Material:  Niobium tubing, Niobium tube, Niobium tubes
Specs : according to ASTM B394 -99 R04210
Temper condition: As drawn, annealed and seamless
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        85 MPa min.
            Elongation             25%min 
Size available : 
1.0 up to 4.0 mm Outer Diameter x 0.23 up to 0.35 mm Wall Thickness x 1 meters max. Length
in conformity with ASTM B394 -99 R04210. 

Typical size :
1.04mm OD x 0.23mm Wall thickness x 700mm (theoretical weight=0.0035 kg/pc);
1.46mm OD x 0.25mm Wall thickness x 1000mm(theoretical weight=0.008 kg/pc);
1.6256mm OD x 0.25mm Wall thickness x 762mm up to 1000mm(theoretical weight=0.0068 to 0.009 kg/pc);
1.727mm OD x 0.25mm Wall thickness x 1016mm minimum length(theoretical weight=0.010 kg/pc);
1.75mm OD x 0.25mm Wall thickness x 1016mm (theoretical weight=0.010 kg/pc);
2.0mm OD x 0.25mm Wall thickness x 1016mm minimum length(theoretical weight=0.0122 kg/pc);
2.15mm OD x 0.25mm Wall thickness x 1016mm minimum length(theoretical weight=0.013 kg/pc);
3.0mm OD x 0.25mm Wall thickness x 1000mm; (theoretical weight=0.019 kg/pc);
3.1mm OD x 0.25mm Wall thickness x 762mm up to 1000mm(theoretical weight=0.019 kg/pc);
3.4mm OD x 0.25mm  Wall thickness x 1016mm; (theoretical weight=0.021 kg/pc);
3.9mm OD x 0.254mm to 0.35mm Wall thickness x 1000mm(theoretical weight=0.025 to 0.033 kg/pc);
4.0mm OD x 0.25mm Wall thickness x Length
4.0mm OD x 0.254mm Wall thickness x 1000mm(theoretical weight=0.026 kg/pc);
4.0mm OD x 0.35mm Wall thickness x 1000mm; (theoretical weight=0.034 kg/pc);

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Standard Specification ASTM B 394 -03 for Niobium Tube + Niobium Alloy Tube Seamless and Welded.
This specification covers niobium and niobium alloy seamless and welded tubes of the following grades:
1. ASTM B 394 -03 UNS R04200 -Type 1, Reactor grade unalloyed niobium;
2. ASTM B 394 -03 UNS R04210 -Type 2, Commercial grade unalloyed niobium;
3. ASTM B 394 -03 UNS R04251 -Type 3, Reactor grade niobium alloy containing 1% zirconium;
4. ASTM B 394 -03 UNS R04261 -Type 4, Commercial grade niobium alloy containing 1% zirconium;