Niobium Tube

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.

The technological process for niobium tube extrusion production: preparation, power frequency induction heating (600 + 10˚C), glass powder lubrication, secondary power frequency induction heating (1150 + 10˚C), reaming (reduction of area is less than 20.0%), third power frequency induction heating (1200 + 10˚C), small deformation, extrusion(extrusion ratio is not more than 10, and reduction of area is less than 90%) , air cooling, and finally finished the hot extrusion process of niobium tube.

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.