1、Designation:A522/A522M14Standard Specification forForged or Rolled 8 and 9%Nickel Alloy Steel Flanges,Fittings,Valves,and Parts for Low-Temperature Service1This standard is issued under the fixed designation A522/A522M;the number immediately following the designation indicates the yearof original ad
2、option 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 8 and 9%nickel-alloy steelforged or rolled flange
3、s,fittings,valves,and parts intended foruse in welded pressure vessels for low-temperature service.The specification is applicable to forgings with maximumsection thickness of 3 in.75 mm in the double normalizedand tempered condition and 5 in.125 mm in the quenchedand tempered condition.Forgings und
4、er this specification areintended for service at operating temperatures not lower than320 F 196 C for Type I or 275 F 170 C for TypeII or higher than 250 F 121 C.1.2 Material under this specification is available in twotypes having different chemical compositions as follows:TypeNominal Nickel Conten
5、t,%III981.3 This specification is expressed in both inch-pound unitsand SI units.However,unless the order specifies the applicable“M”specification designation(SI units),the material shall befurnished to inch-pound units.1.4 The values stated in either inch-pound units or SI unitsare to be regarded s
6、eparately 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 Document
7、s2.1 ASTM Standards:3A788/A788M Specification for Steel Forgings,General Re-quirementsA961/A961M Specification for Common Requirements forSteel Flanges,Forged Fittings,Valves,and Parts forPiping Applications3.General Requirements and Ordering Information3.1 Product furnished to this specification sh
8、all conform tothe requirements of Specification A961/A961M,including anysupplementary requirements that are indicated in the purchaseorder.Failure to comply with the requirements of SpecificationA961/A961M constitutes nonconformance with this specifica-tion.3.2 It is the purchasers responsibility to
9、 specify in thepurchase order all ordering information necessary to furnishthe needed material.Examples of such information include butare not limited to the ordering information in SpecificationA961/A961M and following:3.2.1 Any supplementary requirements,and3.2.2 Additional requirements,(See 4.5,5
10、.2,6.1,7.2,and10.3).4.Materials and Manufacture4.1 The steel shall be produced in accordance with themelting process section of Specification A788/A788M.4.2 Material for forgings shall consist of ingots,or eitherforged or rolled blooms,billets,or bars.4.3 The finished product shall be a forging as d
11、efined in theTerminology Section of Specification A788/A788M.4.4 Except for flanges of all types,hollow cylindricallyshaped parts may be made from hot-rolled or forged bar,provided that the axial length of the part is approximatelyparallel to the metal flow lines of the stock.Except for all typesof
12、flanges,elbows,return bends,tees,and header tees,otherparts up to and including NPS 4 may be machined fromhot-rolled or forged bar.4.5 When specified in the order,the manufacturer shallsubmit for purchasers approval a sketch showing the shape ofthe rough forging before machining.1This specification
13、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
14、Oct.1,2014.Published October 2014.Originallyapproved in 1964.Last previous edition approved in 2013 s A522/A522M13.DOI:10.1520/A0522_A0522M-14.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation SA-522 in Section II of that Code.3For referenced ASTM standards,visit the
15、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 Harb
16、or Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1Copyright by ASTM Intl(all rights reserved);5.Chemical Composition5.1 The steel shall conform to the requirements of Table 1.5.2 If required by the purchaser,product analysis may beperformed in accordance with the requirements of A961/A961M.6.Heat Treatment6.1 The forgings shall be heat treated by the manufacturerby either of the following methods as mutually agreed uponbetween the purchaser and the manufacturer.6.1.1 Quenched an
