ASTM B655/B655M-04

    Standard Specification for Niobium-Hafnium Alloy Bar, Rod, and Wire


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    1. Scope

    1.1 This specification covers hafnium alloyed niobium bar, rod, and wire.

    1.2 The material covered by this specification is R04295, niobium-base alloy containing approximately 10 % hafnium and 1 % titanium.

    1.3 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.

    1.4 The following safety hazards caveat pertains only to the test methods portion, Section 14, 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

    B652/B652M Specification for Niobium-Hafnium Alloy Ingots

    E8 Test Methods for Tension Testing of Metallic Materials

    E21 Test Methods for Elevated Temperature Tension Tests of Metallic Materials

    E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

    E2626 Guide for Spectrometric Analysis of Reactive and Refractory Metals


    ICS Code

    ICS Number Code 77.150.99 (Other products of non-ferrous metals)

    UNSPSC Code

    UNSPSC Code 30266000(Precious metal and specialty metal bars)


    Referencing This Standard

    DOI: 10.1520/B0655_B0655M-04

    ASTM International is a member of CrossRef.


    Citation Format

    ASTM B655 / B655M-04, Standard Specification for Niobium-Hafnium Alloy Bar, Rod, and Wire, ASTM International, West Conshohocken, PA, 2004, www.astm.org

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