ASTM B365-98(2004)
(Specification)Standard Specification for Tantalum and Tantalum Alloy Rod and Wire
Standard Specification for Tantalum and Tantalum Alloy Rod and Wire
ABSTRACT
This specification covers unalloyed and alloyed tantalum rod and wire. The materials covered are: R05200, R05400, R05255, R05252, and R05240. These materials shall be made from vacuum-arc melted or electron-beam melted ingots or powder-metallurgy consolidated unalloyed tantalum. The chemical composition shall conform to the required contents of carbon, oxygen, nitrogen, hydrogen, niobium, iron, titanium, tungsten, molybdenum, silicon, nickel, and tantalum. Chemical analysis shall be made. Mechanical properties shall conform to the required tensile strength, yield strength, and elongation.
SCOPE
1.1 This specification covers unalloyed and alloyed tantalum rod and wire.
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.
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 problems, 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:B365 −98(Reapproved2004)
Standard Specification for
Tantalum and Tantalum Alloy Rod and Wire
This standard is issued under the fixed designation B365; 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. Terminology
1.1 This specification covers unalloyed and alloyed tanta- 3.1 Definitions of Terms Specific to This Standard:
lum rod and wire. 3.1.1 lot, n—all material produced from the same ingot or a
single powder blend at one time, with the same cross section
1.2 The materials covered by this specification are:
and with the same nominal metallurgical parameters.
1.2.1 R05200, unalloyed tantalum, electron-beam furnace
3.1.2 rod, n—material 0.125 to 2.5 in. (3.18 to 63.50 mm) in
or vacuum-arc melt, or both,
diameter in round, hexagonal, or octagonal cross section
1.2.2 R05400, unalloyed tantalum, powder-metallurgy
supplied in straight lengths.
consolidation,
1.2.3 R05255,tantalumalloy,90 %tantalum10 %tungsten,
3.1.3 wire, n—material 0.010 to 0.124 in. (0.254 to 3.15
electron-beam furnace or vacuum-arc melt, or both,
mm) in diameter furnished in coils or on spools or reels.
1.2.4 R05252, tantalum alloy, 97.5 % tantalum 2.5 %
Material less than 0.010 in. in diameter is not covered by this
tungsten, electron-beam furnace or vacuum-arc melt, or both,
specification.
and
4. Ordering Information
1.2.5 R05240 tantalum alloy, 60 % tantalum 40 %
columbium, electron-beam furnace or vacuum-arc melt, or
4.1 Orders for material under this specification shall include
both.
the following information as applicable:
4.1.1 Quantity (weight or number of pieces),
1.3 The values stated in inch-pound units are to be regarded
4.1.2 Name of material (tantalum rod or wire),
as the standard. The values given in parentheses are for
4.1.3 Type (see 1.2),
information only.
4.1.4 Method of manufacture (Section 5),
1.4 The following precautionary caveat pertains only to the
4.1.5 ASTM designation,
test methods portion, Section 13, of this specification: This
4.1.6 Finish and appearance (Section 9), and
standard does not purport to address all of the safety problems,
4.1.7 Additions to the specification and supplementary re-
if any, associated with its use. It is the responsibility of the user
quirements if required.
of this standard to establish appropriate safety and health
practices and determine the applicability of regulatory limita-
5. Materials and Manufacture
tions prior to use.
5.1 Material covered by this specification shall be made
from vacuum-arc melted or electron-beam melted ingots or
2. Referenced Documents
powder-metallurgy consolidated unalloyed tantalum.
2.1 ASTM Standards:
5.2 The various tantalum mill products covered by this
E8 Test Methods for Tension Testing of Metallic Materials
specification are formed with the conventional extrusion,
E29 Practice for Using Significant Digits in Test Data to
forming, swaging, rolling, and drawing equipment normally
Determine Conformance with Specifications
available in metal working plants.
6. Chemical Composition
This specification is under the jurisdiction of ASTM Committee B10 on
6.1 The tantalum and tantalum alloy ingots and the tantalum
Reactive and Refractory Metals and Alloys and is the direct responsibility of
powder-metallurgy consolidated ingots for conversion to fin-
Subcommittee B10.03 on Niobium and Tantalum.
ished products covered by this specification shall conform to
Current edition approved May 1, 2004. Published May 2004. Originally
the requirements for chemical composition as prescribed in
approved in 1961. Last previous edition approved in 1998 as B365 – 98. DOI:
10.1520/B0365-98R04.
Table 1.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.1.1 Analysis for elements not listed in Table 1 and not
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
normally expected in tantalum shall not be required unless
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. specified at time of purchase.
