Home > Products > Materials > Refractory Metals >

Niobium




Properties
 
Niobium is a rare kind of metal with high melting point, high boiling point, steel grey color and lustre, ductility and corrosion

resistance.  

Niobium melting point is 2468 ℃, boiling point is 4742 ℃, the density is 8.57 8.57g／cm³,Niobium is used in the thermal

protection and structural material in the aviation, aerospace industry. It is also used in the vacuum tube and other

electric vacuum devices, superconducting material, heat resistant alloy and hard alloy, etc.
 
Niobium Alloy Strip,Plate And Thick Plate
 


Chemical Composition
 

Element R04200-Type 1 Reactor Grade Unalloyed Niobium R04210-Type 2 Commercia Grade Unalloyed Niobium 3R04251-Type 3 Reactor Gradeniobium Alloy Containing 1 % Zirconium R04261-Type 4 Commercial Gradeniobium Alloy Containing 1 % Zirconium
5
（3RHigh Purity Niobium Superconducting Level 
R0xxxx
Maximum Content%（Unless Otherwise Specified）
Per spindle          
Carbon 0.01 0.01 0.01 0.01 0.0030
Nitrogen 0.01 0.01 0.01 0.01 0.0030
Oxygen 0.015 0.025 0.015 0.025 0.0040
Hydrogen 0.0015 0.0015 0.0015 0.0015 0.0005
Zirconium 0.02 0.02 0.8~1.2 0.8~1.2 0.010
Tantalum  0.1 0.3 0.1 0.5 0.1
Iron 0.005 0.01 0.005 0.01 0.005
Silicon 0.005 0.005 0.005 0.005 0.005
Tungsten 0.03 0.05 0.03 0.05 0.007
Nickel 0.005 0.005 0.005 0.005 0.003
Molybdenum 0.010 0.020 0.010 0.050 A
Hafnium 0.02 0.02 0.02 0.02 A
Titanium 0.02 0.03 0.02 0.03 0.005
Boron 2ppm … 2ppm …  
Aluminum 0.002 0.005 0.002 0.002 0.005
Beryllium 0.005 … 0.005 …  
Chromium 0.002 … 0.002 … B
Cobalt 0.002 … 0.002 … B
A.Above the specified limit is suitable for 3 R is larger than 260 
 
B.All metal residues will be analyzed. If specified, maximum should be 0.005%. Residue

refers to the inherent few elements in the metal or alloy in the process of manufacturing

without intentions to add.

Niobium Alloy Seamless And Welded Tubes
 

 

Chemical Composition
 

Element

R04200-Type
 1 Reactor

Gradeunalloyed
 Niobium

R04210-Type 2  Commercial 
Adeun Alloyed
 Niobium

3R04251-Type 3 Reactor Grade

Niobiumalloy
Containing

 1 %Zirconium

R04261-Type 4 

Commercialgrade Niobium 
Alloy Containing 1 %

 Zirconium
Maximum Content%（Unless Otherwise Specified）
Per spindle  
Carbon 0.01 0.01 0.01 0.01
Nitrogen 0.01 0.01 0.01 0.01
Oxygen 0.015 0.025 0.015 0.025
Hydrogen 0.0015 0.0015 0.0015 0.0015
Zirconium 0.02 0.02 0.8~1.2 0.8~1.2
Titanium 0.1 0.2 0.1 0.2
Iron 0.005 0.01 0.005 0.01
Silicon 0.005 0.005 0.005 0.005
Tungsten 0.03 0.05 0.03 0.05
Nickel 0.005 0.005 0.005 0.005
Molybdenum 0.010 0.010 0.010 0.010
Hafnium 0.02 0.02 0.02 0.02
Boron 2ppm … 2ppm …
Aluminum 0.002 0.005 0.002 0.005
Beryllium 0.005 … 0.005 …
Chromium 0.002 … 0.002 …
Cobalt 0.002 … 0.002 …

A. If specified, the maximum content of all the residual elements from every metal will to 

be analyzed should be 0.004%. Residue refers to the inherent few elements in the metal 

or alloy in the process of manufacturing without intentions to add.