ASTM B391-03
Historical Standard: ASTM B391-03 Standard Specification for Niobium and Niobium Alloy Ingots
SUPERSEDED (see Active link, below)
ASTM B391
1. Scope
1.1 This specification covers unalloyed and alloyed niobium ingots prepared by vacuum- or plasma-arc melting or electron-beam melting to produce consolidated metal for processing to various mill shapes.
Note 1Committee B10 has adopted 'niobium' as the designation for Element No. 41, formerly named 'columbium.'
1.2 The materials covered by this specification are:
1.2.1 R04200-Type 1 Reactor grade unalloyed niobium,
1.2.2 R04210-Type 2 Commercial grade unalloyed niobium,
1.2.3 R04251-Type 3 Reactor grade niobium alloy containing 1 % zirconium, and
1.2.4 R04261-Type 4 Commercial grade niobium alloy containing 1 % zirconium.
1.3 Unless a single unit is used, for example force for hardness testing in kN, the values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 The following precautionary caveat pertains only to the test method portions of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
ASTM Standards
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E2626 Guide for Spectrometric Analysis of Reactive and Refractory Metals
Keywords
niobium; niobium alloy ingots; Ingots; Niobium and niobium alloys--specifications; UNS R04200 (Nb (Cb), unalloyed, reactor grade); UNS R04210 (Nb (Cb), unalloyed, commercial grade); UNS R04251 (Nb (Cb)-Zr, reactor grade); UNS R04261 (Nb (Cb)-Zr, commercial grade) ;
ICS Code
ICS Number Code 77.150.99 (Other products of non-ferrous metals)
DOI: 10.1520/B0391-03
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