ASTM B364-96
(Specification)Standard Specification for Tantalum and Tantalum Alloy Ingots
Standard Specification for Tantalum and Tantalum Alloy Ingots
SCOPE
1.1 This specification covers unalloyed and alloyed tantalum ingots prepared by vacuum-arc melting, electron-beam melting, or powder-metallurgy consolidation to produce consolidated metal for processing to various mill shapes.
1.2 The materials covered by this specification are:
1.2.1 R05200, unalloyed tantalum, electron-beam furnace or vacuum-arc melt, or both,
1.2.2 R05400, unalloyed tantalum, powder-metallurgy consolidation,
1.2.3 R05255, tantalum alloy, 90% tantalum 10% tungsten, electron-beam furnace or vacuum-arc melt, or both,
1.2.4 R05252, tantalum alloy, 97.5% tantalum 2.5% tungsten, electron-beam furnace or vacuum-arc melt, or both, and,
1.2.5 R05240 tantalum alloy, 60% tantalum 40% columbium, electron-beam furnace or vacuum-arc melt, or both.
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
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Designation: B 364 – 96
Standard Specification for
Tantalum and Tantalum Alloy Ingots
This standard is issued under the fixed designation B 364; 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 for Type R05255 (90 % tantalum 10 % tungsten alloy), Type
R05252 (97.5 % tantalum 2.5 % tungsten), and Type R05240
1.1 This specification covers unalloyed and alloyed tanta-
(60 % tantalum 40 % columbium) may be vacuum-arc melted,
lum ingots prepared by vacuum-arc melting, electron-beam
electron-beam furnace melted, or a combination of these two
melting, or powder-metallurgy consolidation to produce con-
methods. The metal for Type R05400 is defined as powder-
solidated metal for processing to various mill shapes.
metallurgy consolidation unalloyed tantalum.
1.2 The materials covered by this specification are:
1.2.1 R05200, unalloyed tantalum, electron-beam furnace
5. Chemical Composition
or vacuum-arc melt, or both,
5.1 The material shall conform to the requirements for
1.2.2 R05400, unalloyed tantalum, powder-metallurgy con-
chemical composition in accordance with Table 1.
solidation,
5.1.1 Analysis for elements not listed in Table 1 and not
1.2.3 R05255, tantalum alloy, 90 % tantalum 10 % tungsten,
normally expected in tantalum shall not be required unless
electron-beam furnace or vacuum-arc melt, or both,
specified at time of purchase.
1.2.4 R05252, tantalum alloy, 97.5 % tantalum 2.5 % tung-
5.2 In the event of dispute over conformity of the material to
sten, electron-beam furnace or vacuum-arc melt, or both, and,
this specification, upon agreement between the purchaser and
1.2.5 R05240 tantalum alloy, 60 % tantalum 40 % colum-
the seller as to procedure, representative samples of the
bium, electron-beam furnace or vacuum-arc melt, or both.
material may be submitted to a referee for analysis.
1.3 The values stated in inch-pound units are to be regarded
as the standard. The values given in parentheses are for
6. Permissible Variation
information only.
6.1 Quantity—The permissible overshipment shall be nego-
2. Referenced Documents tiated between the purchaser and the manufacturer.
2.1 ASTM Standards:
7. Workmanship, Finish, and Appearance
E 29 Practice for Using Significant Digits in Test Data to
2 7.1 The manufacturer shall use care to have each lot of ingot
Determine Conformance with Specifications
material as uniform in quality as possible.
3. Ordering Information 7.2 When specified, the ingots shall be conditioned on the
surface to standards agreed upon between the manufacturer and
3.1 Orders for material under this specification shall include
the purchaser.
the following information as applicable:
7.3 In the conditioned ingot, no abrupt change in diameter
3.1.1 Type (see 1.2),
or local depressions that will impair subsequent fabrication will
3.1.2 Quantity in weight or pieces,
be permitted. The difference between maximum and minimum
3.1.3 Size, diameter, and length,
radius of the conditioned ingot shall not exceed 20 % of the
3.1.4 Method of manufacture (Section 4),
maximum radius.
3.1.5 ASTM designation, and
7.4 Each ingot shall be tested for soundness by nondestruc-
3.1.6 Additions to the specification and supplementary re-
tive test methods, such as dye penetrant and ultrasonic tests.
quirements if required.
Methods and acceptance standards shall be as mutually agreed
4. Materials and Manufacture upon between the purchaser and the manufacturer.
7.5 Defects in the ingots that exceed the acceptance stan-
4.1 The ingot metal for Type R05200 (unalloyed tantalum),
dards shall be removed by cropping or surface conditioning,
whichever is appropriate. The manufacturer shall be permitted
This specification is under the jurisdiction of ASTM Committee B-10 on
to remove surface imperfections provided that after each
Reactive and Refractory Metals and Alloysand is the direct responsibility of
removal the requirements of conditioning are met (see 7.3).
Subcommittee B10.03on Niobium and Tantalum.
7.6 The ingots shall be free of imperfections that would be
Current edition approved Oct. 10, 1996. Published December 1996. Originally
deemed injurious by the standards of acceptability agreed upon
published as B 364 – 61 T. Last previous edition B 364 – 92.
Annual Book of ASTM Standards, Vol 14.02.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has
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