Niobium
Niobium and Niobium Alloy
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;
Chemical Composition
|
Element
|
R04200
|
R04210
|
|
C
|
0.01%max
|
0.01%max
|
|
N
|
0.01%max
|
0.01%max;
|
|
O
|
0.015%max
|
0.025%max
|
|
H
|
0.0015%max
|
0.0015%max
|
|
Zr
|
0.02%max
|
0.02%max
|
|
Ta
|
0.1%max
|
0.3%max
|
|
Fe
|
0.005%max
|
0.01%max
|
|
Si
|
0.005%max
|
0.005%max
|
|
W
|
0.03%max
|
0.05%max
|
|
Ni
|
0.005%max
|
0.005%max
|
|
Mo
|
0.010%max
|
0.020%max
|
|
Hf
|
0.02%max
|
0.02%max
|
|
Ti
|
0.02%max
|
0.03%max
|
SPECIFICATION
Niobium Foil Specifications
Specification: according to ASTM B393
|
Shape
|
Thickness (mm)
|
Width (mm)
|
Length (mm)
|
|
Foil
|
Min. 0.01
|
Max. 304.8
|
/
|
Niobium Plate / Board Specification
Size
|
Shape
|
Thickness (mm)
|
Width (mm)
|
Length (mm)
|
|
Plate/Board
|
Min. 1.0
|
Width Max. 1500
|
Long Max. 2000
|
Niobium Rod Niobium Bar Specification
Size
|
Shape
|
Diameter (mm)
|
/
|
Length (mm)
|
|
Rod/Bar
|
Min.5.0
|
/
|
Long Max. 6000
|
Niobium Tube/Pipe Specification
Size
|
Item
|
Outer Diameter: (mm)
|
Wall Thickness:（mm）
|
Length (mm)
|
|
Specification
|
Φ2.0-100mm
|
0.2-5.0mm
|
200mm-8000mm
|
