ASTM A1008 A1008M-2008a Standard Specification for Steel Sheet Cold-Rolled Carbon Structural High-Strength Low-Alloy High-Strength Low-Alloy with Improved Formability Solution Hard.pdf

1、Designation: A 1008/A 1008M 08aStandard Specification forSteel, Sheet, Cold-Rolled, Carbon, Structural, High-StrengthLow-Alloy, High-Strength Low-Alloy with ImprovedFormability, Solution Hardened, and Bake Hardenable1This standard is issued under the fixed designation A 1008/A 1008M; the number imme

2、diately following the designation indicates theyear of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of lastreapproval. A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 Thi

3、s specification covers cold-rolled, carbon, structural,high-strength low-alloy, high-strength low-alloy with im-proved formability, solution hardened, and bake hardenablesteel sheet, in coils and cut lengths.1.2 Cold rolled steel sheet is available in the designations aslisted in 4.1.1.3 This specif

4、ication does not apply to steel strip asdescribed in Specification A 109/A 109M.1.4 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsystem shall be used independently of th

5、e other. Combiningvalues from the two systems may result in non-conformancewith the standard.2. Referenced Documents2.1 ASTM Standards:2A 109/A 109M Specification for Steel, Strip, Carbon (0.25Maximum Percent), Cold-RolledA 366/A 366M Specification for Commercial Steel (CS)Sheet, Carbon (0.15 Maximu

6、m Percent) Cold-Rolled3A 370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA 568/A 568M Specification for Steel, Sheet, Carbon,Structural, and High-Strength, Low-Alloy, Hot-Rolled andCold-Rolled, General Requirements forA 620/A 620M Specification for Drawing Steel (DS),Sheet, C

7、arbon, Cold-Rolled3A 941 Terminology Relating to Steel, Stainless Steel, Re-lated Alloys, and FerroalloysE18 Test Methods for Rockwell Hardness of MetallicMaterialsE 517 Test Method for Plastic Strain Ratio r for Sheet MetalE 646 Test Method for Tensile Strain-Hardening Exponents(n -Values) of Metal

8、lic Sheet Materials3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 For definitions of other terms used in this specifica-tion, refer to Terminology A 941.3.1.2 agingloss of ductility with an increase in hardness,yield strength, and tensile strength that occurs when steel thath

9、as been slightly cold worked (such as by temper rolling) isstored for some time.3.1.2.1 DiscussionAging increases the tendency of a steelto exhibit stretcher strains and fluting.3.1.3 bake hardenable steelsteel in which significantaging is realized when moderate heat treatment, such as thatused for

10、paint baking, follows straining or cold working.3.1.4 inclusion control, nthe process of reducing thevolume fraction of inclusions or modifying the shape ofinclusions to improve formability, weldability, and machinabil-ity.3.1.4.1 DiscussionInclusions, especially those elongatedduring the rolling pr

11、ocess, create the conditions for initiatingand/or propagating cracks when the material is stretched orbent during the manufacture of a part. The adverse effects of1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct respons

12、ibility of SubcommitteeA01.19 on Steel Sheet and Strip.Current edition approved Oct. 1, 2008. Published October 2008. Originallyapproved in 2000. Last previous edition approved in 2008 asA 1008/A 1008M 08.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer S

13、ervice at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshoh

14、ocken, PA 19428-2959, United States.inclusions are minimized by reducing the content of inclusionsin the steel and/or by altering the shape of inclusions throughthe use of additions during the steelmaking process that changethe elongated shape of the inclusions to less harmful small,well dispersed g

15、lobular inclusions.3.1.5 solid-solution hardened steel or solution hardenedsteelsteel strengthened through additions of elements, suchas Mn, P, or Si, that can be dissolved within the crystallinestructure of steels.3.1.5.1 DiscussionAlloying elements that form a solid-solution with iron provide stre

16、ngthening as a result of localdistortions in atomic arrangements, which arise as a result ofthe mismatch between the atomic sizes of such elements andthat of iron.3.1.6 stabilizationaddition of one or more nitride- orcarbide-forming elements, or both, such as titanium andcolumbium, to control the le

17、vel of the interstitial elements ofcarbon and nitrogen in the steel.3.1.6.1 DiscussionStabilizing improves formability andincreases resistance to aging.3.1.7 vacuum degassingprocess of refining liquid steel inwhich the liquid is exposed to a vacuum as part of a specialtechnique for removing impuriti

18、es or for decarburizing thesteel.4. Classification4.1 Cold-rolled steel sheet is available in the followingdesignations:4.1.1 Commercial Steel (CS Types A, B, and C),4.1.2 Drawing Steel (DS Types A and B),NOTE 1CS Type B and DS Type B describe the most commonproduct previously included, respectively

19、, in Specifications A 366/A 366M and A 620/A 620M.4.1.3 Deep Drawing Steel (DDS),4.1.4 Extra Deep Drawing Steel (EDDS),4.1.5 Structural Steel (SS grades 25170, 30205, 33230Types 1 and 2, 40275 Types 1 and 2, 50340, 60410,70480, and 80550).4.1.6 High-Strength Low-Alloy Steel (HSLAS, in classes 1and 2

