1、Designation: A1008/A1008M 09aStandard 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 A1008/A1008M; the number immediat
2、ely 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 This sp
3、ecification 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 specificat
4、ion does not apply to steel strip asdescribed in Specification A109/A109M.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 the othe
5、r. Combiningvalues from the two systems may result in non-conformancewith the standard.2. Referenced Documents2.1 ASTM Standards:2A109/A109M Specification for Steel, Strip, Carbon (0.25Maximum Percent), Cold-RolledA366/A366M Specification for Commercial Steel (CS)Sheet, Carbon (0.15 Maximum Percent)
6、 Cold-Rolled3A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA568/A568M Specification for Steel, Sheet, Carbon, Struc-tural, and High-Strength, Low-Alloy, Hot-Rolled andCold-Rolled, General Requirements forA620/A620M Specification for Drawing Steel (DS), Sheet,Carbon, Cold-R
7、olled3A941 Terminology Relating to Steel, Stainless Steel, Re-lated Alloys, and FerroalloysE18 Test Methods for Rockwell Hardness of Metallic Ma-terialsE517 Test Method for Plastic Strain Ratio r for Sheet MetalE646 Test Method for Tensile Strain-Hardening Exponents(n -Values) of Metallic Sheet Mate
8、rials3. 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 A941.3.1.2 agingloss of ductility with an increase in hardness,yield strength, and tensile strength that occurs when steel thathas been slightl
9、y 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 paint baking, f
10、ollows 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 process, create t
11、he conditions for initiatingand/or propagating cracks when the material is stretched orbent during the manufacture of a part. The adverse effects ofinclusions are minimized by reducing the content of inclusionsin the steel and/or by altering the shape of inclusions through1This specification is unde
12、r the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.19 on Steel Sheet and Strip.Current edition approved Nov. 1, 2009. Published December 2009. Originallyapproved in 2000. Last previous edition approved in 2009 as A
13、1008/A1008M 09.DOI: 10.1520/A1008_A1008M-09A.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn. The
14、last approved version of this historical standard is referencedon www.astm.org.1*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.the use of additions during the steelmak
15、ing process that changethe elongated shape of the inclusions to less harmful small,well dispersed globular 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 crystallinestruct
16、ure of steels.3.1.5.1 DiscussionAlloying elements that form a solid-solution with iron provide strengthening 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
17、more nitride- orcarbide-forming elements, or both, such as titanium andcolumbium, to control the level 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
18、steel inwhich the liquid is exposed to a vacuum as part of a specialtechnique for removing impurities 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
19、 B),NOTE 1CS Type B and DS Type B describe the most commonproduct previously included, respectively, in Specifications A366/A366Mand A620/A620M.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
20、, 50340, 60410,70480, and 80550).4.1.6 High-Strength Low-Alloy Steel (HSLAS, in classes 1and 2, 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
21、steel has improved formability whencompared to HSLAS. The steel is fully deoxidized, made tofine 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 ha
22、rdenable steel (BHS).4.2 When required for HSLAS and HSLAS-F steels, limi-tations on the use of 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 s
23、pecified either “temper rolled” or “annealed last.” Fordetails on processing, attributes and limitations, and inspectionstandards, refer to Specification A568/A568M.5. Ordering Information5.1 It is the purchasers responsibility to specify in thepurchase order all ordering information necessary to de
24、scribethe required material. Examples of such information include,but are not limited to, the 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,
25、HSLAS-F, SHS, or BHS) (see4.1);5.1.2.1 When a type is not specified for CS or DS, Type Bwill 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);
26、5.1.3 Classification (either exposed, unexposed, temperrolled, or annealed last) (see 4.3);5.1.4 Finish (see 9.1);5.1.5 Oiled or not oiled, as required (see 9.2);5.1.6 Dimensions (thickness, width, and whether cut lengthsor coils);NOTE 2Not all producers are capable of meeting all the limitations of
27、the thickness tolerance tables in Specification A568/A568M. The pur-chaser should contact the producer regarding possible limitations prior toplacing 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
28、;5.1.10 Application (part identification and description);5.1.11 A report of heat analysis will be supplied, 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
29、determined by the tension test, and5.1.12 Special requirements (if any).5.1.12.1 When the purchaser requires thickness tolerancesfor38 in. 10 mm minimum edge distance (see SupplementaryRequirement in Specification A568/A568M), this requirementshall be specified in the purchase order or contract.NOTE
30、 3A typical ordering description is as follows: ASTM A1008-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, un
31、exposed,matte finish, oiled, 0.88 mm by 760 mm by 2440 mm, 10 000 kg, for shelfbracket.6. General Requirements for Delivery6.1 Material furnished under this specification shall con-form to the applicable requirements of the current edition ofSpecification A568/A568M unless otherwise provided herein.
32、A1008/A1008M 09a27. 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, SHS, and BHS.7.2 Each of the elements listed in Table 1 an
33、d 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, or titaniumis less than 0.008 %, report the analysis as 0.
34、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 welding conditions areselected. For certain welding processes,
35、 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 CS,DS, DDS and EDDS are shown in Table 3.8.1.2 The material
36、 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 A370). The bend test is not arequirement of delivery. However, if testing is performed bythe purchaser, m
37、aterial 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 annealing),and chemical composition. For additional information o
38、naging, see Appendix X1 of Specification A568/A568M.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, HSLAS-F, SHS, and BHS:8.2.1 The available strength grades f
39、or 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 property require-ments specified in Table 4. These requirements do
40、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 test shall be made. When material rolled fromheat differs 0.050
41、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 qualified.8.2.3.4 Tension test specimens shall be taken from
42、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 length-wise axis of the test specimen parallel to the rolling
43、 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 hard-ening index requirements included in Table 5 for the grades
44、pecified. 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 lower yield stress, after a prestrained specimen has beenexpose
45、d 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 TiCNBCS Type AD,E,F,G0.10 0.60 0.030 0.035 . . . . . . 0.20H
46、0.20 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 . . . . . .DS Type AE,I0.08 0.50 0.020 0.030 0.01 min . . . 0.20 0.20
47、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 . . . . . .EDDSJ0.02 0.40 0.020 0.020 0.01 min . . . 0.10 0.10 0.15 0.03 0.10
48、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 than or equal to 0.05 %.CFor steels containing 0.02 % or more ca
49、rbon, 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 to 0.02 %, it is permissible to use vanadium, columbium o
