1、Designation:A107917Standard Specification forSteel Sheet,Complex Phase(CP),Dual Phase(DP)andTransformation Induced Plasticity(TRIP),Zinc-Coated(Galvanized)or Zinc-Iron Alloy-Coated(Galvannealed)bythe Hot-Dip Process1This standard is issued under the fixed designation A1079;the number immediately fol
2、lowing 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.Scope*1.1 This specification co
3、vers steel sheet,complex phase(CP)grade,dual phase(DP)grade,and transformation inducedplasticity(TRIP)grade,zinc-coated(galvanized)or zinc-ironalloy-coated(galvannealed)by the hot-dip process in coils andcut lengths.1.2 The product is produced in various zinc or zinc-ironalloy-coating masses or coat
4、ing designations as shown in Table1.1.3 Product furnished under this specification shall conformto the applicable requirements of the latest issue of Specifica-tion A924/A924M,unless otherwise provided herein.1.4 The product is available in a number of designations andgrades with mandatory chemical
5、requirements and mandatorymechanical properties that are achieved through thermal orthermal-mechanical treatments,and are designed to be com-patible with automotive application requirements.1.5 The grade designation nomenclature of the productdiffers from other hot-dip sheet products having mandator
6、ymechanical properties in that ordering is to tensile,rather thanyield strength values.1.6 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.7 The text of this specification references notes andfootnotes that provide explanatory
7、material.These notes andfootnotes,excluding those in tables and figures,shall not beconsidered as requirements of this specification.1.8 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 establis
8、h appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A90/A90M Test Method for Weight Mass of Coating onIron and Steel Articles with Zinc or Zinc-Alloy CoatingsA370 Test Methods and Definitions for
9、 Mechanical Testingof Steel ProductsA902 Terminology Relating to Metallic Coated Steel Prod-uctsA924/A924M Specification for General Requirements forSteel Sheet,Metallic-Coated by the Hot-Dip ProcessD7396 Guide for Preparation of New,Continuous Zinc-Coated(Galvanized)Steel Surfaces for PaintingE646
10、Test Method for Tensile Strain-Hardening Exponents(n-Values)of Metallic Sheet MaterialsB6 Specification for ZincB852 Specification for Continuous Galvanizing Grade(CGG)Zinc Alloys for Hot-Dip Galvanizing of SheetSteel3.Terminology3.1 DefinitionsSee Terminology A902 for definitions ofgeneral terminol
11、ogy relating to metallic-coated hot-dip prod-ucts.3.2 Definitions of Terms Specific to This Standard: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 crys
12、tallization 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.1This test method is under the jurisdiction of ASTM Committee A05 onMetallic-Coated Iron and Steel Products and is the dir
13、ect responsibility ofSubcommittee A05.11 on Sheet Specifications.Current edition approved Jan.1,2017.Published January 2017.Originallyapproved in 2012.Last previous edition approved in 2013 as A1079-132.DOI:10.1520/A1079-17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact
14、 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 Conshohoc
15、ken,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 Organizati
16、on Technical Barriers to Trade(TBT)Committee.1 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.3.2.4 zinc-iron alloy,na dull grey coating with no spanglepattern that is produced on hot-dip zinc-coated steel sheet.3.2.4.1 DiscussionZinc-iron alloy coating is composedentirely of inter-metallic alloys.It is typically produced bysubjecting the hot-