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ASTM B655/B655M-10

Current Revision

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

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1.1 This specification covers hafnium alloyed niobium bar 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 SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

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.

This specification covers hafnium alloyed niobium bar, rod, and wire. The material covered by this specification is R04295, a niobium-base alloy containing hafnium and titanium. The alloy shall conform to the required chemical composition for carbon, oxygen, nitrogen, hydrogen, hafnium, titanium, zirconium, tungsten, tantalum, and niobium. Materials in the annealed condition supplied under this specification shall conform to the required mechanical properties such as tensile strength, yield strength, and elongation. The alloy shall undergo the following test methods: room temperature tension test; elevated temperature tension test; and chemical test.


The following applies to all specified limits in this standard for purposes of determining conformance with this specification. The observed value or a calculated value shall be rounded off to the nearest unit in the last right-hand digit used in expressing the specification limit, in accordance with the rounding-off method of Practice E29.

SDO ASTM: ASTM International
Document Number B655
Publication Date May 1, 2010
Language en - English
Page Count 4
Revision Level 10
Supercedes
Committee B10.03
Publish Date Document Id Type View
May 1, 2010 B0655_B0655M-10 Revision
May 1, 2004 B0655_B0655M-04 Revision
Oct. 1, 2018 B0655_B0655M-10R18 Reaffirmation
May 10, 1999 B0655_B0655M-96R99 Reaffirmation