ASTM_A_1011_-_A_1011M_-_17.pdf

Designation:A1011/A1011M17Standard Specification forSteel,Sheet and Strip,Hot-Rolled,Carbon,Structural,High-Strength Low-Alloy,High-Strength Low-Alloy with ImprovedFormability,and Ultra-High Strength1This standard is issued under the fixed designation A1011/A1011M;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 hot-rolled,carbon,structural,high-strength low-alloy,high-strength low-alloy with im-proved formability,and ultra-high strength steel sheet and strip,in coils and cut lengths.1.2 Hot rolled steel sheet and strip is available in thedesignations as listed in 4.1.1.3 This specification is not applicable to the steel coveredby Specification A635/A635M.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.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2A370 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 forA635/A635M Specification for Steel,Sheet and Strip,Heavy-Thickness Coils,Hot-Rolled,Alloy,Carbon,Structural,High-Strength Low-Alloy,and High-StrengthLow-Alloy with Improved Formability,General Require-ments forA749/A749M Specification for Steel,Strip,Carbon andHigh-Strength,Low-Alloy,Hot-Rolled,General Require-ments forA751 Test Methods,Practices,and Terminology for Chemi-cal Analysis of Steel ProductsA941 Terminology Relating to Steel,Stainless Steel,RelatedAlloys,and FerroalloysE18 Test Methods for Rockwell Hardness of Metallic Ma-terials3.Terminology3.1 DefinitionsFor definitions of other terms used in thisspecification refer to Terminology A941.3.2 Definitions of Terms Specific to This Standard:3.2.1 aging,nloss of ductility with an increase inhardness,yield strength,and tensile strength that occurs whensteel,which has been slightly cold worked(such as by temperrolling)is stored for some time.3.2.1.1 DiscussionAging also increases the tendency to-ward stretcher strains and fluting.3.2.2 inclusion control,nthe process of reducing thevolume fraction of inclusions or modifying the shape ofinclusions to improve formability,weldability,and machinabil-ity.3.2.2.1 DiscussionInclusions,especially those elongatedduring the rolling process,create the conditions for initiating orpropagating cracks when the material is stretched or bentduring the manufacture of a part(or both).The adverse effectsof inclusions are minimized by reducing the content ofinclusions in the steel or by altering the shape of inclusionsthrough the use of additions during the steelmaking processthat change the elongated shape of the inclusions to lessharmful small,well dispersed globular inclusions(or both).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 1,2017.Published June 2017.Originallyapproved in 2000.Last previous edition approved in 2015 as A1011/A1011M 15.DOI:10.1520/A1011_A1011M-17.2For 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.*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 StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 3.2.3 stabilization,naddition of one or more nitride orcarbide forming elements,or both,such as titanium andcolumbium,to control the level of the interstitial elementscarbon and nitrogen in the steel.3.2.3.1 DiscussionStabilization improves formability andincreases resistance to aging.3.2.4 vacuum dega