1、Designation:A980/A980M11Standard Specification forSteel,Sheet,Carbon,Ultra High Strength Cold Rolled1This standard is issued under the fixed designation A980/A980M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revi
2、sion.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers a cold rolled ultra highstrength carbon steel sheet in coils or cut lengths.The productis available in fo
3、ur strength levels.The steels strength isobtained by water quenching from an austenitic temperatureresulting in a martensitic microstructure.This product isintended for miscellaneous applications where ultra highstrength,weight saving,and good weldability are important.1.2 The values stated in eithe
4、r 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 Document
5、s2.1 ASTM Standards:2A568/A568M Specification for Steel,Sheet,Carbon,Struc-tural,and High-Strength,Low-Alloy,Hot-Rolled andCold-Rolled,General Requirements for3.Ordering Information3.1 It is the purchasers responsibility to specify in thepurchase order all ordering information necessary to purchaset
6、he needed material.Examples of such information include,butare not limited to:3.1.1 ASTM specification number and year of issue,3.1.2 Name of material(cold rolled ultra high strength steelsheet),3.1.3 Grade(see Table 1),3.1.4 Specify oiled or not oiled as required,3.1.5 Dimensions(thickness,width an
7、d whether cut lengthsor coils),3.1.6 Coil size(must include inside diameter,outside diam-eter,and maximum mass),3.1.7 Quantity,3.1.8 Application(show part identification and description),3.1.9 Special Requirements(if required),and3.1.10 Cast or heat analysis report(request if required).4.Materials a
8、nd Manufacture4.1 Melting PracticeThis sheet shall be produced fromaluminum killed steel.4.2 AnnealingThe material shall be continuous annealedto austenitic temperatures and water quenched.5.General Requirements5.1 Materials furnished under this specification shall con-form to the applicable require
9、ments of the current edition ofSpecification A568/A568M unless otherwise provided herein.6.Chemical Composition6.1 The cast or heat analysis shall conform to the require-ments prescribed in Table 1 and Table 2.6.1.1 Each of the elements listed in Table 2 shall be includedin the report of the cast or
10、 heat analysis.Where the amount ofcopper nickel,chromium or molybdenum is less than 0.02%,the analysis may be reported as 0.02%.When the amount ofvanadium or columbium is less than 0.008%,the analysis maybe reported as 0.008%.7.Mechanical Properties7.1 Tension Tests:7.1.1 RequirementsMaterials as re
11、presented by the testspecimen shall conform to the tensile requirements specified inTable 3.7.1.2 Number of TestsTwo tests shall be made from eachheat or from each lot of 50 tons 45 000 kg.When the amountof finished material from a heat or lot is less than 50 tons45 000 kg,one test shall be made.Whe
12、n material rolled fromone heat differs by 0.050 in.1.27 mm or more in thickness,one tension test shall be made from the thickest and thinnestmaterial regardless of the weight represented.7.1.3 Location and Orientation:7.1.3.1 Tension test specimens shall be taken at a pointimmediately adjacent to th
13、e material to be qualified.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of Subcommit-teeA01.19 on Steel Sheet and Strip.Current edition approved Nov.1,2011.Published November 2011.Originallyapproved i
14、n 1997.Last previous edition approved in 2003 as A98097(2010).DOI:10.1520/A0980_A0980M-11.2For 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
15、page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1Copyright by ASTM Intl(all rights reserved);7.1.3.2 Tension test samples shall be taken from the fullthickness of the sheet as rolled.7.1.3.3 Tension test specimens sh
16、all be taken from a loca-tion approximately halfway between the center of the sheet andthe edge of the material as-rolled.7.1.4 Retests:7.1.4.1 A retest shall be permitted if the results of anoriginal tension specimen are within 2 ksi 15 MPa of therequired tensile strength.7.1.4.2 A retest shall consist of one random specimen fromthe same heat or lot as the original specimen.7.1.4.3 If the results of the retest specimen meet the speci-fied requirements,the cast or test lot shall be accepted.8.Fi