ASTM_A_322_-_13.pdf

Designation:A32213Standard Specification forSteel Bars,Alloy,Standard Grades1This standard is issued under the fixed designation A322;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.Scope1.1 This specification covers hot-wrought alloy steel bars.Bar applications include forging,heat treating,cold drawing,machining and many structural components(Note 1).NOTE1A guide for the selection of steel bars is contained in PracticeA400.1.2 The bars shall be furnished in the grades specified inTable 1.Sections and sizes of bar steel available are covered inSpecification A29/A29M.Hot-wrought alloy steel bars areproduced in cut lengths and coils;the manufacturer should beconsulted regarding sections and sizes available in coils,produced to a chemical composition.1.3 Some applications may require superior surface quality,or special chemical restrictions,metallurgical characteristics,heat treatment,or surface finishes which the purchaser mayobtain by designating one or more of the available Supplemen-tary Requirements.2.Referenced Documents2.1 ASTM Standards:2A29/A29M Specification for Steel Bars,Carbon and Alloy,Hot-Wrought,General Requirements forA304 Specification for Carbon and Alloy Steel Bars Subjectto End-Quench Hardenability RequirementsA400 Practice for Steel Bars,Selection Guide,Composition,and Mechanical PropertiesE112 Test Methods for Determining Average Grain SizeE381 Method of Macroetch Testing Steel Bars,Billets,Blooms,and ForgingsE527 Practice for Numbering Metals and Alloys in theUnified Numbering System(UNS)3.Ordering Information3.1 Orders under this specification should include the fol-lowing as required to describe adequately the desired material:3.1.1 Quantity(weight or number of bars),3.1.2 Name of material(hot-wrought alloy steel bars),3.1.3 Dimensions,3.1.4 ASTM designation,3.1.5 Deoxidation practice(see 5.3),3.1.6 Grade designation or chemical composition limits(see6.1 and Table 1),3.1.7 Grain size if required,3.1.8 Test reports,if required(Section 8),3.1.9 Additions to the specification and SupplementaryRequirements,if required,and3.1.10 Application.4.General Requirements4.1 Material furnished under this specification shall con-form to the applicable requirements of the current edition ofSpecification A29/A29M,unless otherwise provided herein.5.Materials and Manufacture5.1 The steel shall be made by one or more of the followingprimary processes:basic-oxygen or electric-furnace.The pri-mary melting may incorporate separate degassing or refiningand may be followed by secondary melting using electro-slagremelting or vacuum arc remelting.Where secondary meltingis employed,the heat shall be defined as all of the cast productremelted from a single primary heat.5.2 The steel shall be furnished as strand cast or ingot cast,unless otherwise specified.5.2.1 DiscardA sufficient discard shall be made to securefreedom from injurious piping and undue segregation.5.3 DeoxidationKilled steel is required.5.3.1 The purchaser may designate that the steel be made tocoarse or fine austenitic grain size.(See Supplementary Re-quirement S9 or S10.)5.4 Slow CoolingImmediately after hot forming,the barsshall be allowed to cool to a temperature below the criticalrange under suitable conditions to prevent imperfectionscaused by too rapid cooling.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.15 on Bars.Current edition approved May 1,2013.Published June 2013.Originallyapproved in 1947.Last previous edition approved in 2007 as A322 07.DOI:10.1520/A0322-13.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 TABLE 1 Grade Designations and Chemical Compositions of Hot-Wrought Alloy Steel BarsA,BUNSDesignationCGradeDDesignationsChemical Composition,Ranges and Limits,%CarbonManganesePhosphorus,maxSulfur,EmaxSiliconFNickelChromiumMolybdenumG1330013300.280.331.601.900.0350.0400.150.35.G1335013350.330.381.601.900.0350.0400.150.35.G1340013400.380.431.601.900.0350.0400.150.35.G1345013450.430.481.601.900.0350.0400.150.35.G4012040120.090.140.751.000.0350.0400.150.35.0.150.25G4023040230.200.250.700.900.0350.0400.150.35.0.200.30G4024040240.200.250.700.900.0350.0350.0500.150.35.0.200.30G4027040270.250.300.700.900.0350.0400.150.35.0.200.30G4028040280.250.300.700.900.0350.0350.0500.150.35.0.200.30G4032040320.300.350.700.