ASTM B521-12
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Standard Specification for Tantalum and Tantalum Alloy Seamless and Welded Tubes
ASTM International , 12/01/2012
Pages: 4
1.1This specification covers tantalum and tantalum alloy seamless and welded tubes of the following grades:
1.1.1UNS Grade R05400-Unalloyed tantalum, powder-metallurgy consolidation,
1.1.2UNS Grade R05200-Unalloyed tantalum, vacuum melted,
1.1.3UNS Grade R05252-Tantalum + 2.5 % tungsten alloy, vacuum melted.
1.1.4UNS Grade R05255-Tantalum + 10 % tungsten alloy, vacuum melted.
1.1.5UNS Grade R05240-Tantalum alloy, 60 % tantalum, 40 % niobium, electron-beam furnace or vacuum arc melt, or both.
1.2The 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.
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