1、Designation:B67405(Reapproved 2016)Standard Specification forUNS N08925,UNS N08354,and UNS N08926 Welded Tube1This standard is issued under the fixed designation B674;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last r
2、evision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This specification covers UNS N08925,2UNS N08354,and UNS N08926 welded tube for general corrosion applica-tions.1.2 This specific
3、ation covers outside diameter and nominalwall tube.1.2.1 The tube sizes covered by this specification are18to 5in.(3.2 to 127 mm)in outside diameter and 0.015 to 0.320 in.(0.38 to 8.13 mm),inclusive,in wall thickness.1.3 ASTM International has adopted definitions wherebysome grades,such as UNS N0890
4、4,previously in this speci-fication were recognized as stainless steels,because thosegrades have iron as the largest element by mass percent.Suchgrades are under the oversight of ASTM Committee A01 andits subcommittees.The products of N08904 previously coveredin this specification are now covered by
5、 Specification A249/A249M.1.4 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.5 This standard does not purport to address all of thesafe
6、ty concerns,if any,associated with its use.It is theresponsibility of the user of this standard to become familiarwith all hazards including those identified in the appropriateSafety Data Sheet(SDS)for this product/material as providedby the manufacturer,to establish appropriate safety and healthpra
7、ctices,and determine the applicability of regulatory limi-tations prior to use.2.Referenced Documents2.1 ASTM Standards:3A249/A249M Specification for Welded Austenitic SteelBoiler,Superheater,Heat-Exchanger,and CondenserTubesB751 Specification for General Requirements for Nickel andNickel Alloy Weld
8、ed TubeE527 Practice for Numbering Metals and Alloys in theUnified Numbering System(UNS)3.Ordering Information3.1 Orders for material to this specification should includethe following information:3.1.1 Quantity(feet or number of lengths),3.1.2 UNS number,3.1.3 Size(outsize diameter,minimum or averag
9、e wallthickness),3.1.4 Length(random or specific),3.1.5 Class,and3.1.6 ASTM designation.3.1.7 Product AnalysisState if required.3.1.8 CertificationState if a certification or a report of testresults is required.3.1.9 Purchaser InspectionState which tests or inspec-tions are to be witnessed,if any(se
10、e Tables 1 and 2).4.Materials and Manufacture4.1 Tube shall be made from flat-rolled alloy by an auto-matic welding process with no addition or filler metal.Subse-quent to welding and prior to final annealing,the material shallbe cold-worked in either the weld metal only or both weld andbase metal.N
11、OTE1The recommended heat treatment shall consist of heating to atemperature of 1975 to 2150F(1080 to 1180C)for UNS N08354 or2010 to 2100F(1100 to 1150C)for UNS N08925 and UNS N08926,1This specification is under the jurisdiction of ASTM Committee B02 onNonferrous Metals and Alloys and is the direct r
12、esponsibility of SubcommitteeB02.07 on Refined Nickel and Cobalt and Their Alloys.Current edition approved June 1,2016.Published June 2016.Originallyapproved in 1980.Last previous edition approved in 2011 as B674 05(2011).DOI:10.1520/B0674-05R16.2New designation established in accordance with Practi
13、ce E527 and SAE J1086,Practice for Numbering Metals and Alloys(UNS).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 websit
14、e.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 followed by quenching in water or rapid cooling by other means.4.2 Tube shall be furnished with oxide removed.Whenbright annealing is used,descaling is not necessary.5.Chemical Composition
15、5.1 The material shall conform to the composition limitsspecified in Table 1.One test is required for each lot as definedin Specification B751.5.2 If a product analysis is performed,it shall meet thechemistry limits prescribed in Table 1,subject to the analysistolerances of Specification B751.6.Mech
16、anical and Other Properties6.1 Mechanical PropertiesThe material shall conform tothe mechanical property requirements specified in Table 2.Onetest is required for each lot as defined in Specification B751.6.2 Flattening TestA flattening test shall be made on eachend of one tube per lot.Superficial ruptures resulting fromsurface imperfections shall not be cause for rejection.6.3 Flange TestA flange test shall be made on each end ofone tube per lot.6.4 Nondestructive Test Requirements:6.4.1 Class
