ASTM B708-12(2019)
(Specification)Standard Specification for Tantalum and Tantalum Alloy Plate, Sheet, and Strip
Standard Specification for Tantalum and Tantalum Alloy Plate, Sheet, and Strip
ABSTRACT
This specification covers the standard requirements for tantalum and tantalum alloy plate, sheet, and strip in the following grades: R05200, R05400, R05255, R05252, and R05240. The various tantalum mill products covered by this specification shall be formed with the conventional extrusion, forging, and rolling equipment normally available in metal working plants. Materials shall be made from vacuum-arc or electron-beam melted ingots or powder metallurgy consolidated unalloyed tantalum and shall be supplied in the annealed condition. Chemical analysis shall be conducted to determine the chemical composition of the materials which shall conform to the requirements for carbon, oxygen, nitrogen, hydrogen, iron, molybdenum, niobium, nickel, silicon, titanium, tungsten, and tantalum. The mechanical properties of the materials shall also meet the specified tensile strength, yield strength, and elongation limits as shall be determined by a longitudinal or transverse tension test method.
SCOPE
1.1 This specification covers unalloyed and alloyed tantalum plate, sheet, and strip as follows.
1.1.1 R05200, unalloyed tantalum, electron-beam furnace or vacuum-arc melt, or both,
1.1.2 R05400, unalloyed tantalum, powder-metallurgy consolidation,
1.1.3 R05255, tantalum alloy, 90 % tantalum, 10 % tungsten, electron-beam furnace of vacuum-arc melt, or both,
1.1.4 R05252, tantalum alloy, 97.5 % tantalum, 2.5 % tungsten, electron-beam furnace or vacuum-arc melt, or both, and
1.1.5 R05240, tantalum alloy, 60 % tantalum, 40 % niobium, electron-beam furnace or vacuum-arc melt.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address all of the safety and/or health problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:B708 −12 (Reapproved 2019)
Standard Specification 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 E8 Test Methods for Tension Testing of Metallic Materials
[Metric] E0008_E0008M
1.1 This specification covers unalloyed and alloyed tanta-
E29 Practice for Using Significant Digits in Test Data to
lum plate, sheet, and strip as follows.
Determine Conformance with Specifications
1.1.1 R05200, unalloyed tantalum, electron-beam furnace
E112 Test Methods for Determining Average Grain Size
or vacuum-arc melt, or both,
1.1.2 R05400, unalloyed tantalum, powder-metallurgy
3. Terminology
consolidation,
1.1.3 R05255, tantalum alloy, 90 % tantalum, 10 %
3.1 Definitions of Terms Specific to This Standard:
tungsten, electron-beam furnace of vacuum-arc melt, or both,
3.1.1 annealed material, n—plate, sheet, or strip that has
1.1.4 R05252, tantalum alloy, 97.5 % tantalum, 2.5 %
been annealed.
tungsten, electron-beam furnace or vacuum-arc melt, or both,
3.1.2 annealing (annealed), n—the act of heat treating to
and
soften plate, sheet, or strip.
1.1.5 R05240, tantalum alloy, 60 % tantalum, 40 %
3.1.3 lot, n—all material produced from the same ingot or a
niobium, electron-beam furnace or vacuum-arc melt.
single powder blend at one time with the same cross section,
1.2 The values stated in inch-pound units are to be regarded
and with the same nominal metallurgical parameters.
as standard. The values given in parentheses are mathematical
3.1.4 plate, n—a flat product more than 0.1853 in. (4.7 mm)
conversions to SI units that are provided for information only
in thickness.
and are not considered standard.
3.1.5 sheet, n—a flat product 6 in. (152.4 mm) or more in
1.3 This standard does not purport to address all of the
width and from 0.005 in. (0.13 mm) to 0.1875 in. (4.76 mm) in
safety and/or health problems, if any, associated with its use. It
thickness.
is the responsibility of the user of this standard to establish
3.1.6 strip, n—a flat product, may be supplied in coil, less
appropriate safety, health, and environmental practices and
than 6 in. (152.4 mm) in width and from 0.005 in. (0.13 mm)
determine the applicability of regulatory limitations prior to
to 0.1875 in. (4.76 mm) in thickness.
use.
1.4 This international standard was developed in accor-
4. Classifications
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
4.1 The strip, sheet or plate is to be furnished in the
Development of International Standards, Guides and Recom-
following grades:
mendations issued by the World Trade Organization Technical
4.1.1 R05200, unalloyed tantalum, electron-beam furnace
Barriers to Trade (TBT) Committee.
or vacuum-arc melted, or both,
4.1.2 R05400, unalloyed tantalum, powder-metallurgy
2. Referenced Documents
consolidation,
2
2.1 ASTM Standards:
4.1.3 R05255, tantalum alloy, 90 % tantalum, 10 %
tungsten, electron-beam furnace or vacuum-arc melted, or
both,
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This specification is under the jurisdiction of ASTM Committee B10 on 4.1.4 R05252, tantalum alloy, 97.5 % tantalum, 2.5 %
Reactive and Refractory Metals and Alloys and is the direct responsibility of
tungsten, electron-beam furnace or vacuum-arc melted, or
Subcommittee B10.03 on Niobium and Tantalum.
both,
Current edition approved Nov. 1, 2019. Published November 2019. Originally
4.1.5 R05240, tantalum alloy, 60 % tantalum, 40 %
approved in 1982. Last previous edition approved in 2012 as B708 – 12. DOI:
10.1520/B0708-12R19.
niobium, electron-beam furnace or vacuum-arc melted, or
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
both.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
4.1.6 For sputtering application see supplemental require-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. ments to grades R05200 and R05400.
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B708−12 (2019)
5. Ordering Information 7.2 The manufacturer’s ingot (or powder metallurgy con-
solidated bar) analysis may be considered the chemical analy-
5.1 Orders for material under this specification shall include
sis for products supp
...
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