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B365−98(2004)
TABLE 1 Chemical Requirements
Content, max, weight%
Electron-Beam Electron-Beam Electron-Beam
Electron-Beam
Sintered Cast (R05255) Cast (R05252) Cast (R05240)
Cast (R05200)
Element
(R05400) Vacuum-Arc Cast Vacuum-Arc Cast Vacuum-Arc Cast
Vacuum-Arc Cast
Unalloyed (R05255) 90% (R05252) 97.5% (R05240) 60%
(R05200) Unalloyed
Tantalum Tantalum 10% Tantalum 2.5% Tantalum 40%
Tantalum
Tungsten Tungsten Columbium
C 0.010 0.010 0.010 0.010 0.010
O 0.015 0.03 0.015 0.015 0.020
N 0.010 0.010 0.010 0.010 0.010
H 0.0015 0.0015 0.0015 0.0015 0.0015
Nb 0.10 0.10 0.10 0.50 35.0–42.0
Fe 0.010 0.010 0.010 0.010 0.010
Ti 0.010 0.010 0.010 0.010 0.010
W 0.050 0.050 9.0–11.0 2.0–3.5 0.050
Mo 0.020 0.020 0.020 0.020 0.020
Si 0.005 0.005 0.005 0.005 0.005
Ni 0.010 0.010 0.010 0.010 0.010
Ta remainder remainder remainder remainder remainder
6.2 The manufacturer’s ingot analysis shall be considered 8.3.1 The permissible variation in cut lengths shall not
the chemical analysis for products supplied under this specifi-
exceed a total of 0.25 in. (6.35 mm).
cation.
8.3.2 The permissible variation in straightness of rounds
6.3 When requested by the purchaser at the time of shall not exceed 0.050 in. (1.27 mm)/ft (304.8 mm) in any
purchase, the seller shall furnish a report certifying the values length.
ofcarbon,oxygen,nitrogen,andhydrogenasspecifiedinTable
8.4 Quantity or Weight—For orders requiring up to 100 lb
2 for each lot of material supplied. The performance of this
(45.4 kg), the manufacturer may overship by 10 %. When the
special provision will be negotiated.
order is for quantities up to 500 lb (226.8 kg), the manufacturer
may overship by 5 %. The permissible overship for quantities
7. Mechanical Properties
larger than this shall be negotiated between the purchaser and
7.1 Materials supplied under this specification shall con-
the manufacturer.
form to the requirements for mechanical properties as specified
in Table 3.
9. Workmanship, Finish, and Appearance
7.2 The performance of mechanical tests to this requirement
9.1 The finished rod and wire shall be free of injurious
will be negotiated at time of purchase.
external and internal imperfections of a nature that will
8. Dimensions, Mass, and Permissible Variations
interfere with the purpose for which it is intended in accor-
dance with standards of acceptability agreed upon between the
8.1 Tolerances on Rounds—Tolerances on tantalum and
manufacturer and the purchaser.
tantalum alloy round products covered by this specification
shall be as specified in Table 4.
9.2 Material may be finished as forged, rolled, swaged,
8.2 Tolerances for Square, Rectangular, or Other Shapes—
drawn in the as-cleaned, as-machined, or as-ground conditions.
Tolerances for forged or rolled square, rectangular, or other
The manufacturer shall be permitted to remove minor surface
shapes shall be as agreed upon between purchaser and seller at
imperfections provided such removal does not reduce the
the time of purchase.
dimensions below the minimum permitted by the tolerances
8.3 Other Tolerances and Limitations: established in Section 8 of this specification.
TABLE 2 Additional Chemical Requirements for Finished Product (When Specified by the Purchaser)
Content, max, % weight Grades
Electron-Beam Case Electron-Beam Cast Electron-Beam-Cast Electron-Beam Cast
Element (R05200) Vacuum- Sintered (R05400) (R05255) Vacuum- (R05252) Vacuum- (R05240) Vacuum-
Arc Cast (R05200) Unalloyed Arc Cast (R05255) Arc Cast (R05252) Arc Cast (R05240)
Unalloyed Tantalum 90% Tantalum 97.5% Tantalum 60% Tantalum
Tantalum 10% Tungsten 2.5% Tungsten 40% Columbium
O 0.025 0.035 0.025 0.025 0.025
N 0.010 0.010 0.010 0.010 0.010
H 0.0015 0.0015 0.0015 0.0015 0.0015
C 0.020 0.020 0.020 0.020 0.020
B365−98(2004)
TABLE 3 Mechanical Properties for Rod and Wire, Annealed Condition
Rod
0.125 in. (3.18 mm) to 2.5 in. (63.5 mm) Diameter
Elongation,
Ultimate Tensile Strength, min, psi Yield Strength, min,% 1 in.
(MPa) min, psi (MPa) (25.4 mm)
Gage Length
Unalloyed tantalum (R05200 and R05400) 25000 (172) 15000 (103) 25
97.5% tantalum 2.5% tungsten (R05252) 40000 (276) 28000 (193) 20
90% tantalum 10% tungsten R05255 70000
...
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