1、Designation:A95916Standard Guide forSpecifying Harmonized Standard Grade Compositions forWrought Stainless Steels1This standard is issued under the fixed designation A959;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of la
2、st revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This guide provides a guide to ASTM SubcommitteesA01.06,A01.10,A01.17,A01.22,and A01.28 for specifyingchemical composition l
3、imits of wrought stainless steels.It isintended that these recommended grade composition limits besuitable for adoption by other standardization bodies thatprepare standards for stainless steel products.1.2 Included in this guide are the recommendations fordetermining the number of significant figur
4、es for specifyingchemical composition from Test Methods,Practices,and Ter-minology A751.1.3 All stainless steel UNS numbers and the stainless steelgrades in all standards overseen by the aforementioned ASTMsubcommittees have been included,except those grades appli-cable to restricted special end use
5、s and alloys containing lessthan 10.5%minimum chromium.1.4 Not addressed are minor composition modificationswhich a specific product subcommittee may find necessary toaccommodate effects of normal processing or to enhancefabricability by the producer or user,or both.1.5 Also not generally addressed(
6、except when establishedbyASTM product subcommittees)is a complete rationalizationof all limits,especially when such would conflict with long-standing practices and is not justified by special technicaleffect.1.6 Excluded from this guide are cast material and weldingfiller metal.2.Referenced Document
7、s2.1 ASTM Standards:2A751 Test Methods,Practices,and Terminology for Chemi-cal Analysis of Steel ProductsE527 Practice for Numbering Metals and Alloys in theUnified Numbering System(UNS)2.2 SAE Standards:3J 1086 Recommended Practice for Numbering Metals andAlloysHS-1086 Metals and Alloys in the Unif
8、ied Numbering Sys-tem3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 austenitic grade,nmetallurgical term meaning thatthe material is usually predominantly face-centered cubic instructure and hardenable only by cold working.3.1.2 austenitic-ferritic(duplex)grade,nmetallurgicalt
9、erm meaning that the material is a mixture of austenitic andferritic structures,with at least one-fourth of the lesser phase,and hardenable only by cold working.3.1.3 ferritic grade,nmetallurgical term meaning that thematerial is body-centered cubic in structure(with little,if any,tempered martensit
10、e)and hardenable only slightly by coldworking(responding little or only slightly to conventional heattreatment by quenching and tempering).3.1.4 martensitic grade,nmetallurgical term meaning thatthe material is capable of being produced in a distortedbody-centered cubic structure by conventional hea
11、t treatingand quenching,and that the quenched structure is capable ofconventional tempering.Martensitic grades are delivered in theannealed(ferritic)condition or the hardened and tempered(martensitic)condition.3.1.5 precipitation hardening grade,nmetallurgical termmeaning that the material may be ba
12、sically austenitic ormartensitic in structure and hardenable by precipitation hard-ening(sometimes called age hardening).3.1.6 standard stainless steel grade,nlisted chemicalcomposition associated with a stainless steel grade identifiedby a particular UNS number appearing in SAE publicationHS-1086,e
13、xcept as modified by an ASTM subcommittee1This guide is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloysand is the direct responsibility of SubcommitteeA01.17 on Flat-Rolled and Wrought Stainless Steel.Current edition approved Sept.1,2016.Published October 201
14、6.Originallyapproved in 1996.Last previous edition approved in 2011 as A959 11.DOI:10.1520/A0959-16.2For 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 Documen
15、t Summary page onthe ASTM website.3Available from Society of Automotive Engineers(SAE),400 CommonwealthDr.,Warrendale,PA 15096-0001,http:/www.sae.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 1
16、9428-2959.United States1 having oversight of a wrought stainless steel product wheresuch a modification is justified by a specific technical effect.4.Significance and Use4.1 It is anticipated that the ASTM Subcommittees A01.06,A01.10,A01.17,A01.22,and A01.28 will use the standardcomposition limits listed in this guide for the grades identifiedby the corresponding UNS designation in the product specifi-cation unless there is a specific technical justification for doingotherwise.The compositions i