7


A1008/A1008M A1008/A 1008M − 12a TABLE X1.1 Sugge Suggested sted Minimum Inside Radius for Cold Bendi Bending ng

NOTE 1—( t ) Equals a radius equivalent to the steel thickness. NOTE 2—The suggested radius should be used as a minimum for 90° bends in actual shop practice NOTE 3—Material which does not perform satisfactorily, when fabricated in accordance with the requirements, may be subject to rejection pending pendin g negoti negotiation ation with the steel supplier. supplier. Designation Structural Steel

Grade 25 30 33 40 45 50 60 70 80

[1 7 0 ] [2 0 5 ] [2 3 0 ] [2 7 5 ] [3 1 0 ] [3 4 0 ] [4 1 0 ] [4 8 0 ] [5 5 0 ]

45 50 55 60 65 70

[3 1 0 ] [3 4 0 ] [3 8 0 ] [4 1 0 ] [4 5 0 ] [4 8 0 ]

Minimum Inside Radius for Cold Bending 1 ⁄ 2 t 1 t 11 ⁄ 2 t 2 t 21 ⁄ 2 t 21 ⁄ 2 t 3 t 4 t no t a pp l i c a bl e

High-Strength Low-Alloy Steel

Class 1 11 ⁄ 2 t 2 t 2 t 21 ⁄ 2 t 3 t 31 ⁄ 2 t

High-Strength Low-Alloy Steel with Improved Formability 50 [ 34 0 ] 6 0 [4 1 0 ] 7 0 [4 8 0 ] 8 0 [5 5 0 ]

Class 2 11 ⁄ 2 t 11 ⁄ 2 t 2 t 2 t 21 ⁄ 2 t 3 t

1 t 11 ⁄ 2 t 2 t 2 t

Solu So luti tion on Ha Hard rden ened ed St Stee eell

26 [1 [180 80]] 3 1 [2 1 0 ] 3 5 [2 4 0 ] 4 1 [2 8 0 ] 4 4 [3 0 0 ]

⁄ 2 t 1 t 11 ⁄ 2 t 2 t 2 t

Bake Ba ke Ha Hard rden enab able le St Stee eell

26 [1 [180 80]] 3 1 [2 1 0 ] 3 5 [2 4 0 ] 4 1 [2 8 0 ] 4 4 [3 0 0 ]

⁄ 2 t 1 t 11 ⁄ 2 t 2 t 2 t

1

1

X2. RELA RELATED TED ISO ST STANDARDS ANDARDS

The IS The ISO O st stan anda dard rdss lis liste ted d be belo low w may be re revi view ewed ed fo forr compar com pariso ison n wit with h this ASTM stan standar dard. d. The rela relatio tionsh nship ip between the standards may only be approximate; therefore, the respective respec tive standards should be consu consulted lted for actual requirements. Those who use these documents must determine which specifications specific ations address their needs needs..


ISO 3574 Cold-Reduced Carbon Steel Sheet of Commercial and Drawing Qualities ISO 4997 Cold-Reduced Steel Sheet of Structural Quality ISO 13887 Cold-Reduced Cold-Reduced Steel Sheet of Higher Strength Strength with Improved Formability

8


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A1008/A1008M A1008/A 1008M − 12a X3. HARDNESS PROPERTIE PROPERTIES S TABLE X3.1 Typical Hardness Values

NOTE 1—The hardness values shown are at the time of shipment. NOTE 2—Test for hardness shall be conducted in accordance with the requirements of Test Methods E18 Methods E18.. NOTE 3—The hardness values are Rockwell B scale as measured or converted from the approp converted appropriate riate Rockw Rockwell ell scales scales.. NOTE 4—The typical hardness values apply to the full range of steel sheet thickness. Hardness tends to increase as the steel sheet thickness decreases. NOTE 5—Hardnes 5—Hardnesss testin testing g is commonly used to asses assesss the relative formability of various designations of uncoated steel sheet. This assessment done by many users is recognized to be only an approximation of the relativ rel ativee for formab mabili ility ty and ther therefo efore re can cannot not be use used d as a spe specifi cificat cation ion requirement. Designation

HardnessRockwell B Scale 7 0 or l e s s 7 0 or l e s s 7 0 or l e s s 6 0 or l e s s 6 0 or l e s s 55 o r l e s s 45 o r l es s

CS Type A CS Type B CS Type C DS Type A DS Type B DDS EDDS

SUMMARY OF CHANGES Committ Comm ittee ee A0 A01 1 ha hass id iden entifi tified ed th thee lo loca catio tion n of se selec lected ted ch chan ange gess to th this is st stan anda dard rd sin since ce th thee la last st iss issue ue (A1008/A1008M – 12) that may impact the use of this standard. (Approved Nov. 1, 2012.) (1) Added grade 45 to Section 4.1.5. (2) Metric value for grade 45 corrected to [310] in Table 4.

(3) Added grade 45 to Table X1.1.

Committ Comm ittee ee A0 A01 1 ha hass id iden entifi tified ed th thee lo loca catio tion n of se selec lected ted ch chan ange gess to th this is st stan anda dard rd sin since ce th thee la last st iss issue ue (A1008/A1008M – 11) that may impact the use of this standard. (Approved March 1, 2012.) Remove oved d ref refere erence ncess to sta standa ndards rds A366 and A620 fro from m (1) Rem Section 2. ASTM International International takes no positi position on respecting the validi validity ty of any patent rights assert asserted ed in connec connection tion with any item mentio mentioned ned in this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the responsible respon sible technical technical committee, which you may attend. If you feel that your comments have not receiv received ed a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the above address addr ess or at 610610-832832-9585 9585 (pho (phone), ne), 610610-832832-9555 9555 (fax (fax), ), or serv service@ ice@astm astm.org .org (e-m (e-mail) ail);; or thro through ugh the ASTM webs website ite (www.astm. (www .astm.org). org). Permission Permission rights to photocopy the standa standard rd may also be secure secured d from the ASTM website (www.astm.or (www.astm.org/ g/ COPYRIGHT/).

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ASTM A1008.A1008M REV A 2012.pdf

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