ASTM B655/B655M-10(2018)

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
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.
Refractory Metals (Withdrawn 2017)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,
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),
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.
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
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 Purchaser)
Niobium-Hafnium Alloy Grade R04295
5. Materials and Manufacture
Content, Maximum
Element
5.1 Materials covered by this specification shall be made
Weight %
from ingots in accordance with Specification B652/B652M.
Oxygen 0.035
Carbon 0.015
5.2 The various niobium-hafnium alloy products covered by
Nitrogen 0.010
this specification are formed with the conventional extrusion,
Hydrogen 0.0015
forging, swaging, rolling, and drawing equipment normally
available in metal working plants.
6. Chemical Composition
9. Permissible Variations
6.1 The chemical composition of niobium-hafnium alloy
9.1 Tolerances on Rounds—Tolerances on niobium-hafnium
ingots and billets for conversion to finished products covered
alloy round products covered by this specification shall be as
by this specification shall conform to the requirements pre-
prescribed in Table 4.
scribed in Table 1. Analysis for elements, not listed in Table 1
9.2 Tolerances for Square, Rectangular, or Other Shapes—
and not normally expected in niobium-hafnium alloy, shall not
Tolerances for forged or rolled square, rectangular, or other
be required unless specified at time of purchase.
shapes shall be as agreed upon between the purchaser and
6.2 The manufacturer’s ingot analysis shall be considered
manufacturer at the time of purchase.
the chemical analysis for products supplied under this specifi-
9.3 Other Tolerances and Limitations:
cation.
9.3.1 The permissible variation in cut lengths shall not
6.3 When specified in the purchase order, the manufacturer
exceed a total of ⁄4 in. [6.5 mm].
shall test the product for elements specified in Table 2. The
9.3.2 The permissible variation in straightness of rounds
results of the tests shall meet the limits shown in Table 2.
shall not exceed 0.050 in. [1.25 mm] per foot [300 mm] in any
length.
7. Temper Designations
9.4 Quantity or Weight—For orders up to 100 ft [30 m] the
7.1 Unless otherwise stated, the materials supplied under
manufacturer may overship up to 20 %. For orders up to 1000
this specification shall be in the annealed condition, defined as
lb [450 kg] or 1000 ft [300 m], the manufacturer may overship
at least 90 % recrystallized.
up to 10 %. The permissible overshipment for orders larger
7.2 Other temper designations, such as cold-worked temper
than this quantity shall be negotiated at the time of purchase.
or a stress-relieved temper may be specified in the purchase
order.
10. Quality and Finish
10.1 Niobium-hafnium alloy bar and wire shall be free of
8. Mechanical Requirements
injurious external and internal imperfections of a nature that
8.1 Materials in the annealed condition supplied under this
will interfere with the purpose for which it is intended.
specification shall conform to the requirements for mechanical
Material may be finished as forged, rolled, swaged, drawn; in
properties as prescribed in Table 3. Unless otherwise specified
a cleaned, machined, or ground condition. The manufacturer
inthepurchase,thematerialsshallconformtotherequirements
shall be permitted to remove minor surface imperfections
for room temperature mechanical properties. In lieu of or in
provided such removal does not reduce the dimensions below
addition to the room temperature properties, the purchaser may
the minimum permitted by the tolerances in accordance with
specify elevated temperature mechanical properties in the
Section 9.
purchase order.
10.2 Test methods for these defects and standards of accept-
ability shall be as agreed upon between the purchaser and the
manufacturer at the time of purchase.
TABLE 1 Chemical Requirements (Ingot)
11. Retests
Niobium-Hafnium Alloy Grade R04295
Content, Maximum
11.1 If any sample or specimen exhibits obvious surface
Element Weight %,
...