1、Designation:A778/A778M16Standard Specification forWelded,Unannealed Austenitic Stainless Steel TubularProducts1This standard is issued under the fixed designation A778/A778M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of
2、 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 straight seam and spiral buttseam welded unannealed austenitic stainless steel tubularproducts
3、 intended for low and moderate temperatures andcorrosive service where heat treatment is not necessary forcorrosion resistance.Table 1 lists the five grades covered bythis specification.The user of this specification should beaware that a minimum amount of testing and examination isrequired of the b
4、asic product.The user requiring additionaltesting or examination is referred to the supplemental require-ments or Ordering Information,or both.Users requiring atubular product with post-weld heat treatment or with radio-graphic examination are referred to Specification A312/A312M,A358/A358M,or A409/
5、A409M,as applicable.1.2 This specification covers welded unannealed tubularproducts 3 in.75 mm through 48 in.1200 mm in outsidediameter and in nominal wall thicknesses of 0.062 in.1.57mm through 0.500 in.12.70 mm produced to this specifica-tion.Tubular products having other diameters or wallthicknes
6、s,or both,may be furnished provided it complies withall other requirements of this specification.1.3 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard.Within the text,SIunits are shown in brackets.The values stated in each systemmay not be exact equiva
7、lents;therefore,each system shall beused independently of the other.Combining the values fromthe two systems may result in non-conformance with thestandard.The inch-pound units shall apply unless the“M”designation of this specification is specified in the order.2.Referenced Documents2.1 ASTM Standar
8、ds:2A240/A240M Specification for Chromium and Chromium-Nickel Stainless Steel Plate,Sheet,and Strip for PressureVessels and for General ApplicationsA262 Practices for Detecting Susceptibility to IntergranularAttack in Austenitic Stainless SteelsA312/A312M Specification for Seamless,Welded,andHeavily
9、 Cold Worked Austenitic Stainless Steel PipesA358/A358M Specification for Electric-Fusion-WeldedAustenitic Chromium-Nickel Stainless Steel Pipe forHigh-Temperature Service and General ApplicationsA370 Test Methods and Definitions for Mechanical Testingof Steel ProductsA409/A409M Specification for We
10、lded Large DiameterAustenitic Steel Pipe for Corrosive or High-TemperatureServiceA700 Guide for Packaging,Marking,and Loading Methodsfor Steel Products for ShipmentA941 Terminology Relating to Steel,Stainless Steel,RelatedAlloys,and FerroalloysA999/A999M Specification for General Requirements forAll
11、oy and Stainless Steel PipeE340 Practice for Macroetching Metals and AlloysE527 Practice for Numbering Metals and Alloys in theUnified Numbering System(UNS)2.2 AWS Standards:A5.4 CorrosionResisting Chromium and Chromium-Nickel Steel Covered Welding Electrodes3A5.9 CorrosionResisting Chromium and Chr
12、omium-NickelSteel Welding Rods and Bare Electrodes32.3 SAE Standard:SAE J1086 Practice for Numbering Metals and Alloys(UNS)43.Terminology3.1 Definitions:3.2 The definitions in Specification A999/A999M and Ter-minology A941 are applicable to this specification.1This specification is under the jurisdi
13、ction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.10 on Stainless and Alloy Steel Tubular Products.Current edition approved May 1,2016.Published May 2016.Originallyapproved in 1980.Last previous edition approved in 2015 as A77
14、8 15.DOI:10.1520/A0778_A0778M-16.2For 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 Welding
15、Society(AWS),550 NW LeJeune Rd.,Miami,FL 33126,http:/www.aws.org.4Available from Society of Automotive Engineers(SAE),400 CommonwealthDr.,Warrendale,PA 15096-0001,http:/www.sae.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO
16、Box C700,West Conshohocken,PA 19428-2959.United States1 4.Ordering Information4.1 Orders for material to this specification should includethe following:4.1.1 Quantity(feet,metres,or number of pieces),4.1.2 Name of material(welded unannealed austenitic stain-less steel tubular products),4.1.3 Straight seam or spiral butt seam,4.1.4 Grade(see Table 1),4.1.5 Size(outside diameter and specified wall thickness)(see 10.3 and 10.4),4.1.6 Length(mill standard lengths,or specify cut lengths)(see 10.1),4.
