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Designation: B392 − 09 ´1Standard Specif i cation forNiobium and Niobium Alloy Bar, Rod, and Wire 1This standard is issued under the f i xed designation B392; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of 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 NOTE—Editorial corrections were made throughout in January 2010.1. Scope1.1 This specif i cation covers four grades of wrought nio-bium and niobium alloy bar, rod, and wire as follows:1.1.1 R04200-Type 1—Reactor grade unalloyed niobium,1.1.2 R04210-Type 2—Commercial grade unalloyedniobium,1.1.3 R04251-Type 3—Reactor grade niobium alloy contain-ing 1 % zirconium, and1.1.4 R04261-Type 4—Commercial grade niobium alloycontaining 1 % zirconium.1.2 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.1.3 The following precautionary caveat pertains only to thetest methods portion of this specif i cation. This standard doesnot purport to address all of the safety concerns, if any,associated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations priorto use.2. Referenced Documents2.1 ASTM Standards: 2B391 Specif i cation for Niobium and Niobium Alloy IngotsE8 Test Methods for Tension Testing of Metallic MaterialsE29 Practice for Using Signif i cant Digits in Test Data toDetermine Conformance with Specif i cationsE2626 Guide for Spectrometric Analysis of Reactive andRefractory Metals3. Terminology3.1 Def i nitions of Terms Specif i c to This Standard:3.1.1 lot, n—a 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.3.1.2 bar, n—material less than 6 in. (152.4 mm) in widthand 0.187 in. (4.75 mm) or greater in thickness, with arectangular cross section, supplied in straight lengths.3.1.3 rod, n—material 0.125 to 2.50 in. (3.18 to 63.50 mm)in diameter, in round, hexagonal, or octagonal cross sectionsupplied in straight lengths.3.1.4 wire, n—material 0.020 to 0.124 in. (0.51 to 3.15 mm)in diameter, furnished in coils or on spools or reels. Materialless than 0.020 in. (0.51 mm) in diameter is not covered by thisspecif i cation.4. Ordering Information4.1 Orders for materials under this specif i cation 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 Method of manufacture (Section 5),4.1.4 Temper designation (Section 8),4.1.5 Quantity in weight, number of pieces, and dimensions,4.1.6 Chemistry (6.3),4.1.7 Mechanical properties (Section 7),4.1.8 Condition (8.2),4.1.9 Permissible Variations (9.2),4.1.10 Permissible overshipments (9.4),4.1.11 Quality and f i nish (Section 10),4.1.12 Sampling (Section 11),4.1.13 Inspection (Section 15),4.1.14 Required reports (Section 17), and4.1.15 Additions to the specif i cation and supplementaryrequirements, as required.5. Materials and Manufacture5.1 Material covered by this specif i cation shall be madefrom ingots that conform to Specif i cation B391 and that are1 This specif i cation is under the jurisdiction of ASTM Committee B10 onReactive and Refractory Metals and Alloys and is the direct responsibility ofSubcommittee B10.03 on Niobium and Tantalum.Current edition approved Oct. 1, 2009. Published December 2009. Originallyapproved in 1989. Last previous edition approved in 2003 as B392 - 03. DOI:10.1520/B0392-09E01.2 For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at service@astm.org. For Annual Book of ASTMStandards volume information, refer to the standard’s Document Summary page onthe ASTM website.Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1