1、Designation:A 752M 04METRICStandard Specification forGeneral Requirements for Wire Rods and Coarse RoundWire,Alloy Steel Metric1This standard is issued under the fixed designation A 752M;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revisio
2、n,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification covers general requirements for alloysteel rods and uncoated coarse round alloy wire in
3、coils that arenot required to meet hardenability band limits.1.2 In case of conflict,the requirements in the purchaseorder,on the drawing,in the individual specification,and inthis general specification shall prevail in the sequence named.NOTE1This specification is the metric counterpart of Specific
4、ationA 752.2.Referenced Documents2.1 ASTM Standards:2A 370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA 700 Practices for Packaging,Marking,and LoadingMethods for Steel Products for Domestic ShipmentA 751 Test Methods,Practices,and Terminology forChemical Analysis of Steel P
5、roductsA 919 Terminology Relating to Heat Treatment of MetalsE 29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE 112 Test Methods for Determining Average Grain Size2.2Military Standard:MIL-STD-163 Steel Mill Products,Preparation for Ship-ment and Stor
6、age32.3Federal Standard:Fed.Std.No.123 Marking for Shipment(Civil Agencies)32.4AIAG Standard:AIAGB-5 02.00 Primary Metals Identification Tag Applica-tion Standard43.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 alloy steelsteel is considered to be alloy steel whenthe maximum of
7、 the range given for the content of alloyingelements exceeds one or more of the following limits:manga-nese 1.65%,silicon 0.60%,copper 0.60%;or in which adefinite range or a definite minimum quantity of any of thefollowing elements is specified or required within the limits ofthe recognized field of
8、 constructional alloy steels:chromiumup to 3.99%,cobalt,columbium,molybdenum,nickel,tita-nium,tungsten,vanadium,zirconium,or any other alloyingelements added to obtain a desired alloying effect.3.1.1.1 Boron treatment of alloy steels,which are fine grain,may be specified to improve hardenability.3.1
9、.1.2 Other elements,such as lead,selenium,tellurium,orbismuth,may be specified to improve machinability.3.1.2 coarse round wirefrom 0.90 to 25 mm in diameter,inclusive,wire produced from hot-rolled wire rods or hot-rolled coiled rounds by one or more cold reductions primarilyfor the purpose of obtai
10、ning a desired size with dimensionalaccuracy,surface finish,and mechanical properties.By varyingthe amount of cold reduction and other wire mill practices,including thermal treatment,a wide diversity of mechanicalproperties and finishes are made available.Suggested wirediameters are shown in Table 1
11、.3.1.3 straightened and cut wirewire produced from coilsof wire by means of special machinery that straightens the wireand cuts it to a specified length.3.1.3.1 The straightening operation may alter the mechani-cal properties of the wire,especially the tensile strength.Thestraightening operation may
12、 also induce changes in the diam-eter of the wire.The extent of the changes in the properties ofthe wire after cold straightening depends upon the kind of wire1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibil
13、ity of SubcommitteeA01.03 on Steel Rod and Wire.Current edition approved March 1,2004.Published March 2004.Originallyapproved in 1983.Last previous edition approved in 2003 as A 752M 93(2003).2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at servic
14、eastm.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,700Robbins Ave.,Philadelphia,PA 19111-5094,Attn:NPODS.4Available from the Automotive Industry Action Gro
15、up,26200 Lahser,Suite200,Southfield,MI 48034.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.and also on the normal variation in the adjustments of thestraightening equipme
16、nt.It is therefore not possible to forecastthe properties of straightened and cutwire.Each kind of wireneeds individual consideration.In most cases,the applicationof straightened and cut wire is not seriously influenced by thesechanges.3.1.4 wire rodsrods that are hot rolled from billets into anapproximate round cross section and into coils of one continu-ous length.Rods are not comparable to hot-rolled bars inaccuracy of cross section or surface finish and as a semi-finished product are primari
