ASTM B655/B655M-10
(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
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation:B655/B655M −10
Standard Specification for
1
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 3.1.1 lot, n—a lot is defined as that material produced from
one ingot and heat treated at the same conditions. Unless
1.1 This specification covers hafnium alloyed niobium bar
otherwise agreed between manufacturer and purchaser, a lot
and wire.
shall be limited to the product of an 8 h period for final
1.2 The material covered by this specification is R04295,
continuous anneal or to a single furnace load for a final batch
niobium-base alloy containing approximately 10 % hafnium
anneal.
and 1 % titanium.
3.1.2 bar, n—a hot rolled, forged, or cold worked semifin-
1.3 The values stated in either SI units or inch-pound units
ished solid section product whose cross sectional area is equal
are to be regarded separately as standard. The values stated in
to or less than 16 sq in. [10.323 sq mm]; rectangular bar must
each system may not be exact equivalents; therefore, each
be less than or equal to 10 in. [254 mm] in width and greater
system shall be used independently of the other. Combining
than 0.187 in. [4.8 mm] in thickness.
values from the two systems may result in non-conformance
3.1.3 wire, n—material 0.020 to 0.1875 in. [0.50 to 4.8 mm]
with the standard.
in diameter furnished in coils, spools, or on reels. Material less
1.4 The following safety hazards caveat pertains only to the
than 0.020 in. [0.50 mm] in diameter is not covered in this
test methods portion, Section 14, of this specification: This
specification.
standard does not purport to address all of the safety concerns,
if any, associated with its use. It is the responsibility of the user
4. Ordering Information
of this standard to establish appropriate safety and health
4.1 Orders for material under this specification should
practices and determine the applicability of regulatory limita-
include the following information as applicable:
tions prior to use.
4.1.1 General alloy description (see 1.2) and ASTM desig-
2. Referenced Documents
nation and year of issue,
2
4.1.2 Quantity in weight or pieces,
2.1 ASTM Standards:
4.1.3 Size, diameter, and length,
B652/B652M Specification for Niobium-Hafnium Alloy In-
4.1.4 Chemical Composition (Section 6),
gots
4.1.5 Temper (Section 7),
E8 Test Methods for Tension Testing of Metallic Materials
E21 TestMethodsforElevatedTemperatureTensionTestsof 4.1.6 Mechanical test temperature and limits (Sections 8
Metallic Materials and 14),
E29 Practice for Using Significant Digits in Test Data to
4.1.7 Permissible dimensional tolerances and weight or
Determine Conformance with Specifications quantity variations (see 9.2 and 9.4),
E2626 Guide for Spectrometric Analysis of Reactive and
4.1.8 Quality and finish (see 10.2),
Refractory Metals
4.1.9 Sampling (see 13.2),
4.1.10 Inspection witnessing (see 15.2),
3. Terminology
4.1.11 Certification requirements (Section 18), and
3.1 Definitions:
4.1.12 Packaging (Section 20),
1
This specification is under the jurisdiction of ASTM Committee B10 on
5. Materials and Manufacture
Reactive and Refractory Metals and Alloysand is the direct responsibility of
Subcommittee B10.03 on Niobium and Tantalum.
5.1 Materials covered by this specification shall be made
Current edition approved May 1, 2010. Published June 2010. Originally
from ingots in accordance with Specification B652/B652M.
approved in 1979. Last previous edition approved in 2004 as B655/B655M – 04.
DOI: 10.1520/B0655_B0655M-10.
5.2 The various niobium-hafnium alloy products covered by
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
this specification are formed with the conventional extrusion,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
forging, swaging, rolling, and drawing equipment normally
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. available in metal working plants.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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B655/B655M−10
TABLE 2 Additional Chemical Requirements for Finished
6. Chemical Composition
Product (When Specified by Purchaser)
6.1 The chemical composition of niobium-hafnium alloy
Niobium-Hafnium Alloy Grade R04295
ingots and billets for conversion to finished products covered
Content, Maximum
Element
by this specification shall conform to the requirements pre-
Weight %
scribed in
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:B655/B655M–04 Designation: B655/B655M – 10
Standard Specification for
Niobium-Hafnium Alloy Bar, Rod, and WireNiobium-Hafnium
1
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
1.1 This specification covers hafnium alloyed niobium bar, rod,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 inch-poundSI units or SIinch-pound units are to be regarded separately as standard. Within the
text, the SI units are shown in brackets. The values stated in each system aremay 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
specification. standard.
1.4 Thefollowingsafetyhazardscaveatpertainsonlytothetestmethodsportion,Section14,ofthisspecification: 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
2
2.1 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 Practice for Using
Significant Digits in Test Data to Determine Conformance with Specifications
E2626 Guide for Spectrometric Analysis of Reactive and Refractory Metals
3. Terminology
3.1 Definitions:
3.1.1 barlot, n—material less than 6 in. [150 mm] in width and 0.187 in. [4.8 mm] or greater in thickness, with a rectangular
or square cross section, supplied in straight lengths. —a lot is defined as that material produced from one ingot and heat treated
at the same conditions. Unless otherwise agreed between manufacturer and purchaser, a lot shall be limited to the product of an
8 h period for final continuous anneal or to a single furnace load for a final batch anneal.
3.1.2 lotbar, n—a lot is defined as that material produced from one ingot and heat treated at the same conditions. —a hot rolled,
forged, or cold worked semifinished solid section product whose cross sectional area is equal to or less than 16 sq in. [10.323 sq
mm]; rectangular bar must be less than or equal to 10 in. [254 mm] in width and greater than 0.187 in. [4.8 mm] in thickness.
1
3.1.3 rod, n—material 0.125 to 2 ⁄2 in. [3.2 to 64 mm] in diameter in round, hexagonal, or octagonal cross section supplied in
straight lengths.
3.1.4wire, n—material 0.020 to 0.1240.1875 in. [0.50 to 3.24.8 mm] in diameter furnished in coils, spools, or on reels. Material
less than 0.020 in. [0.50 mm] in diameter is not covered in this specification.
4. Ordering Information
4.1 Orders for material under this specification should include the following information as applicable:
4.1.1 General alloy description (see 1.2) and ASTM designation and year of issue,
1
This specification is under the jurisdiction of ASTM Committee B10 on Reactive and Refractory Metals and Alloys and is the direct responsibility of Subcommittee
B10.03 on Niobium and Tantalum.
Current edition approved May 1, 2004.2010. Published May 2004.June 2010. Originally approved in 1979. Last previous edition approved in 19962004 as
B655/B655M–96(1999).B655/B655M – 04. DOI: 10.1520/B0655_B0655M-104.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
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B655/B655M – 10
4.1.2 Quantity in weight or pieces,
4.1.3 Size, diameter, and length,
4.1.4 Chemical Composition (Section 6),
4.1.5 Temper (Section 7),
4.1.6 Mechanical test temperature and limits (Sections 8 and 14),
4.1.7 Permissible dimensi
...
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