1、Designation: B674 05 (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 o
2、f last revision. 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
3、This specification covers outside diameter and nominalwall tube.1.2.1 The tube sizes covered by this specification are18 to 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
4、 such as UNS N08904, 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 specifica
5、tion are now covered by 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 t
6、o address all of thesafety 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 ap
7、propriate safety and healthpractices, 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 Requireme
8、nts for Nickel andNickel Alloy Welded 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 S
9、ize (outsize diameter, minimum or average 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
10、inspec-tions are to be witnessed, if any (see 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 t
11、he weld metal only or both weld andbase metal.NOTE 1The 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 B0
12、2 onNonferrous Metals and Alloys and is the direct responsibility 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/B0674-05
13、R16.2New designation established in accordance with Practice 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
14、 refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1followed by quenching in water or rapid cooling by other means.4.2 Tube shall be furnished with oxide removed. Whenbrigh
15、t annealing is used, descaling is not necessary.5. Chemical Composition5.1 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
16、in Table 1, subject to the analysistolerances of Specification B751.6. Mechanical 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 Test
17、A 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 1Each piece in each lot
18、 shall be subject to oneof the following four tests: hydrostatic, pneumatic (airunderwater), eddy current, or ultrasonic.6.4.2 Class 2Each piece in each lot shall be subjected toa leak test and an electric test as follows:6.4.2.1 Leak TestHydrostatic or pneumatic (air underwa-ter).6.4.2.2 Electric T
19、estEddy current or ultrasonic.6.5 The manufacturer shall have the option to test to Class1 or 2 and select the nondestructive test methods, if notspecified by the purchaser.7. General Requirements7.1 Material furnished under this specification shall con-form to the applicable requirements of the cur
20、rent edition ofSpecification B751 unless otherwise provided herein.8. Keywords8.1 UNS N08925; UNS N08354; UNS N08926; weldedtubeASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are
21、 expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not r
22、evised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you
23、 may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United
24、States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also
25、 be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 1 Chemical RequirementsElementUNS N08925 UNS N08354 UNS N08926Carbon, max 0.020 0.030 0.020Manganese, max 1.00 1.00 2.00Phosphorus, max 0.045 0.030 0.03Sulfur, max 0.030 0.010 0.01Silic
26、on, max 0.50 1.00 0.5Nickel 24.0 to 26.0 34.0 to 36.0 24.00 to 26.00Chromium 19.0 to 21.0 22.0 to 24.0 19.00 to 21.00Molybdenum 6.0 to 7.0 7.0 to 8.0 6.0 to 7.0Copper 0.8 to 1.5 . 0.5 to 1.5Nitrogen 0.1 to 0.2 0.17 to 0.24 0.15 to 0.25Iron balance balance balanceTABLE 2 Mechanical PropertiesAlloy TemperTensile Strength, min,psi (MPa)Yield Strength, 0.2 %offset, min, psi (MPa)Elongation in 2 in. or50 mm (or 4D), min, %UNS N08925 solution annealed 87 (600) 43 (295) 40UNS N08354 solution annealed 93 (640) 43 (295) 40UNS N08926 solution annealed 94 (650) 43 (295) 35B674 05 (2016)2
