ASTM_A_856_-_A_856M_-_03_2014.pdf

Designation:A856/A856M03(Reapproved 2014)Standard Specification forZinc-5%Aluminum-Mischmetal Alloy-Coated Carbon SteelWire1This standard is issued under the fixed designation A856/A856M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.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 soft,medium,and hard temperzinc-5%aluminum-mischmetal(Zn-5 Al-MM)alloy-coatedcarbon steel wire in coils for general use.The product isintended for applications requiring corrosion resistance,drawability,and formability.1.2 This specification is applicable to orders in eitherinch-pound units(as A856)or acceptable SI units as A856M.Inch-pound units and SI units are not necessarily equivalent;therefore,each system shall be used independently of the other,without combining values in any way.1.3 This specification references notes and footnotes whichprovide explanatory material.These notes and footnotes(ex-cluding those in tables and figures)shall not be considered asrequirements of this specification.2.Referenced Documents2.1 ASTM Standards:2A90/A90M Test Method for Weight Mass of Coating onIron and Steel Articles with Zinc or Zinc-Alloy CoatingsA700 Practices for Packaging,Marking,and Loading Meth-ods for Steel Products for Shipment(Withdrawn 2014)3A902 Terminology Relating to Metallic Coated Steel Prod-uctsB117 Practice for Operating Salt Spray(Fog)ApparatusB750 Specification for GALFAN(Zinc-5%Aluminum-Mischmetal)Alloy in Ingot Form for Hot-Dip CoatingsE8 Test Methods for Tension Testing of Metallic MaterialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE47 Test Methods for Chemical Analysis of Zinc Die-Casting Alloys(Withdrawn 1997)3E1277 Test Method for Chemical Analysis of Zinc-5%Aluminum-Mischmetal Alloys by ICP Emission Spec-trometry2.2 Military Standards:4MIL-STD-129 Marking for Shipment and StorageMIL-STD-163 Steel Mill Products Preparation2.3 Federal Standards:4Fed Std.No.123 Marking for Shipment(Civil Agencies)2.4 Other Standards:5GF-1 Standard Practice for Determination of Cerium andLanthanum Compositions in Galfan Alloy(5Al-0.04%La-0.04%Ce-Ba1 SHG Zn)3.Terminology3.1 Definitions See Terminology A902 for definitions ofgeneral terminology relating to metallic coated steel products.4.Classification4.1 TemperThe wire is classified with regard to mechani-cal properties by temper,which is related to tensile strengthand stiffness.The temper designations are soft,medium,andhard.4.2 Coating ClassesZn-5AL-MM alloy coating on thewire is classified in a number of classes(1,3 or A,60,B,100,and C)(see Table 1).5.Ordering Information5.1 Orders for material under this specification shall includethe following information:5.1.1 Quantity(weight),5.1.2 Coated wire diameter,5.1.3 Class of coating(see 4.2)5.1.4 Temper(soft,medium,or hard)(see Table 2),5.1.5 Packaging requirements,and1This specification is under the jurisdiction of ASTM Committee A05 onMetallic-Coated Iron and Steel Products and is the direct responsibility ofSubcommittee A05.12 on Wire Specifications.Current edition approved Nov.1,2014.Published November 2014.Originallyapproved in 1986.Last previous edition approved in 2009 as A856/A856M-03(2009).DOI:10.1520/A0856_A0856M-03R14.2For 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.3The last approved version of this historical standard is referenced onwww.astm.org.4Available from Standardization Documents Order Desk,Bldg.4 Section D,700Robbins Ave.,Philadelphia,PA 191115094,Attn:NPODS5Available from International Lead Zinc Research Organization 2525 MeridianParkway,P.O.Box 12036,Research Triangle Park,NC 27709-2036.*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 States1 5.1.6 ASTM designation and year of issue,as A856-forinch-pound units or A856M-for SI units.NOTE1A typical ordering description is as follows:50 000 lb,0.120-in.diameter Zn-5 Al-MM alloy-coated wire,Coating Class 60,SoftTemper in 600-lb coils on tubular carriers toASTM A856-or 50 000kg,3.00-mm diameter Zn-5 Al-MM alloy-coated wire,Coating Class 1,Soft Temper in 1000-kg coils on tubular carriers to ASTM A856M-.6.Materials and Manufacture6.1 The steel from which the wire is produced shall be madeby any commercially accepted steelmaking process.6.2 Coating Bath AnalysisThe bath metal used in continu-ous hot-dip Zn-5 Al-MM alloy-coated wire shall meet thechemical composition limits specified in Specification B750.6.2.1 For a two-step coating operation where the firstcoating is zinc(hot-dip ga