ASTM_A_764_-_07_2012.pdf

Designation:A76407(Reapproved 2012)Standard Specification forMetallic Coated Carbon Steel Wire,Coated at Size andDrawn to Size for Mechanical Springs1This standard is issued under the fixed designation A764;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.This standard has been approved for use by agencies of the Department of Defense.1.Scope*1.1 This specification covers two finishes of round,metalliccoated,hard-drawn,carbon steel spring wire having propertiesand quality for the manufacture of mechanical springs and wireforms that are not subject to high stress or require high fatigueproperties.1.2 The values stated in inch-pound units are to be regardedas the standard.The values stated in SI units are for informa-tion purposes only.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 Mechanical Testingof Steel ProductsA428/A428M Test Method for Weight Mass of Coating onAluminum-Coated Iron or Steel ArticlesA510 Specification for General Requirements for Wire Rodsand Coarse Round Wire,Carbon SteelA700 Practices for Packaging,Marking,and Loading Meth-ods for Steel Products for ShipmentA751 Test Methods,Practices,and Terminology for Chemi-cal Analysis of Steel ProductsB6 Specification for ZincB750 Specification for GALFAN(Zinc-5%Aluminum-Mischmetal)Alloy in Ingot Form for Hot-Dip CoatingsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 U.S.Government Standards:3Fed.Std.No.123 Marking for Shipment(Civil Agencies)MIL-STD-129 Marking for Shipment and Storage2.3 Automotive Industry Action Group Standard:4AIAG B-5 02.00 Primary Metals Identification Tag Applica-tion Standard3.Terminology3.1 Definitions:3.1.1 coating class(regular,1,or 3)specifies the mini-mum coating weight per unit area of uncoated wire surface.Aluminum coated wire is only specified in one class.3.1.2 coating finish(1 or 2)specifies whether a coating isapplied prior to or after the final cold drawing operation.3.1.3 coating type(A,B,or C)specifies the required alloycontent of the coating.3.1.4 tensile class(I or II)specifies the tensile range towhich the wire is to conform.4.Ordering Information4.1 Orders for material under this specification shouldinclude the following information:4.1.1 Quantity(weight),4.1.2 Diameter,finish,class of coating if applicable,type ofmetallic coating,class of tensile strength,name of material,4.1.3 ASTM designation and date of issue,4.1.4 Packaging(Section 15),4.1.5 Cast or heat analysis report,if desired(Section 6),and4.1.6 Test report,if desired(Section 14).NOTE1A typical ordering description is as follows:30 000 lb 0.120in.Finish 2,Class 1,Type B Metallic Coating,Tensile Class II,SteelMechanical Spring Wire in 400-lb,22-in.coils to ASTM A764,dated.5.Materials and Manufacture5.1 The base metal of the wire shall be of good commercialquality steel.The steel may be either ingot cast or strand cast.1This specification is under the jurisdiction of ASTM Committee A05 onMetallic-Coated Iron and Steel Products and is under the direct responsibility ofSubcommittee A05.12 on Wire Specifications.Current edition approved Sept.1,2012.Published October 2012.Originallyapproved in 1979.Last previous edition approved in 2007 as A764 07.DOI:10.1520/A0764-07R12.2For 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.3Available from Standardization Documents Order Desk,Bldg.4,Section D,700 Robbins Ave.,Philadelphia,PA 19111-5094,ATTN:NPODS.4Available from Automotive Industry Action Group,26200 Lahser Rd.,Suite200,Southfield,MI 48034,www.aiag.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 19428-2959.United States1 5.2 A sufficient discard shall be made to ensure freedomfrom injurious piping and undue segregation.5.3 The wire shall be cold drawn to produce the desiredmechanical properties.5.4 Each coil shall be of one continuous length.Only weldsmade prior to cold drawing are permitted,unless otherwiseagreed upon at the time of the purchase or contract.5.5 The material shall be metallic coated prior to colddrawing,or at an intermediate stage of cold drawing(Finish 1),or shall be metallic coated after the final cold drawing(Finish2).5.6 The wire shall be furnished with one of three types ofmetallic coating,as specified:5.6.1 Type AAluminum coated(aluminized),5.6.2 Type BZinc coated(galvanized),or5.6.3 Type CZinc-5%aluminum-mischmetal(Zn