1、Designation:A57690b(Reapproved 2012)Standard Specification forSteel Bars,Carbon,Hot-Wrought,Special Quality1This standard is issued under the fixed designation A576;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last rev
2、ision.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.Scope1.1 This specification covers hot-wrought special qual
3、itycarbon steel bars.Special quality bar applications includeforging,heat treating,cold drawing,machining,and manystructural uses.A guide for the selection of steel bars iscontained in Practice A400.1.2 The bars shall be furnished in the grades specified inTable 1.Sections and sizes of bar steel ava
4、ilable are covered inSpecification A29/A29M.Hot-wrought special quality carbonsteel bars are produced in cut lengths and coils;the manufac-turer should be consulted regarding sections and sizes availablein coils,produced to a chemical composition.1.3 Merchant quality hot-wrought carbon steel bars ar
5、ecovered in Specification A575.1.4 Some end uses may require superior surface quality,orspecial chemical restrictions,metallurgical characteristics,heattreatment,or surface finishes which the purchaser may obtainby designating one or more of the available SupplementaryRequirements.1.5 The values sta
6、ted in inch-pound units are to be regardedas standard.2.Referenced Documents2.1 ASTM Standards:2A29/A29M Specification for Steel Bars,Carbon and Alloy,Hot-Wrought,General Requirements forA400 Practice for Steel Bars,Selection Guide,Composition,and Mechanical PropertiesA575 Specification for Steel Ba
7、rs,Carbon,Merchant Qual-ity,M-GradesE45 Test Methods for Determining the Inclusion Content ofSteelE527 Practice for Numbering Metals and Alloys in theUnified Numbering System(UNS)2.2 SAE Standard:SAE J 1086 Recommended Practice for Numbering Metalsand Alloys(UNS)33.Ordering Information3.1 Orders und
8、er this specification should include the fol-lowing,as required,to describe adequately the desired mate-rial:3.1.1 Quantity(weight or number of bars),3.1.2 Name of material(hot-wrought carbon steel bars),3.1.3 Dimensions,3.1.4 ASTM specification number and date of issue,3.1.5 Deoxidation practice(se
9、e 4.2.1),3.1.6 Grade designation or chemical composition limits(see5.1 and Table 1),3.1.7 Coarse or fine grain steel(4.2.2),3.1.8 Test reports,if required(Section 7),3.1.9 Additions to the specification and SupplementaryRequirements,if required,and3.1.10 End use.NOTE1Atypical ordering description is
10、 as follows:10 000 lb,carbonsteel bars,hot rolled 1 000 in.diameter by 10 ft,ASTM A576 dated _,killed steel,Grade 1018,test reports required,coarse grain SupplementaryRequirement S10,welded industrial fan hubs and shafts.4.Materials and Manufacture4.1 Melting PracticeThe steel shall be made by one o
11、rmore of the following primary processes:open-hearth,basic-oxygen,or electric-furnace.The primary melting may incor-porate separate degassing or refining and may be followed bysecondary melting using electroslag remelting or vacuum arcremelting.Where secondary melting is employed,the heatshall be de
12、fined as all of the ingots remelted from a singleprimary heat.4.2 Deoxidation:4.2.1 Unless otherwise specified,the steel shall be rimmed,capped,semi-killed,or killed at the manufacturers option.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related A
13、lloys and is the direct responsibility of SubcommitteeA01.15 on Bars.Current edition approved March 1,2012.Published April 2012.Originallyapproved in 1967.Last previous edition approved in 2006 as A576 90b(2006).DOI:10.1520/A0576-90BR12.2For referenced ASTM standards,visit the ASTM website,www.astm.
14、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 Society of Automotive Engineers,400 Commonwealth Drive,Warrendale,PA 15096.Copyright ASTM International,100 Barr
15、Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 TABLE 1 Grade Designations and Chemical Requirements of Hot-Wrought Carbon Steel BarsNOTE1Grade designations and compositions correspond to the respective AISI designations and compositions.UNS DesignationAGradeHeat Chemical Ran
16、ges and Limits,%CarbonManganesePhosphorus,maxSulfur,maxBNonresulfurized Carbon SteelsC,D,E,F,GLow Manganese 1.00%max or lessG1008010080.10 max0.300.500.0400.050G1010010100.080.130.300.600.0400.050G1012010120.100.150.300.600.0400.050G1015010150.130.180.300.600.0400.050G1016010160.130.180.600.900.0400.050G1017010170.150.200.300.600.0400.050G1018010180.150.200.600.900.0400.050G1019010190.150.200.701.000.0400.050G1020010200.180.230.300.600.0400.050G1021010210.180.230.600.900.0400.050G1022010220.180.