20、, in grades 45310, 50340. 55380, 60410, 65450,and 70480 in Classes 1 and 2), and4.1.7 High-Strength Low-Alloy Steel with Improved Form-ability (HSLAS-F grades 50340, 60410, 70480, and80550).4.1.7.1 HSLAS-F steel has improved formability whencompared to HSLAS. The steel is fully deoxidized, made tofi

21、ne grain practice and includes microalloying elements such ascolumbium, vanadium, zirconium, etc. The steel shall betreated to achieve inclusion control.4.1.8 Solution hardened steel (SHS), and4.1.9 Bake hardenable steel (BHS).4.2 When required for HSLAS and HSLAS-F steels, limi-tations on the use o

22、f one or more of the microalloy elementsshall be specified on the order.4.3 Cold-rolled steel sheet is supplied for either exposed orunexposed applications. Within the latter category, cold-rolledsheet is specified either “temper rolled” or “annealed last.” Fordetails on processing, attributes and l

23、imitations, and inspectionstandards, refer to Specification A 568/A 568M.5. Ordering Information5.1 It is the purchasers responsibility to specify in thepurchase order all ordering information necessary to describethe required material. Examples of such information include,but are not limited to, th

24、e following:5.1.1 ASTM specification number and year of issue;5.1.2 Name of material and designation (cold-rolled steelsheet) (include grade, type, and class, as appropriate, for CS,DS, DDS, EDDS, SS, HSLAS, HSLAS-F, SHS, or BHS) (see4.1);5.1.2.1 When a type is not specified for CS or DS, Type Bwill

25、 be furnished (see 4.1);5.1.2.2 When a class is not specified for HSLAS, Class 1will be furnished (see 4.1);5.1.2.3 When a type is not specified for SS 33 230 and SS40 275, Type 1 will be furnished (see 4.1);5.1.3 Classification (either exposed, unexposed, temperrolled, or annealed last) (see 4.3);5

26、.1.4 Finish (see 9.1);5.1.5 Oiled or not oiled, as required (see 9.2);5.1.6 Dimensions (thickness, thickness tolerance table (see5.1.6.1), width, and whether cut lengths or coils);5.1.6.1 As agreed upon between the purchaser and theproducer, material ordered to this specification will be suppliedto

27、meet the applicable thickness tolerance table shown inSpecification A 568/A 568M;NOTE 2Not all producers are capable of meeting all the limitations ofthe thickness tolerance tables in Specification A 568/A 568M. The pur-chaser should contact the producer regarding possible limitations prior toplacin

28、g an order.5.1.7 Coil size (must include inside diameter, outside diam-eter, and maximum weight);5.1.8 Copper bearing steel (if required);5.1.9 Quantity;5.1.10 Application (part identification and description);5.1.11 Special requirements (if required), and5.1.12 A report of heat analysis will be sup

29、plied, if re-quested, for CS, DS, DDS, and EDDS. For materials withrequired mechanical properties, SS, HSLAS, HSLAS-F, SHS,and BHS, a report is required of heat analysis and mechanicalproperties as determined by the tension test.NOTE 3A typical ordering description is as follows: ASTM A1008-XX, cold

30、 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,thickness tolerance Table 18 of Specification A 568/A 568M, 100 000 lb,for part No. 4560, Door Panel.or:ASTM A 1008M-XX, cold-rolled steel sheet, SS grade 275, unexposed,

31、matte finish, oiled, 0.88 mm by 760 mm by 2440 mm, thickness toleranceTable A1.15 of Specification A 568/A 568M, 10 000 kg, for shelf bracket.6. General Requirements for Delivery6.1 Material furnished under this specification shall con-form to the applicable requirements of the current edition ofSpe

32、cificationA 568/A 568M unless otherwise provided herein.A 1008/A 1008M 08a27. Chemical Composition7.1 The heat analysis of the steel shall conform to thechemical composition requirements of the appropriate desig-nation shown in Table 1 for CS, DS, DDS, and EDDS and inTable 2 for SS, HSLAS, HSLAS-F,

33、SHS, and BHS.7.2 Each of the elements listed in Table 1 and Table 2 shallbe included in the report of the heat analysis. When the amountof copper, nickel, chromium, or molybdenum is less than0.02 %, report the analysis as 0.02 % or the actual determinedvalue. When the amount of vanadium, columbium,

34、or titaniumis less than 0.008 %, report the analysis as 0.008 % or theactual determined value. When the amount of boron is less than0.0005 %, report the analysis as 0.0005 % or the actualdetermined value.7.3 Sheet steel grades defined by this specification aresuitable for welding if appropriate weld

35、ing conditions areselected. For certain welding processes, if more restrictivecomposition limits are desirable, they shall be specified at thetime of inquiry and confirmed at the time of ordering.8. Mechanical Properties8.1 CS, DS, DDS, and EDDS:8.1.1 Typical nonmandatory mechanical properties for C

