ASTM_A_540_-_A_540M_-_15.pdf

Designation:A540/A540M15Standard Specification forAlloy-Steel Bolting for Special Applications1This standard is issued under the fixed designation A540/A540M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification2covers regular and special-qualityalloy steel bolting materials and bolting components that maybe used for nuclear and other special applications.See Speci-fication A962/A962M for the definition of bolting.1.2 The following referenced common requirements areindispensable for application of this specification:SpecificationA962/A962M.1.3 Supplementary requirements of an optional nature areprovided for use at the option of the purchaser.These supple-mentary requirements only apply when specified individuallyby the purchaser in the purchase order or contract.1.4 This specification is expressed in both inch-pound unitsand in SI units;however,unless the purchase order or contractspecifies the applicable“M”specification designation(SIunits),inch-pound units shall apply.1.5 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.Within the text,theSI units are shown in brackets.The values stated in eachsystem may not be exact equivalents;therefore,each systemshall be used independently of the other.Combining valuesfrom the two systems may result in non-conformance with thestandard.2.Referenced Documents2.1 ASTM Standards:3A962/A962M Specification for Common Requirements forBolting Intended for Use at Any Temperature from Cryo-genic to the Creep RangeE45 Test Methods for Determining the Inclusion Content ofSteel3.Ordering Information3.1 The inquiry and orders for bolting material and boltingcomponents under this specification shall include thefollowing,as required,to describe the desired items ad-equately:3.1.1 Grade and Class3.1.2 Condition(Section 5),3.1.3 Heat treatment(Section 6),3.1.4 Supplementary Requirements(S1 to S9),3.1.5 Reports required(Section 16),3.1.6 End use,and3.1.7 Any special requirements.3.2 The purchaser is referred to the listed supplementaryrequirements.4.Common Requirements4.1 Bolting materials and bolting components supplied tothis specification shall conform to the requirements of Speci-fication A962/A962M.These requirements include testmethods,finish,thread dimensions,macro etch,marking,certification,optional supplementary requirements,and others.Failure to comply with the requirements of SpecificationA962/A962M constitutes nonconformance with this specifica-tion.In case of conflict between this specification and Speci-fication A962/A962M,this specification shall prevail.5.Manufacture5.1 Bolting material shall be supplied hot-rolled or hot-forged or cold-finished at the option of the producer.However,if desired by the purchaser,cold finishing may be specified.6.Heat Treatment6.1 Bolting material ordered in the annealed condition shallhave a structure suitable for machining.Such annealed materialis not intended to be used without subsequent quenching andtempering as specified in 6.2.6.2 Bolting material ordered in the liquid-quenched andtempered condition shall be uniformly reheated from a tem-perature below the cooling transformation range to the properaustenitizing temperature,quenched in a liquid medium undersubstantially uniform conditions,and then uniformly reheatedfor tempering.The minimum tempering temperature shall be850 F 455 C.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.22 on Steel Forgings and Wrought Fittings for Piping Applications and BoltingMaterials for Piping and Special Purpose Applications.Current edition approved Nov.1,2015.Published November 2015.Originallyapproved in 1965.Last previous edition approved in 2011 as A540/A540M11.DOI:10.1520/A0540_A0540M-15.2For ASME Boiler and Pressure Vessel Code Applications see related Specifi-cation SA-540 in Section II of that Code.3For 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.*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 6.3 Bolting material that has been straightened after quench-ing and tempering shall be stress relieved by reheating to atemperature not lower than 100 F 55 C under the temperingtemperature.7.Chemical Composition7.1 Steels used for bolting materials shall conform to thechemical requirements prescribed in Table 1.8.Tensile Requirements8.1 Bolting material furnished in the a