Material:    Tantalum ring
Temper condition: annealed
Specs   :    acc. to ASTM B 365 - 98 R05200.
Chemical composition: 
                O                   0.0150   %max
                C                   0.0100   %max
                N                   0.0100   %max
                H                   0.0015   %max
                Fe                  0.0100   %max
                Ti                   0.0100   %max
                Ni                   0.0100   %max
                Si                   0.0050   %max
                Mo                 0.0200   %max
                W                  0.0500   %max
                Nb                 0.1000   %max
                Ta                 Remainder
Size :   38-300mm OD x 5-20mm Wall thickness x 1-20mm thickness.