36、S,DS, DDS and EDDS are shown in Table 3.8.1.2 The material shall be capable of being bent, at roomtemperature, in any direction through 180 flat on itself withoutcracking on the outside of the bent portion (see Section 14 ofTest Methods and Definitions A 370). The bend test is not arequirement of de

37、livery. However, if testing is performed bythe purchaser, material not conforming to the requirement shallbe subject to rejection.8.1.3 Sheet of these designations except for EDDS aresubject to aging dependent upon processing factors such as themethod of annealing (continuous annealing or box anneal

38、ing),and chemical composition. For additional information onaging, see Appendix X1 of Specification A 568/A 568M.8.1.4 EDDS steel is stabilized to be nonaging and so is notsubject to stretcher strains and fluting. Other steels are pro-cessed to be nonaging; please consult your supplier.8.2 SS, HSLAS

39、, HSLAS-F, SHS, and BHS:8.2.1 The available strength grades for SS, HSLAS andHSLAS-F are shown in Table 4.8.2.2 The available strength grades for SHS and BHS areshown in Table 5.8.2.3 Tension Tests:8.2.3.1 RequirementsMaterial as represented by the testspecimen shall conform to the mechanical proper

40、ty require-ments specified in Table 4. These requirements do not apply tothe uncropped ends of unprocessed coils.8.2.3.2 Number of TestsTwo tension tests shall be madefrom each heat or from each 50 tons 45 000 kg. When theamount of finished material from a heat is less than 50 tons45 000 kg, one tes

41、t shall be made. When material rolled fromheat differs 0.050 in. 1.27 mm or more in thickness, onetension test shall be made from the thickest and thinnestmaterial regardless of the weight represented.8.2.3.3 Tension test specimens shall be taken at a pointimmediately adjacent to the material to be

42、qualified.8.2.3.4 Tension test specimens shall be taken from the fullthickness of the sheet.8.2.3.5 Tension test specimens shall be taken from a loca-tion approximately halfway between the center of the sheet andthe edge of the material as rolled.8.2.3.6 Tension test samples shall be taken with the

43、length-wise axis of the test specimen parallel to the rolling direction(longitudinal test).8.2.3.7 Test MethodYield strength shall be determined byeither the 0.2 % offset method or the 0.5 % extension underload method unless otherwise specified.8.2.3.8 Bake hardenable steel shall conform to bake har

44、d-ening index requirements included in Table 5 for the gradespecified. The method for measuring the bake hardening indexis described in Annex A1. Bake hardenable steel shall exhibita minimum increase in yield strength of 4 ksi 25 MPa asbased on the upper yield point or 3 ksi 20 MPa as based onthe lo

45、wer yield stress, after a prestrained specimen has beenexposed to a standard bake cycle (340F 170C) for 20 min.TABLE 1 Chemical CompositionAFor Cold Rolled Steel Sheet Designations CS, DS, DDS, and EDDS% Heat Analysis, Element Maximum Unless Otherwise ShownDesignation C Mn P S Al Si Cu Ni CrBMo V Cb

46、 TiCNBCS Type AD,E,F,G0.10 0.60 0.030 0.035 . . . . . . 0.20H0.20 0.15 0.06 0.008 0.008 0.025 . . . . . .CS Type BD0.02 to0.150.60 0.030 0.035 . . . . . . 0.20H0.20 0.15 0.06 0.008 0.008 0.025 . . . . . .CS Type CD,E,F,G0.08 0.60 0.10 0.035 . . . . . . 0.20H0.20 0.15 0.06 0.008 0.008 0.025 . . . . .

47、 .DS Type AE,I0.08 0.50 0.020 0.030 0.01 min . . . 0.20 0.20 0.15 0.06 0.008 0.008 0.025 . . . . . .DS Type B 0.02 to0.080.50 0.020 0.030 0.02 min . . . 0.20 0.20 0.15 0.06 0.008 0.008 0.025 . . . . . .DDSF,G0.06 0.50 0.020 0.025 0.01 min . . . 0.20 0.20 0.15 0.06 0.008 0.008 0.025 . . . . . .EDDSJ0

48、.02 0.40 0.020 0.020 0.01 min . . . 0.10 0.10 0.15 0.03 0.10 0.10 0.15 . . . . . .AWhere an ellipsis (. . .) appears in the table, there is no requirement, but the analysis result shall be reported.BChromium is permitted, at the producers option, to 0.25 % maximum when the carbon content is less tha

49、n or equal to 0.05 %.CFor steels containing 0.02 % or more carbon, titanium is permitted at the producers option, to the lesser of 3.4N + 1.5S or 0.025 %.DWhen 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.ESpecify Type B to avoid carbon levels below 0.02 %.FIt is permissible to furnish as a vacuum degassed or chemically stabilized steel, or both, at the producers option.GFor carbon levels less than or equal