ASTM B394-2018 Standard Specification for Niobium and Niobium Alloy Seamless and Welded Tubes.pdf
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1、Designation: B394 18Standard Specification forNiobium and Niobium Alloy Seamless and Welded Tubes1This standard is issued under the fixed designation B394; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision.
2、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 wrought niobium and niobiumalloy seamless and welded tubes as follows:1.1.1 R04200-Type 1Reactor grade unal
3、loyed niobium,1.1.2 R04210-Type 2Commercial grade unalloyedniobium,1.1.3 R04251-Type 3Reactor grade niobium alloy contain-ing 1 % zirconium, and1.1.4 R04261-Type 4Commercial grade niobium alloycontaining 1 % zirconium.1.2 The values stated in inch-pound units are to be regardedas standard. The value
4、s given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 The following precautionary caveat pertains only to thetest methods portion of this specification. This standard doesnot purport to address all of the safety conce
5、rns, if any,associated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety, health, and environ-mental practices and determine the applicability of regulatorylimitations prior to use.1.4 This international standard was developed in accor-dance with inte
6、rnationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2B391
7、 Specification for Niobium and Niobium Alloy IngotsE8/E8M Test Methods for Tension Testing of Metallic Ma-terialsE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE2626 Guide for Spectrometric Analysis of Reactive andRefractory Metals (Withdrawn 2017)3
8、3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 lot, na lot shall consist of all material produced fromthe same ingot at one time, with the same cross section,processed with the same nominal metallurgical parameters andheat treated at the same conditions.4. Ordering Informatio
9、n4.1 Orders for materials under this specification shall in-clude the following information as applicable:4.1.1 Type and grade (Section 1),4.1.2 ASTM designation and year of issue,4.1.3 Welding (Section 5),4.1.4 Quantity in weight, number of pieces, and dimensions,4.1.5 Chemistry (6.3),4.1.6 Temper
10、designation (Section 8),4.1.7 Permissible variations in length and quantity or weight(9.2, 9.4, and Table 1B),4.1.8 Quality and finish (10.4),4.1.9 Sampling (11.2),4.1.10 Hydrostatic or pneumatic test (14.2),4.1.11 Inspection (Section 15),4.1.12 Required reports (Section 17), and4.1.13 Additions to
11、the specification and supplementaryrequirements, as required.5. Materials and Manufacture5.1 Material covered by this specification shall be madefrom ingots that conform to Specification B391 and that areproduced by vacuum or plasma arc melting, vacuum electron-beam melting, or a combination of thes
12、e three methods.5.2 Seamless tubes may be made by any seamless methodthat will yield a product meeting the requirements of thisspecification, such as, but not limited to, extrusion of billets1This specification is under the jurisdiction of ASTM Committee B10 onReactive and Refractory Metals and Allo
13、ys and is the direct responsibility ofSubcommittee B10.03 on Niobium and Tantalum.Current edition approved April 1, 2018. Published May 2018. Originallyapproved in 1989. Last previous edition approved in 2009 as B394 091which waswithdrawn January 2018 and reinstated in April 2018. DOI: 10.1520/B0394
14、-18.2For 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.3The last approved version of this historical standard is
15、 referenced onwww.astm.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles
16、for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1with subsequent cold working by drawing, swaging, orpilgering, with intermediate anneals, until the final dimensionsare reached.5.3 Welded tub
17、ing shall be made from flat-rolled productsby an automatic or semiautomatic welding process with noaddition of filler metal in the welding operation. Other methodsof welding, such as the addition of filler metal or hand welding,may be employed if approved by the purchaser and tested bymethods agreed
18、 upon between the manufacturer and thepurchaser. The manufacturer must use proper precautions toprevent contamination during welding.6. Chemical Requirements6.1 The niobium and niobium alloy ingots and billets forconversion to finished products covered by this specificationshall conform to the requi
19、rements for chemical composition asprescribed in Table 2.6.2 The manufacturers ingot analysis shall be consideredthe chemical analysis for products supplied under thisspecification, except for interstitials as specified in 6.3.Alternately, an analysis of a representative sample of in processor final
20、 product from the same ingot may be substituted.6.3 When requested by the purchaser at the time ofpurchase, the manufacturer shall furnish a report certifying thevalues of the interstitial elements (C, O, N, H) on end productas prescribed in Table 3 for each lot of material supplied. Endproduct inte
21、rstitial samples must be taken after all thermal andchemical processing.6.4 Guide E2626 is recommended as a guide, where appli-cable.7. Mechanical Requirements7.1 The annealed materials supplied under this specificationshall conform to the requirements for mechanical properties asspecified in Table
22、4.8. Temper Designations8.1 Unless otherwise stated, the materials supplied underthese specifications shall be in the fully annealed condition,that is, at least 90 % recrystallized.TABLE 1 Permissible Variations in Diameter and Wall ThicknessMeasured at any LocationANominal Outside Diameter,in. (mm)
23、BVariation inOutsideDiameter,Over andUnder, in.(mm)BVariation inInsideDiameter,Over andUnder, in.(mm)CVariation inWall Thickness,Over andUnder, %C,D0.187 to 0.625 (4.7 to 15.9), excl 0.004 (0.010) 0.004 (0.010) 100.625 to 1.000 (15.9 to 25.4), excl 0.005 (0.13) 0.005 (0.13) 101.000 to 2.000 (25.4 to
24、 50.8), excl 0.0075 (0.19) 0.0075 (0.19) 102.000 to 3.000 (50.8 to 76.2), excl 0.010 (0.25) 0.010 (0.25) 103.000 to 4.000 (76.2 to 101.6), excl 0.0125 (0.32) 0.0125 (0.32) 10AThese tolerances are applicable to only two dimensions, such as outsidediameter and wall, or inside diameter and wall, or out
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