ASTM B884-01
(Specification)Standard Specification for Niobium-Titanium Alloy Billets, Bar and Rod for Superconducting Applications
Standard Specification for Niobium-Titanium Alloy Billets, Bar and Rod for Superconducting Applications
SCOPE
1.1 This specification covers niobium-titanium alloy billets, bars, and rods, at 46 to 48% titanium. This material is used in the manufacture of wire for superconducting applications.
1.2 The values stated in either inch-pound or SI units are to be regarded separately as standard. The values stated in each system are not exact equivalents; therefore, each system must be used independent of the other; SI values cannot be mixed with inch-pound values. SI units are stated in parentheses.
1.3 The following precautionary caveat pertains only to the test methods portion, Section 13, 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: B 884 – 01
Standard Specification for
Niobium-Titanium Alloy Billets, Bar, and Rod for
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Superconducting Applications
This standard is issued under the fixed designation B 884; 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 (e) indicates an editorial change since the last revision or reapproval.
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1. Scope tion in Nondestructive Testing
1.1 This specification covers niobium-titanium alloy billets,
3. Terminology
bars, and rods, at 46 to 48 % titanium. This material is used in
3.1 Definitions of Terms Specific to This Standard:
the manufacture of wire for superconducting applications.
3.1.1 bar—material greater than or equal to 2.5 in (60 mm)
1.2 The values stated in either inch-pound or SI units are to
and less than 6 in. (150 mm) in diameter.
be regarded separately as standard. The values stated in each
3.1.2 billet—material greater than 6 in. (150 mm) in diam-
system are not exact equivalents; therefore each system must
eter.
be used independent of the other; SI values cannot be mixed
3.1.3 lot—a lot shall consist of all material produced from
with inch-pound values. SI units are stated in parentheses.
the same ingot at one time, with the same cross section and
1.3 The following precautionary caveat pertains only to the
with the same nominal metallurgical parameters.
test methods portion, Section 13, of this specification: This
3.1.4 Rod—material greater than 0.5 in. (13 mm) and less
standard does not purport to address all of the safety concerns,
than 2.5 in (60 mm) in. diameter.
if any, associated with its use. It is the responsibility of the user
3.2 For the purpose of determining compliance with the
of this standard to establish appropriate safety and health
specified limits of property requirements, an observed value or
practices and determine the applicability of regulatory limita-
a calculated value shall be rounded in accordance with the
tions prior to use.
rounding method of Practice E 29.
2. Referenced Documents
4. Ordering Information
2.1 ASTM Standards:
4.1 Purchase orders for material under this specification
E 29 Practice for Using Significant Digits in Test Data to
2 should include:
Determine Conformance with Specifications
4.1.1 ASTM designation and year of issue,
E 92 Test Method for Vickers Hardness of Metallic Mate-
3 4.1.2 Quantityinweight,numberofpieces,anddimensions,
rials
3 4.1.3 Marking (see Section 17),
E 112 Test Methods for Determining Average Grain Size
4 4.1.4 Packaging (see Section 18),
E 165 Test Method for Liquid Penetrant Examination
4.1.5 Disposition of rejected material (see Section 15),
E 214 Practice for Immersed Ultrasonic Examination by the
4 4.1.6 Surface texture, if required (see 10.3),
Reflection Method Using Pulsed Longitudinal Waves
3 4.1.7 Annealing condition, if different from 7.1,
E 384 Test Method for Microhardness of Materials
4.1.8 Permissible variations in length (see 9.2),
2.2 ANSI Standard:
5 4.1.9 Sampling and analytical methods, if required (see
ANSI B46-1 Surface Texture
11.3),
2.3 ASNT Standard:
4.1.10 Inspection requirements (see Section 14),
ASNT SNT-TC-1A Personnel Qualification and Certifica-
4.1.11 Certification and report needs (see Section 16), and
4.1.12 Additions to the specification and supplementary
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requirements, if required.
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.
5. Materials and Manufacture
Current edition approved Nov. 10, 2001. Published January 2002. Originally
5.1 Materials covered by this specification shall be made
published as B 884 - 97. Last previous edition B 884 - 97.
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Annual Book of ASTM Standards, Vol 14.02. from ingots which are produced by vacuum or plasma-arc
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Annual Book of ASTM Standards, Vol 03.01.
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Annual Book of ASTM Standards, Vol 03.03.
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Available from The American Society for Nondestructive Testing, Inc., 1711
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B 884
TABLE 2 Grain Size Requirements
melting, electron beam furnace melting, or a combination of
these methods. All melting is to be carried out in furnaces Rod, Bar, and Billet Grain Size Number
Diameter in. (mm) (weighted average)
usually used for reactive metals.
0.5 to 2 (13 to 50) 4.5 or finer
5.2 The products covered by this specification are formed
2.1 to 4.5 (50.1 to 115) 2.5 o
...
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