Niobium Tube

  • Niobium tube
  • Niobium pipe

Product Details

Niobium Tube Standard

All niobium and niobium alloys tube products follow standard ASTM B394, such as pure niobium tube (R04200, R04210), Nb1Zr tube (R04251 R04261), Nb10Zr , C-103, Cb-752, C129Y, FS-85, Nb-50Ti and so on.

Niobium Tube Technology

  • One of the niobium tube extrusion production method includes the following steps: preparation, a power frequency induction heating (600 + 10˚C), glass powder lubrication, secondary power frequency induction heating (1150 + 10˚C), reaming (reduction of area is not greater than 20.0%), thrid power frequency induction heating (1200 + 10˚C), small deformation, extrusion, extrusion ratio is not more than 10, reduction of area is not greater than 90%) and air cooling technology, finally the hot extrusion process of niobium tube is finished.

  • The niobium seamless tube produced by this method ensures sufficient thermal process plasticity. The disadvantage of niobium fluidity is avoided by means of small deformation extrusion. Performance and dimensions meet user requirements.

Niobium and Niobium Alloys Tube Grade and Standard
Category Country Grade Standard
Tube USA R04200, R04210, R04251, R04261 ASTM B394
Niobium and Niobium Alloys Tube Chemical Composition (wt%≤)
Element Niobium R04200 Niobium R04210 Nb-1%Zirconium R04251 Nb-1%Zirconium R04261
C 0.01 0.01 0.01 0.01
N 0.01 0.01 0.01 0.01
O 0.015 0.025 0.015 0.025
H 0.0015 0.0015 0.0015 0.0015
Zr 0.02 0.02 0.8 to 1.2 0.8 to 1.2
Ta 0.1 0.3 0.1 0.5
Fe 0.005 0.01 0.005 0.01
S 0.005 0.005 0.005 0.005
W 0.03 0.05 0.03 0.05
Ni 0.005 0.005 0.005 0.005
Mo 0.010 0.020 0.010 0.050
Hf 0.02 0.02 0.02 0.02
Ti 0.02 0.03 0.02 0.03
B 2ppm - 2ppm -
Al 0.002 0.005 0.002 0.005
Be 0.005 - 0.005 -
Cr 0.002 - 0.002 -
C 0.002 - 0.002 -
Niobium and Niobium Alloys Tube Dimension and Tolerance
Outer Diameter (D)/in (mm) Outer Diameter Tolerance/in (mm) Inner Diameter Tolerance/in (mm) Wall Thickness Tolerance/%
0.187 < D < 0.625 (4.7 < D < 15.9) ± 0.004 (0.10) ± 0.004 (0.10) 10
0.625 < D < 1.000 (15.9 < D < 25.4) ± 0.005 (0.13) ± 0.005 (0.13) 10
1.000 < D < 2.000(25.4 < D < 50.8) ± 0.0075 (0.19) ± 0.0075 (0.19) 10
2.000 < D < 3.000(50.8 < D < 76.2) ± 0.010 (0.25) ± 0.010 (0.25) 10
3.000 < D < 4.000(76.2 < D < 101.6) ± 0.0125 (0.32) ± 0.0125 (0.32) 10
The tolerance can be adjusted based on customer's request.

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