Niobium is a steel gray metal. Niobium and tantalum have approximate nature. Niobium is mainly used in metallurgy industry, atomic energy and aerospace industry, petroleum chemical industry, electronic industry and other departments. More than 80% of niobium is used in the production of steel. The
price of niobiumkeep stable at present. Niobium tube is grouped into seamless tube and seamed niobium tube.
Material: RO4200-1， RO4210-2
Standard: As per ASTM B394-98
Purity: ≧99.9％or 99.95％
Properties of niobium tube:
Niobium tubehas such properties as high melting point, good corrosion resistance and good processing properties.
Applications of niobium tube:
Niobium tube is mainly used for spinning of thin tube blank, thermocouple cannula and other special purposes.
Table.1 Chemical composition:
|designation||chief component||impurities maximum|
Table 2. Mechanical requirements (annealed condition)
|Grade||Tensile strength δbpsi (MPa)， ≥||Yield strength δ0.2， psi (MPa)，≥||Elongation in 1"/2" gage length， ％， ≥|
|18000 (125)||10500 (73)||
|Special requirements to be agreed on by the supplier and buyer of negotiations|