ASTM B884-97

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn. Contact ASTM International (www.astm.org) for the latest information.
Designation: B 884 – 97
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Niobium-Titanium Alloy Billets, Bar, and Rod for
1
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.
1. Scope 3. Terminology
1.1 This specification covers niobium-titanium alloy billets, 3.1 Definitions of Terms Specific to This Standard:
bars, and rods, at 46 to 48 % titanium. This material is used in 3.1.1 bar—material greater than or equal to 2.5 in (60 mm)
the manufacture of wire for superconducting applications. and less than 6 in. (150 mm) in diameter.
1.2 The values stated in either inch-pound or SI units are to 3.1.2 billet—material greater than 6 in. (150 mm) in diam-
be regarded separately as standard. The values stated in each eter.
system are not exact equivalents; therefore each system must 3.1.3 lot—a lot shall consist of all material produced from
be used independent of the other; SI values cannot be mixed the same ingot at one time, with the same cross section and
with inch-pound values. SI units are stated in parentheses. with the same nominal metallurgical parameters.
1.3 The following precautionary caveat pertains only to the 3.1.4 Rod—material greater than 0.5 in. (13 mm) and less
test methods portion, Section 13, of this specification: This than 2.5 in (60 mm) in. diameter.
standard does not purport to address all of the safety concerns, 3.2 For the purpose of determining compliance with the
if any, associated with its use. It is the responsibility of the user specified limits of property requirements, an observed value or
of this standard to establish appropriate safety and health a calculated value shall be rounded in accordance with the
practices and determine the applicability of regulatory limita- rounding method of Practice E 29.
tions prior to use.
4. Ordering Information
2. Referenced Documents
4.1 Purchase orders for material under this specification
2.1 ASTM Standards:
should include:
E 29 Practice for Using Significant Digits in Test Data to 4.1.1 ASTM designation and year of issue,
2
Determine Conformance with Specifications 4.1.2 Quantity in weight, number of pieces, and dimensions,
E 92 Test Method for Vickers Hardness of Metallic Mate- 4.1.3 Marking (see Section 17),
3
rials 4.1.4 Packaging (see Section 18),
3
E 112 Test Methods for Determining Average Grain Size 4.1.5 Disposition of rejected material (see Section 15),
4
E 165 Test Method for Liquid Penetrant Examination 4.1.6 Surface texture, if required (see 10.3),
E 213 Practice for Immersed Ultrasonic Examination by the 4.1.7 Annealing condition, if different from 7.1,
4
Reflection Method Using Pulsed Longitudinal Waves 4.1.8 Permissible variations in length (see 9.2),
3
E 384 Test Method for Microhardness of Materials
4.1.9 Sampling and analytical methods, if required (see
2.2 ANSI Standard: 11.3),
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ANSI B46-1 Surface Texture 4.1.10 Inspection requirements (see Section 14),
4.1.11 Certification and report needs (see Section 16), and
2.3 ASNT Standard:
4.1.12 Additions to the specification and supplementary
ASNT SNT-TC-1A Personnel Qualification and Certifica-
6
requirements, if required.
tion in Nondestructive Testing
5. Materials and Manufacture
1 5.1 Materials covered by this specification shall be made
This specification is under the jurisdiction of ASTM Committee B-10 on
Reactive and Refractory Metals and Alloys and is the direct responsibility of from ingots which are produced by vacuum or plasma-arc
Subcommittee B10.03 on Niobium and Tantalum.
melting, electron beam furnace melting, or a combination of
Current edition approved Oct. 10, 1997. Published March 1998.
2 these methods. All melting is to be carried out in furnaces
Annual Book of ASTM Standards, Vol 14.02.
3
usually used for reactive metals.
Annual Book of ASTM Standards, Vol 03.01.
4
Annual Book of ASTM Standards, Vol 03.03.
5.2 The products covered by this specification are formed
5
Available from American National Standards Institute, 11 W. 42nd St., 13th
with conventional forging, swaging, rolling, extruding, and
Floor, New York, NY 10036.
6
drawing equipment normally available in metal working
Available from The American Society for Nondestructive Testing, Inc., 1711
Arlingate Lane, P. O. Box 28518, Columbus, OH 43228–0518 plants.
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B 884
TABLE 2 Grain Size Requirements
6. Chemical Composition
Rod, Bar, and
...