ASTM B708-12(2019)

Annotation of standard text ASTM B708-12(2019) :

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.


Keywords:
tantalum, tantalum niobium alloy, tantalum plate, tantalum sheet, tantalum strip, tantalum tungsten alloy, Ta-2.5 %W, Ta-10 %W, Ta-40 %Nb,, ICS Number Code 77.150.99 (Other products of non-ferrous metals)