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.

Standard Specification ASTM B 392 -03 for Niobium rod + Niobium Alloy Rod + Niobium Wire + Niobium Alloy Wire.
This specification covers Niobium rod + Niobium Alloy Rod + Niobium Wire + Niobium Alloy Wire of the following grades:
1. ASTM B 392 -03 UNS R04200 -Type 1, Reactor grade unalloyed niobium;
2. ASTM B 392 -03 UNS R04210 -Type 2, Commercial grade unalloyed niobium;
3. ASTM B 392 -03 UNS R04251 -Type 3, Reactor grade niobium alloy containing 1% zirconium;
4. ASTM B 392 -03 UNS R04261 -Type 4, Commercial grade niobium alloy containing 1% zirconium;
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Standard Specification ASTM B 391 -03 for Niobium Ingots + Niobium Alloy Ingots.
This specification covers Niobium Ingots + Niobium Alloy Ingots of the following grades:
1. ASTM B 391 -03 UNS R04200 -Type 1, Reactor grade unalloyed niobium;
2. ASTM B 391 -03 UNS R04210 -Type 2, Commercial grade unalloyed niobium;
3. ASTM B 391 -03 UNS R04251 -Type 3, Reactor grade niobium alloy containing 1% zirconium;
4. ASTM B 391 -03 UNS R04261 -Type 4, Commercial grade niobium alloy containing 1% zirconium;