ASTM B655/B655M-10(2018)
(Specification)Standard Specification for Niobium-Hafnium Alloy Bar and Wire
Standard Specification for Niobium-Hafnium Alloy Bar and Wire
ABSTRACT
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.
SIGNIFICANCE AND USE
12.1 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.
SCOPE
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:B655/B655M −10 (Reapproved 2018)
Standard Specification for
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Niobium-Hafnium Alloy Bar and Wire
This standard is issued under the fixed designation B655/B655M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope E29 Practice for Using Significant Digits in Test Data to
Determine Conformance with Specifications
1.1 This specification covers hafnium alloyed niobium bar
E2626 Guide for Spectrometric Analysis of Reactive and
and wire.
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Refractory Metals (Withdrawn 2017)
1.2 The material covered by this specification is R04295,
niobium-base alloy containing approximately 10 % hafnium
3. Terminology
and 1 % titanium.
3.1 Definitions:
1.3 The values stated in either SI units or inch-pound units
3.1.1 lot, n—a lot is defined as that material produced from
are to be regarded separately as standard. The values stated in
one ingot and heat treated at the same conditions. Unless
each system may not be exact equivalents; therefore, each
otherwise agreed between manufacturer and purchaser, a lot
system shall be used independently of the other. Combining
shall be limited to the product of an 8 h period for final
values from the two systems may result in non-conformance
continuous anneal or to a single furnace load for a final batch
with the standard.
anneal.
1.4 The following safety hazards caveat pertains only to the
3.1.2 bar, n—a hot rolled, forged, or cold worked semifin-
test methods portion, Section 14, of this specification: This
ished solid section product whose cross sectional area is equal
standard does not purport to address all of the safety concerns,
to or less than 16 sq in. [10.323 sq mm]; rectangular bar must
if any, associated with its use. It is the responsibility of the user
be less than or equal to 10 in. [254 mm] in width and greater
of this standard to establish appropriate safety, health, and
than 0.187 in. [4.8 mm] in thickness.
environmental practices and determine the applicability of
3.1.3 wire, n—material 0.020 to 0.1875 in. [0.50 to 4.8 mm]
regulatory limitations prior to use.
in diameter furnished in coils, spools, or on reels. Material less
1.5 This international standard was developed in accor-
than 0.020 in. [0.50 mm] in diameter is not covered in this
dance with internationally recognized principles on standard-
specification.
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom-
4. Ordering Information
mendations issued by the World Trade Organization Technical
4.1 Orders for material under this specification should
Barriers to Trade (TBT) Committee.
include the following information as applicable:
2. Referenced Documents 4.1.1 General alloy description (see 1.2) and ASTM desig-
nation and year of issue,
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2.1 ASTM Standards:
4.1.2 Quantity in weight or pieces,
B652/B652M Specification for Niobium-Hafnium Alloy In-
4.1.3 Size, diameter, and length,
gots
4.1.4 Chemical Composition (Section 6),
E8/E8M Test Methods for Tension Testing of Metallic Ma-
4.1.5 Temper (Section 7),
terials
4.1.6 Mechanical test temperature and limits (Sections 8
E21 TestMethodsforElevatedTemperatureTensionTestsof
and 14),
Metallic Materials
4.1.7 Permissible dimensional tolerances and weight or
quantity variations (see 9.2 and 9.4),
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This specification is under the jurisdiction of ASTM Committee B10 on
4.1.8 Quality and finish (see 10.2),
Reactive and Refractory Metals and Alloys and is the direct responsibility of
Subcommittee B10.03 on Niobium and Tantalum. 4.1.9 Sampling (see 13.2),
Current edition approved Oct. 1, 2018. Published October 2018. Originally
4.1.10 Inspection witnessing (see 15.2),
approved in 1979. Last previous edition approved in 2010 as B655/B655M – 10.
4.1.11 Certification requirements (Section 18), and
DOI: 10.1520/B0655_B0655M-10R18.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
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Standards volume information, refer to the standard’s Document Summary page on The last approved version of this historical standard is referenced on
the ASTM website. www.astm.org.
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B655/B655M−10 (2018)
TABLE 2 Additional Chemical Requirements for Finished
4.1.12 Packaging (Section 20),
Product (When Specified by
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