1、Designation:A758/A758M14Standard Specification forWrought-Carbon Steel Butt-Welding Piping Fittings withImproved Notch Toughness1This standard is issued under the fixed designation A758/A758M;the number immediately following the designation indicates the yearof original adoption or,in the case of re
2、vision,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 specification covers wrought-carbon steel butt-welding seamless or welded fittings specially proc
3、essed toensure better notch toughness than that to be expected infittings manufactured to the requirements of SpecificationA234/A234M.1.1.1 Included are elbows,caps,tees,reducers,and othertype fittings covered by ASME B16.9.1.1.2 Heat treatment is required for all fittings.1.1.3 Fittings with mandat
4、ory radiographic examination ofwelds are included.1.1.4 Supplementary requirements are provided for usewhen additional testing or examination is desired.1.1.5 Cast fittings,and fittings formed from all weld metal,are not included.1.2 Several type of fittings are provided,as follows:TypeHeat Treatmen
5、tRequiredWeld SeamFinish(5.3.2)RadiographyRequired?30normalizeUW-35no31normalizeUW-35yes32normalizeUW-35 and ground flushyes40normalize and temperUW-35no41normalize and temperUW-35yes42normalize and temperUW-35 and ground flushyes50quench and temperUW-35no51quench and temperUW-35yes52quench and temp
6、erUW-35 and ground flushyes1.3 It shall be the responsibility of the purchaser to deter-mine whether material meeting the requirements of this speci-fication is satisfactory for the service application.1.4 This specification is expressed in both inch-pound unitsand SI units.However,unless the order
7、specifies the applicable“M”specification designation(SI units),the material shall befurnished to inch-pound units.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 ma
8、y 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 In addition to those reference documents listed inSpecification A960/A960M,the following list of stan
9、dardsapply to this specification:2.2 ASTM Standards:2A234/A234M Specification for Piping Fittings of WroughtCarbon Steel and Alloy Steel for Moderate and HighTemperature ServiceA275/A275M Practice for Magnetic Particle Examination ofSteel ForgingsA960/A960M Specification for Common Requirements forW
10、rought Steel Piping FittingsE165 Practice for Liquid Penetrant Examination for GeneralIndustryE709 Guide for Magnetic Particle Testing2.3 ASME Boiler and Pressure Vessel Code(ASME Code):3Section VIII,Division 1Section IX2.4 ASME Standard:B16.9 Standards for Steel Butt-Welding Fittings32.5 ASNT Stand
11、ard:SNT-TC-1A Practice for Nondestructive Examination Per-sonnel Qualification and Certification43.Ordering Information3.1 See Specification A960/A960M.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of
12、SubcommitteeA01.22 on Steel Forgings and Wrought Fittings for Piping Applications and BoltingMaterials for Piping and Special Purpose Applications.Current edition approved Oct.1,2014.Published October 2014.Originallyapproved in 1978.Last previous edition approved in 2013 as A758/A758M13.DOI:10.1520/
13、A0758_A0758M-14.2For 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 American Society of Mechanical Eng
14、ineers(ASME),ASMEInternational Headquarters,Two Park Ave.,New York,NY 10016-5990,http:/www.asme.org.4Available fromAmerican Society for Nondestructive Testing(ASNT),P.O.Box28518,1711 Arlingate Ln.,Columbus,OH 43228-0518,http:/www.asnt.org.*A Summary of Changes section appears at the end of this stan
15、dardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1Copyright by ASTM Intl(all rights reserved);4.General Requirements4.1 Product furnished to this specification shall conform tothe requirements of Specification A960/A960M,including anysup
16、plementary requirements that are indicated in the purchaseorder.Failure to comply with the requirements of SpecificationA960/A960M constitutes non-conformance with this specifi-cation.In case of a conflict between the requirements of thisspecification and Specification A960/A960M,this specificationshall prevail.5.Materials and Manufacture5.1 The steel shall be killed and shall be melted to a fineaustenitic grain size practice.5.2 The starting material shall be wrought and in the form ofblooms,bi
