ASTM_A_1088_-_13.pdf

Designation:A108813Standard Specification forSteel,Sheet,Cold-Rolled,Complex Phase(CP),Dual Phase(DP)and Transformation Induced Plasticity(TRIP)1This standard is issued under the fixed designation A1088;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers cold-rolled,complex phase(CP)grade,dual phase(DP)grade,and transformation inducedplasticity(TRIP)grade steel sheet in coils and cut lengths.1.2 Product furnished under this specification shall conformto the applicable requirements of the latest issue of Specifica-tion A568/A568M,unless otherwise provided herein.1.3 The product is available in a number of designations andgrades with mandatory chemical requirements and mandatorymechanical properties that are achieved through thermal orthermal-mechanical treatments,and are designed to be com-patible with automotive application requirements.1.4 The grade designation nomenclature of the productdiffers from other cold-rolled sheet products having mandatorymechanical properties in that ordering is to tensile,rather thanyield strength values.1.5 The text of this specification references notes andfootnotes that provide explanatory material.These notes andfootnotes,excluding those in tables and figures,shall not beconsidered as requirements of this specification.1.6 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.7 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.Some specifichazards statements are given in Section 7 on Hazards.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 forA941 Terminology Relating to Steel,Stainless Steel,RelatedAlloys,and FerroalloysE646 Test Method for Tensile Strain-Hardening Exponents(n-Values)of Metallic Sheet Materials3.Terminology3.1 DefinitionsSee Terminology A941 for definitions ofgeneral terminology relating to cold-rolled steel sheet products.3.2 Definitions:3.2.1 complex phase(CP)steel,nsteel sheet with aferritic/bainitic matrix containing small amounts of retainedaustenite or pearlite,or both where significant grain refinementis caused by retarded crystallization or precipitation of microal-loying elements.3.2.2 dual phase(DP)steel,nsteel sheet with a ferriticmatrix containing a martensitic phase present in the form ofislands.3.2.3 transformation induced plasticity(TRIP)steel,nsteel sheet with a mainly ferritic matrix containing retainedaustenite where,during the forming process,retained austenitecan transform to martensite.4.Classification4.1 The material is available in several designations andgrades as follows:4.1.1 Complex phase(CP)steel(Grades 600T/350Y,780T/500Y,and 980T/700Y),4.1.2 Dual phase(DP)steel(Grades 440T/250Y,490T/290Y,590T/340Y,780T/420Y,and 980T/550Y),and1This 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 Nov.1,2013.Published November 2013.DOI:10.1520/A1088-132For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1Copyright by ASTM Intl(all rights reserved);4.1.3 Transformation induced plasticity(TRIP)steel(Grades 690T/410Y and 780T/440Y).4.2 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 purchasers 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 following:5.1.1 ASTM specification number and year of issue;5.1.2 Name of product(steel sheet,cold-rolled);5.1.3 Designation of sheet CP(Grades 600T/350Y,780T/500Y,or 980T/700Y),DP(Grades 440T/250Y,490T/290Y,590T/340Y,780T/420Y,or 980T/550Y),or TRIP(Grades690T/410Y or 780T/440Y);5.1.4 Finish(see 8.1);5.1.5 Oiled or