ASTM_A_407_-_07_2013.pdf

Designation:A40707(Reapproved 2013)Standard Specification forSteel Wire,Cold-Drawn,for Coiled-Type Springs1This standard is issued under the fixed designation A407;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 round,cold-drawn,steel springwire having properties and quality intended for the manufac-ture of the following types of upholstery springs:1.1.1 Type ACoiled(Marshall pack),1.1.2 Type BCoiled and knotted,1.1.3 Type CCoiled and knotted(offset style),1.1.4 Type DCoiled and hooked(single and crosshelicals),1.1.5 Type ECoiled and hooked(short tensionregulartensile strength),1.1.6 Type FCoiled and hooked(short tensionhightensile strength),1.1.7 Type GRegular lacing,1.1.8 Type HAutomatic lacing,1.1.9 Type IZig-zag(U-formed),1.1.10 Type JSquare-formed,and1.1.11 Type KSinuous for furniture spring units.1.2 These types of upholstery springs are used in themanufacture of automotive seat springs,furniture springs,bedspring units,mattresses,furniture cushions,and automobileseats.This wire is not intended for the manufacture ofmechanical springs.2.Referenced Documents2.1 ASTM Standards:2A370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA700 Practices for Packaging,Marking,and Loading Meth-ods for Steel Products for ShipmentE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications2.2 AIAG Standard:AIAGB-5 02.00 Primary Metals Identification Tag Applica-tion Standard33.Ordering Information3.1 Orders for material under this specification shouldinclude the following information for each ordered item:3.1.1 Quantity(weight),3.1.2 Name of material(name of specific type required)(Section 1 and Table 1),3.1.3 Diameter(Table 2),3.1.4 Packaging,marking,and loading(Section 12),3.1.5 ASTM designation and date of issue,and3.1.6 Heat(cast)analysis(if desired).NOTE1A typical ordering description is as follows:50 000 lb15 000 kg,cold-drawn upholstery spring wire Type B for coiling andknotting,size 0.080 in.2.0 mm,1500-lb 700 kg coils on tubularcarriers to ASTM A407 dated.4.Manufacture4.1 The steel shall be made by any of the followingprocesses:open-hearth,basic-oxygen,or electric-furnace.4.2 A sufficient discard shall be made to ensure freedomfrom injurious piping and undue segregation.4.3 The wire shall be cold-drawn to produce the desiredmechanical properties.5.Chemical Composition5.1 Upholstery spring wire for coiled-type springs is cus-tomarily produced within the chemical ranges shown below.Chemical composition and processing may vary depending onthe gage of wire and specific use.Carbon,%0.45 to 0.70AManganese,%,0.60 to 1.20APhosphorus,max,%0.040Sulfur,max,%0.050AIn any lot in which all the wire is of the same size and type,and submitted forinspection at the same time,the carbon content shall not vary more than 0.20%,and the manganese content shall not vary more than 0.30%.5.2 An analysis of each heat(cast)shall be made by theproducer to determine the percentage of elements specified1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.03 on Steel Rod and Wire.Current edition approved April 1,2013.Published April 2013.Originallyapproved in 1957.Last previous edition approved in 2007 as A407 07.DOI:10.1520/A0407-07R13.2For 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 Automotive Industry Action Group(AIAG),26200 Lahser Rd.,Suite 200,Southfield,MI 48033-7100,www.aiag.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1Copyright by ASTM Intl(all rights reserved);above.The analysis shall be made from a test sample prefer-ably taken during the pouring of the heat(cast).The chemicalcomposition thus determined shall be reported to the purchaseror his representative upon request.6.Mechanical Properties6.1 Tension Test:6.1.1 RequirementsThe material as represented by tensiontest specimens shall conform to the requirements prescribed inTable 1 for the various sizes and specified types.6.1.2 Number of TestsOne test specimen shall be taken foreach ten coils,or fraction thereof,in a lot.Each heat in a givenlot shall be tested.6.1.3 Location of TestsTest specimens shall be taken fromeither end of the coil.TABLE 1 Tensile Strength RequirementsADiameter,in.mmWireGageTensile Strength,ksi MPaminmaxType A,Marshall Pack0.0481.218255 1800295 20600.0541.417250 1760290 20100.0621.616250 1710290 19500.0721.815240 1680280 19200.0802.014230 165027