ASTM B708-12

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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 30-Nov-2012
• ICS: 77.150.99 - Other products of non-ferrous metals
• Technical Committee: B10 - Reactive and Refractory Metals and Alloys
• Drafting Committee: B10.03 - Niobium, Tantalum, and Vanadium

Relations

• Replaces: ASTM B708-05 - Standard Specification for Tantalum and Tantalum Alloy Plate, Sheet, and Strip
• Effective Date: 01-Dec-2012
• Replaced By: ASTM B708-12(2019) - Standard Specification for Tantalum and Tantalum Alloy Plate, Sheet, and Strip
• Effective Date: 01-Nov-2019
• Referred By: ASTM B898-20 - Standard Specification for Reactive and Refractory Metal Clad Plate
• Effective Date: 01-Dec-2012

Standards Content (Sample)

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:B708 −12
Standard Specification for
1
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 3.1.1 annealed material, n—plate, sheet, or strip that has
been annealed.
1.1 This specification covers unalloyed and alloyed tanta-
3.1.2 annealing (annealed), n—the act of heat treating to
lum plate, sheet, and strip as follows.
soften plate, sheet, or strip.
1.1.1 R05200, unalloyed tantalum, electron-beam furnace
or vacuum-arc melt, or both,
3.1.3 lot, n—all material produced from the same ingot or a
1.1.2 R05400, unalloyed tantalum, powder-metallurgy
single powder blend at one time with the same cross section,
consolidation,
and with the same nominal metallurgical parameters.
1.1.3 R05255, tantalum alloy, 90 % tantalum, 10 %
3.1.4 plate, n—a flat product more than 0.1853 in. (4.7 mm)
tungsten, electron-beam furnace of vacuum-arc melt, or both,
in thickness.
1.1.4 R05252, tantalum alloy, 97.5 % tantalum, 2.5 %
3.1.5 sheet, n—a flat product 6 in. (152.4 mm) or more in
tungsten, electron-beam furnace or vacuum-arc melt, or both,
width and from 0.005 in. (0.13 mm) to 0.1875 in. (4.76 mm) in
and
thickness.
1.1.5 R05240, tantalum alloy, 60 % tantalum, 40 %
niobium, electron-beam furnace or vacuum-arc melt. 3.1.6 strip, n—a flat product, may be supplied in coil, less
than 6 in. (152.4 mm) in width and from 0.005 in. (0.13 mm)
1.2 The values stated in inch-pound units are to be regarded
to 0.1875 in. (4.76 mm) in thickness.
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only
4. Classifications
and are not considered standard.
4.1 The strip, sheet or plate is to be furnished in the
1.3 This standard does not purport to address all of the
following grades:
safety and/or health problems, if any, associated with its use. It
4.1.1 R05200, unalloyed tantalum, electron-beam furnace
is the responsibility of the user of this standard to establish
or vacuum-arc melted, or both,
appropriate safety and health practices and determine the
4.1.2 R05400, unalloyed tantalum, powder-metallurgy
applicability of regulatory limitations prior to use.
consolidation,
4.1.3 R05255, tantalum alloy, 90 % tantalum, 10 %
2. Referenced Documents
tungsten, electron-beam furnace or vacuum-arc melted, or
2
2.1 ASTM Standards:
both,
E8 Test Methods for Tension Testing of Metallic Materials
4.1.4 R05252, tantalum alloy, 97.5 % tantalum, 2.5 %
E29 Practice for Using Significant Digits in Test Data to
tungsten, electron-beam furnace or vacuum-arc melted, or
Determine Conformance with Specifications
both,
E112 Test Methods for Determining Average Grain Size
4.1.5 R05240, tantalum alloy, 60 % tantalum, 40 %
niobium, electron-beam furnace or vacuum-arc melted, or
3. Terminology
both.
4.1.6 For sputtering application see supplemental require-
3.1 Definitions of Terms Specific to This Standard:
ments to grades R05200 and R05400.
5. Ordering Information
1
This specification is under the jurisdiction of ASTM Committee B10 on
Reactive and Refractory Metals and Alloys and is the direct responsibility of
5.1 Orders for material under this specification shall include
Subcommittee B10.03 on Niobium and Tantalum.
the following information as applicable:
Current edition approved Dec. 1, 2012. Published January 2013. Originally
5.1.1 Quantity (weight, number of pieces or other suitable
approved in 1982. Last previous edition approved in 2005 as B708 – 05. DOI:
10.1520/B0708-12.
measure of quantity),
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.1.2 Name of material (tantalum plate, sheet, or strip),
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
5.1.3 Grade (alloy and method of manufacture) (see 4.1.1 –
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 4.1.6),
Copyright ©ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA19428-2959. United States
1

