ASTM B521-19 + Redline

Standard Specification for Tantalum and Tantalum Alloy Seamless and Welded Tubes

1.1 ,This specification covers tantalum and tantalum alloy seamless and welded tubes of the following grades:

1.1.1 ,UNS Grade R05400—,Unalloyed tantalum, powder-metallurgy consolidation,