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By certification 
Baoji Refractory Metal Developer Co.,Ltd is one of the leading China niobium tube manufacturers and suppliers, and as a professional company we have productive factory, welcome to wholesale niobium tube, niobium pipe products from us.
² Chemical Composition:
Chemistry % | ||||||||||||||
Grade |
Nb |
Impurities max |
||||||||||||
Zr |
Ti |
C |
N |
O |
H |
Ta |
Fe |
Si |
W |
Ni |
Mo |
Cr |
||
Nb1 |
Remainder |
0.02 |
0.002 |
0.01 |
0.015 |
0.015 |
0.001 |
0.10 |
0.005 |
0.005 |
0.03 |
0.005 |
0.010 |
0.002 |
Nb2 |
Remainder |
0.02 |
0.005 |
0.02 |
0.05 |
0.025 |
0.005 |
0.25 |
0.03 |
0.02 |
0.05 |
0.01 |
0.050 |
0.01 |
² Specification：Φ2mm~Φ100mm×0.2~5.0mm×L<1300
² Tolerance：
|
Outside diameter, inch (mm) |
OD tolerance, inch(mm), +/- |
ID tolerance, inch(mm), +/- |
Permissible variation in wall thickness, %, +/- |
≥0.187~0.625(4.7-15.9) |
0.004 (0.010) |
0.004 (0.010) |
10 |
≥0.625~1.000(15.9-25.4) |
0.005 (0.13) |
0.005 (0.13) |
10 |
≥1.000~2.000(25.4-50.8) |
0.0075 (0.19) |
0.0075 (0.19) |
10 |
≥2.000~3.000(50.8-76.2) |
0.010(0.25) |
0.010(0.25) |
10 |
≥3.000~4.000(76.2-101.6) |
0.0125 (0.32) |
0.0125 (0.32) |
10 |
Note:Special demands on tolerance available. | |||