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B708−12
5.1.4 ASTM Standard (Specification B708) and year of productasspecifiedinTable2foreachlotofmaterialsupplied.
issue, and The performance of this special provision shall be negotiated.
5.1.5 Additions to the specification and supplementary re-
8. Mechanical Properties
quirements if required.
8.1 Annealed materials supplied under this specification
6. Materials and Manufacture
shall conform to the requirements for mechanical properties as
6.1 Materia
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: B708 − 05 B708 − 12
Standard Specification for
1
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
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 % nobium,niobium, electron-beam furnace or vacuum-arc melt.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information
only.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 and health practices and determine the applicability of
regulatory limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
E8 Test Methods for Tension Testing of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E112 Test Methods for Determining Average Grain Size
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 annealed material, n—plate, sheet, or strip that has been annealed.
3.1.2 annealing (annealed), n—the act of heat treating to soften plate, sheet, or strip.
3.1.3 lot, n—all material produced from the same ingot or a single powder blend at one time with the same cross section, and
with the same nominal metallurgical parameters.
3.1.4 plate, n—a flat product more than 0.1853 in. (4.7 mm) in thickness.
3.1.5 sheet, n—a flat product 6 in. (152.4 mm) or more in width and from 0.005 in. (0.13 mm) to 0.1875 in. (4.76 mm) in
thickness.
3.1.6 strip, n—a flat product, may be supplied in coil, less than 6 in. (152.4 mm) in width and from 0.005 in. (0.13 mm) to
0.1875 in. (4.76 mm) in thickness.
4. Classifications
4.1 The strip, sheet or plate is to be furnished in the following grades:
4.1.1 R05200, unalloyed tantalum, electron-beam furnace or vacuum-arc melted, or both,
4.1.2 R05400, unalloyed tantalum, powder-metallurgy consolidation,
4.1.3 R05255, tantalum alloy, 90 % tantalum, 10 % tungsten, electron-beam furnace or vacuum-arc melted, or both,
1
This specification is under the jurisdiction of ASTM Committee B10 on Reactive and Refractory Metals and Alloys and is the direct responsibility of Subcommittee
B10.03 on Niobium and Tantalum.
Current edition approved Nov. 1, 2005Dec. 1, 2012. Published November 2005January 2013. Originally approved in 1982. Last previous edition approved in 20012005
as B708 – 01.B708 – 05. DOI: 10.1520/B0708-05.10.1520/B0708-12.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
B708 − 12
4.1.4 R05252, tantalum alloy, 97.5 % tantalum, 2.5 % tungsten, electron-beam furnace or vacuum-arc melted, or both,
4.1.5 R05240, tantalum alloy, 60 % tantalum, 40 % niobium, electron-beam furnace or vacuum-arc melted, or both.
4.1.6 For sputtering application see supplemental requirements to grades R05200 and R05400.
5. Ordering Information
5.1 Orders for material under this specification shall include the following information as applicable:
5.1.1 Quantity (weight, number of pieces or other suitable measure of quantity),
5.1.2 Name of material (tantalum plate, sheet, or strip),
5.1.3 Grade (alloy and method of manufacture) (see 4.1.1-4.1.6),
5.1.4 ASTM Standard (Specification B708) and year of issue, and
5.1.5 A
...