ASTM B708-05

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Designation:B708 −05
StandardSpecification for
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Tantalum and Tantalum Alloy Plate, Sheet, and Strip
This standard is issued under the fixed designation B708; 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 3.1.2 annealing (annealed), n—the act of heat treating to
soften plate, sheet, or strip.
1.1 This specification covers unalloyed and alloyed tanta-
3.1.3 lot, n—all material produced from the same ingot or a
lum plate, sheet, and strip as follows.
single powder blend at one time with the same cross section,
1.1.1 R05200, unalloyed tantalum, electron-beam furnace
and with the same nominal metallurgical parameters.
or vacuum-arc melt, or both,
1.1.2 R05400, unalloyed tantalum, powder-metallurgy
3.1.4 plate, n—a flat product more than 0.1853 in. (4.7 mm)
consolidation,
in thickness.
1.1.3 R05255, tantalum alloy, 90 % tantalum, 10 %
3.1.5 sheet, n—a flat product 6 in. (152.4 mm) or more in
tungsten, electron-beam furnace of vacuum-arc melt, or both,
width and from 0.005 in. (0.13 mm) to 0.1875 in. (4.76 mm) in
1.1.4 R05252, tantalum alloy, 97.5 % tantalum, 2.5 %
thickness.
tungsten, electron-beam furnace or vacuum-arc melt, or both,
3.1.6 strip, n—a flat product, may be supplied in coil, less
and
than 6 in. (152.4 mm) in width and from 0.005 in. (0.13 mm)
1.1.5 R05240, tantalum alloy, 60 % tantalum, 40 % nobium,
to 0.1875 in. (4.76 mm) in thickness.
electron-beam furnace or vacuum-arc melt.
1.2 The values stated in inch-pound units are to be regarded
4. Classifications
as the standard. The values given in parentheses are for
4.1 The strip, sheet or plate is to be furnished in the
information only.
following grades:
1.3 This standard does not purport to address all of the
4.1.1 R05200, unalloyed tantalum, electron-beam furnace
safety and/or health problems, if any, associated with its use. It
or vacuum-arc melted, or both,
is the responsibility of the user of this standard to establish
4.1.2 R05400, unalloyed tantalum, powder-metallurgy
appropriate safety and health practices and determine the
consolidation,
applicability of regulatory limitations prior to use.
4.1.3 R05255, tantalum alloy, 90 % tantalum, 10 %
tungsten, electron-beam furnace or vacuum-arc melted, or
2. Referenced Documents
both,
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2.1 ASTM Standards:
4.1.4 R05252, tantalum alloy, 97.5 % tantalum, 2.5 %
E8 Test Methods for Tension Testing of Metallic Materials
tungsten, electron-beam furnace or vacuum-arc melted, or
E29 Practice for Using Significant Digits in Test Data to
both,
Determine Conformance with Specifications
4.1.5 R05240, tantalum alloy, 60 % tantalum, 40 %
E112 Test Methods for Determining Average Grain Size
niobium, electron-beam furnace or vacuum-arc melted, or
both.
3. Terminology
4.1.6 For sputtering application see supplemental require-
3.1 Definitions of Terms Specific to This Standard:
ments to grades R05200 and R05400.
3.1.1 annealed material, n—plate, sheet, or strip that has
been annealed. 5. Ordering Information
5.1 Orders for material under this specification shall include
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This specification is under the jurisdiction of ASTM Committee B10 on
the following information as applicable:
Reactive and Refractory Metals and Alloys and is the direct responsibility of
5.1.1 Quantity (weight, number of pieces or other suitable
Subcommittee B10.03 on Niobium and Tantalum.
measure of quantity),
Current edition approved Nov. 1, 2005. Published November 2005. Originally
5.1.2 Name of material (tantalum plate, sheet, or strip),
approved in 1982. Last previous edition approved in 2001 as B708 – 01. DOI:
10.1520/B0708-05.
5.1.3 Grade (alloy and method of manufacture) (see
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
4.1.1-4.1.6),
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.1.4 ASTM Standard (Specification B708) and year of
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. issue, and
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B708−05
5.1.5 Additions to the specification and supplementary re- 8. Mechanical Properties
quirements if required.
8.1 Annealed materials supplied under this specification
shall conform to the requirements for mechanical properties as
6. Materials and Manufacture
specified in Table 3. No mechanical property requirements for
6.1 Material covered by this specification shall be made
unannealed (not heat treated) plate, sheet, or strip have been
from vacuum-arc melted or electron-
...