Specs : according to ASTM B392 -99 R04210
Chemical composition :
            C                 0.01%max
            N                 0.01%max
            O                 0.025%max
            H                 0.0015%max
            Zr                0.02%max
            Ta               0.3%max
            Fe               0.01%max
            Si                0.005%max
            W                0.05%max
            Ni                0.005%max
            Mo               0.02%max
            Hf                0.02%max
            Ti                0.03%max
            Al                0.005%max
Physical & Mechanical property :
            Tensile strength 125 MPa min.
            Yield strength    73 MPa min.
            Elongation         20%min
Size available: 
Dia 0.30mm up to 6.0mm x coil / spool

Typical size :
Ø 0.30 mm x coil;
Ø 0.50 mm x coil;
Ø 0.70 mm x coil ;
Ø 0.90 mm x coil ;
Ø 1.0 mm x coil;
Ø 1.5 mm x coil;
Ø 1.61mm x coil;
Ø 2.0 mm x coil ;
Ø 3.0 mm x coil ;
Ø 5.0 mm x coil ;
Ø 6.0 mm x coil ;

Trade name :  niobium wire, niobium filament, niobium wires, niobium filaments, nb wire, nb wires, nb filaments, columbium wire, columbium wires, cb wire, cb wires, precision niobium wire, niobium fine wire, precision niobium wires, niobium fine wires.