Temper Condition: annealed
Chemical composition as per ASTM B393 -99 R04210
         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 : 
Niobium ribbon :Thickness 0.025 up to 0.50mm x width up to 1mm x coil on spool.
Niobium foil :     Thickness 0.1 to 1.0mm x width up to 150mm x R/L. 

Typical size :
Thickness 0.05mm x Width 100(+/-2)mm x Length 500mm for flat,
Thick 0.076mm x Width 5mm x R/L (approx. 500 gram/spool);
Thick 0.082mm x Width 8mm x R/L (approx. 500 gram/spool);
Thick 0.10mm x width 5mm x coil   (approx. 500 gram/spool);
Thick 0.12mm x Width 10mm x R/L (approx. 500 gram/spool);
Thick 0.15mm x Width 12mm x R/L (approx. 500 gram/spool);

Packing : roll in the plastic spool with vacuum container.

Standard Specification ASTM B 393 -05 for Niobium Ribbon, Niobium Alloy Ribbon, Niobium Strip, Niobium Alloy Strip, Niobium Foil, Niobium Alloy Foil, Niobium Sheet, Niobium Alloy Sheet, Niobium Plate, Niobium Alloy Plate.
This specification covers five grades of wrought Niobium Ribbon, Niobium Alloy Ribbon, Niobium Strip, Niobium Alloy Strip, Niobium Foil, Niobium Alloy Foil, Niobium Sheet, Niobium Alloy Sheet, Niobium Plate, Niobium Alloy Plate as follows: (Committee B10 has adopted "niobium" as the designation for Element No. 41, formerly named "columbium".)
1. ASTM B 393 -05 UNS R04200 -Type 1, Reactor grade unalloyed niobium;
2. ASTM B 393 -05 UNS R04210 -Type 2, Commercial grade unalloyed niobium;
3. ASTM B 393 -05 UNS R04251 -Type 3, Reactor grade niobium alloy containing 1% zirconium;
4. ASTM B 393 -05 UNS R04261 -Type 4, Commercial grade niobium alloy containing 1% zirconium;
5. ASTM B 393 -05 UNS R0xxxx  -Type 5, Residual Resistivity Ratio(RRR) grade pure niobium.
RRR values :  guaranteed min. RRR 300 *,    
* the Residual Resistivity Ratio RRR is defined as the ratio of electrical resistivity at 295K to electrical resistivity at 4,2K.