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ASTM A1008 - A 1008M - 15.pdf

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ASTM A1008 - A 1008M - 15.pdf

Designation A1008/A1008M − 15Standard 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 immediately 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.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope*1.1 This 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 specification 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 other. Combiningvalues from the two systems may result in non-conformancewith the standard.2. Referenced Documents2.1 ASTM Standards2A109/A109M Specification for Steel, Strip, Carbon 0.25Maximum Percent, Cold-RolledA370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA568/A568M Specification for Steel, Sheet, Carbon,Structural, and High-Strength, Low-Alloy, Hot-Rolled andCold-Rolled, General Requirements forA941 Terminology Relating to Steel, Stainless Steel, RelatedAlloys, 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 Exponentsn -Values of Metallic Sheet Materials3. Terminology3.1 Definitions of Terms Specific to This Standard3.1.1 For definitions of other terms used in thisspecification, refer to Terminology A941.3.1.2 aging, nloss of ductility with an increase inhardness, yield strength, and tensile strength that occurs whensteel that has been slightly cold worked such as by temperrolling is stored for some time.3.1.2.1 DiscussionAging increases the tendency of a steelto exhibit stretcher strains and fluting.3.1.3 bake hardenable steel, nsteel in which significantaging is realized when moderate heat treatment, such as thatused for 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 process, create the conditions for initiating orpropagating cracks, or both, 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 or by altering the shape of inclusions, or both,through the use of additions during the steelmaking processthat change the elongated shape of the inclusions to lessharmful small, well dispersed globular inclusions.3.1.5 solid-solution hardened steel or solution hardenedsteel, nsteel 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 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.1This specification is under 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 May 1, 2015. Published May 2015. Originallyapproved in 2000. Last previous edition approved in 2013 as A1008/A1008M – 13.DOI 10.1520/A1008_A1008M-15.2For 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 standard’s Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States13.1.6 stabilization, naddition of one or 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 degassing, nprocess of refining liquid steelin which 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 followingdesignations4.1.1 Commercial Steel CS Types A, B, and C,4.1.2 Commercial Steel CS TypesAand B combined withchemistry grade per Specification A568/A568M Table X2.3,4.1.3 Drawing Steel DS Types A and B, as specified inTable 1,4.1.4 Drawing Steel DS Type A and B combined withchemistry grade per Specification A568/A568M Table X2.3,4.1.5 Commercial Steel Chemistry grade per SpecificationA568/A568M Table X2.1, with no type specified CS – 1005,CS – 1008, CS – 1020, and so forth,4.1.6 Deep Drawing Steel DDS,4.1.7 Extra Deep Drawing Steel EDDS,4.1.8 Structural Steel SS grades 25[170], 30[205], 33[230]Types 1 and 2, 40[275] Types 1 and 2, 45[310], 50[340],60[410], 70[480], and 80[550].4.1.9 High-Strength Low-Alloy Steel HSLAS, in classes 1and 2, in grades 45[310], 50[340]. 55[380], 60[410], 65[450],and 70[480] in Classes 1 and 2, and4.1.10 High-Strength Low-Alloy Steel with ImprovedFormability HSLAS-F grades 50[340], 60[410], 70[480], and80[550].4.1.10.1 HSLAS-F steel has improved formability whencompared to HSLAS. The steel is fully deoxidized, made tofine grain practice and includes microalloying elements such ascolumbium, vanadium, zirconium, and so forth. The steel shallbe treated to achieve inclusion control.4.1.11 Solution hardened steel SHS, and4.1.12 Bake hardenable 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 specified 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 purchaser’s responsibility to specify in thepurchase order all ordering information necessary to describethe required material. Examples of such information include,but are not limited to, the following5.1.1 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 Chemistry grade is specified per Specifica-tion A568/A568M Table X2.3, the grade shall be furnished asCS Type B – 1008, DS Type A – 1005, and so forth,5.1.2.2 When a Chemistry grade is specified per Specifica-tion A568/A568M Table X2.1, with no reference to CS TypeA,CS Type B, DS Type A, or DS Type B, the grade shall befurnished as CS – 1005, CS – 1008, CS – 1020, and so forth,and meet chemistry specified per Specification A568/A568MTable X2.1,5.1.2.3 When a type is not specified for CS or DS and thereis no reference to a chemistry grade such as 1005, 1006, and soforth, Type B will be furnished see 4.1;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 0.025 0.035 . . . . . . 0.20H0.20 0.15 0.06 0.008 0.008 0.025 . . . . . .CS Type BD0.02 to0.150.60 0.025 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 0.020 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 0.020 0.02 min . . . 0.20 0.20 0.15 0.06 0.008 0.008 0.025 . . . . . .DDSF,G0.06 0.50 0.020 0.020 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 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 producer’s option, to 0.25 maximum when the carbon content is less than or equal to 0.05 .CFor 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 .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 producer’s option.GFor carbon levels less than or equal to 0.02 , it is permissible to use vanadium, columbium or titanium, or a combination thereof, as stabilizing elementsattheproducer’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.HWhen copper steel is specified, the copper limit is a minimum requirement. When copper steel is not specified, the copper limit is a maximum requirement.IIf produced utilizing a continuous anneal process, stabilized steel is permissible at the producer’s option, and Footnotes F and G apply.JShall be furnished as a vacuum degassed and stabilized steel.A1008/A1008M − 1525.1.2.4 When a class is not specified for HSLAS, Class 1will be furnished see 4.1;5.1.2.5 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;5.1.4 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 1Not all producers are capable of meeting all the limitations ofthe 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, outsidediameter, 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 A report of heat analysis will be supplied, ifrequested, 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, and5.1.12 Special requirements if any.5.1.12.1 When the purchaser requires thickness tolerancesfor3⁄8 in. [10 mm] minimum edge distance see SupplementaryRequirement in Specification A568/A568M, this requirementshall be specified in the purchase order or contract.5.1.12.2 Tighter requirements can be specified based onagreement between seller and purchaser.NOTE 2A typical ordering description is as follows ASTM A1008-XX, cold rolled steel sheet, CS TypeA, exposed, matte finish, oiled, 0.035by 30 in. by coil, ID 24 in., OD 48 in., max weight 15 000 lbs, 100 000lb, for part No. 4560, Door Panel.orASTM 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 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.7. 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 Tables 1 and 2, andSpecification A568/A568M Table X2.3 shall be included in thereport of the heat analysis. When the amount of copper, nickel,chromium, or molybdenum is less than 0.02 , report theanalysis as 0.02 or the actual determined value. When theamount of vanadium, columbium, or titanium is less than0.008 , report the analysis as 0.008 or the actual deter-mined value. When the amount of boron is less than 0.0005 ,report the analysis as 0.0005 or the actual determinedvalue.7.3 Sheet steel grades defined by this specification aresuitable for welding if appropriate welding 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 EDDS8.1.1 Typical nonmandatory mechanical properties for CS,DS, DDS, EDDS, and Specification A568/A568M Table X2.3are shown in Table 3.8.1.2 The material represented by all grades specified inTable 1 and Specification A568/A568M Table X2.3 shall becapable of being bent, at room temperature, in any directionthrough 180 flat on itself without cracking on the outside ofthe bent portion see Section 14 of Test Methods and Defini-tions A370. The bend test is not a requirement of delivery.However, if testing is performed by the purchaser, material notconforming to the requirement shall be 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 onaging, 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 BHS8.2.1 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 Tests8.2.3.1 RequirementsMaterial as represented by the testspecimen shall conform to the mechanical property 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

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