ASTM B364-18

Standard Specification for Tantalum and Tantalum Alloy Ingots

ABSTRACT
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. The materials covered by this specification are classified according to types: R05200; R05400; R05255; R05252; and R05240. The ingot metal for types R05200, R05255, R05252, and R05240 may be prepared by vacuum-arc melting, electron beam furnace melting, or a combination of these two methods. The metal for type R05400 is defined as powder-metallurgy consolidation unalloyed tantalum. The material shall conform to the chemical composition requirements for carbon, oxygen, nitrogen, hydrogen, niobium, iron, titanium, tungsten, molybdenum, silicon, nickel, and tantalum.
SIGNIFICANCE AND USE
8.1 For the purpose of determining compliance with the specified limit for requirements of the properties listed in the tables, an observed value or a calculated value shall be rounded as indicated in accordance with the rounding method of Practice E29.
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 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

• Status: Published
• Publication Date: 31-Mar-2018
• 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

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:B364 −18
Standard Specification for
1
Tantalum and Tantalum Alloy Ingots
This standard is issued under the fixed designation B364; 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 Type (see 1.2),
3.1.2 Quantity in weight or pieces,
1.1 This specification covers unalloyed and alloyed tanta-
3.1.3 Size, diameter, and length,
lum ingots prepared by vacuum-arc melting, electron-beam
3.1.4 Method of manufacture (Section 4),
melting, or powder-metallurgy consolidation to produce con-
3.1.5 ASTM designation, and
solidated metal for processing to various mill shapes.
3.1.6 Additions to the specification and supplementary re-
1.2 The materials covered by this specification are:
quirements if required.
1.2.1 R05200, unalloyed tantalum, electron-beam furnace
or vacuum-arc melt, or both,
4. Materials and Manufacture
1.2.2 R05400, unalloyed tantalum, powder-metallurgy
4.1 The ingot metal for Type R05200 (unalloyed tantalum),
consolidation,
for Type R05255 (90 % tantalum 10 % tungsten alloy), Type
1.2.3 R05255,tantalumalloy,90 %tantalum10 %tungsten,
R05252 (97.5 % tantalum 2.5 % tungsten), and Type R05240
electron-beam furnace or vacuum-arc melt, or both,
(60 % tantalum 40 % columbium) may be vacuum-arc melted,
1.2.4 R05252, tantalum alloy, 97.5 % tantalum 2.5 %
electron-beam furnace melted, or a combination of these two
tungsten, electron-beam furnace or vacuum-arc melt, or both,
methods. The metal for Type R05400 is defined as powder-
and,
metallurgy consolidation unalloyed tantalum.
1.2.5 R05240 tantalum alloy, 60 % tantalum 40 %
columbium, electron-beam furnace or vacuum-arc melt, or
5. Chemical Composition
both.
5.1 The material shall conform to the requirements for
1.3 This international standard was developed in accor-
chemical composition in accordance with Table 1.
dance with internationally recognized principles on standard-
5.1.1 Analysis for elements not listed in Table 1 and not
ization established in the Decision on Principles for the
normally expected in tantalum shall not be required unless
Development of International Standards, Guides and Recom-
specified at time of purchase.
mendations issued by the World Trade Organization Technical
5.2 Intheeventofdisputeoverconformityofthematerialto
Barriers to Trade (TBT) Committee.
this specification, upon agreement between the purchaser and
the seller as to procedure, representative samples of the
2. Referenced Documents
material may be submitted to a referee for analysis.
2
2.1 ASTM Standards:
E29 Practice for Using Significant Digits in Test Data to
6. Permissible Variation
Determine Conformance with Specifications
6.1 Quantity—The permissible overshipment shall be nego-
tiated between the purchaser and the manufacturer.
3. Ordering Information
3.1 Orders for material under this specification shall include
7. Workmanship, Finish, and Appearance
the following information as applicable:
7.1 Themanufacturershallusecaretohaveeachlotofingot
material as uniform in quality as possible.
1
This specification is under the jurisdiction of ASTM Committee B10 on
7.2 When specified, the ingots shall be conditioned on the
Reactive and Refractory Metals and Alloys and is the direct responsibility of
surfacetostandardsagreeduponbetweenthemanufacturerand
Subcommittee B10.03 on Niobium and Tantalum.
Current edition approved April 1, 2018. Published May 2018. Originally
the purchaser.
approved in 1961. Last previous edition approved in 2009 as B364 – 96 (2009)
7.3 In the conditioned ingot, no abrupt change in diameter
which was withdrawn January 2018 and reinstated in April 2018. DOI: 10.1520/
B0364-18.
orlocaldepressionsthatwillimpairsubsequentfabricationwill
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
be permitted. The difference between maximum and minimum
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
radius of the conditioned ingot shall not exceed 20 % of the
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. maximum radius.
Copyright ©ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA19428-2959. United States
1

---------------------- Page: 1 ----------------------
B364−18
TABLE 1 Chemical Requirements
Content, max, weight %
Electron-Beam Cast Electron-Beam Cast Electron-Beam Cast
Electron-Beam Cast
(R05255) Vacuum-Arc (R05252) Vacuum-Arc (R05240) Vacuum-Arc
Element
...