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 niobium keep stable at present. Niobium tube is grouped into seamless tube and seamed niobium tube.
Material: RO4200-1, RO4210-2Diameter: φ1.0-100mmThickness: 0.2-5.0mmLength: 200mm-9000mm Standard: As per ASTM B394-98Purity: ≧99.9％ or 99.95％
Niobium tube has such properties as high melting point, good corrosion resistance and good processing properties.
Niobium tube is mainly used for spinning of thin tube blank, thermocouple cannula and other special purposes.
Material: RO4200-1, RO4210-2Diameter: φ1.0-100mmThickness: 0.2-5.0mmLength: 200mm-9000mm Standard: As per ASTM B394-98Purity: ≧99.9％ or 99.95％
Niobium tube has such properties as high melting point, good corrosion resistance and good processing properties.
Niobium tube is mainly used for spinning of thin tube blank, thermocouple cannula and other special purposes.
Table.1 Chemical composition:
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chemistry%
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designation
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chief component
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impurities maximum
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Nb
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Fe
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Si
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Ni
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W
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Mo
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Ti
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Ta
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O
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C
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H
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N
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Nb1
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Remainder
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0.004
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0.003
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0.002
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0.004
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0.004
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0.002
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0.07
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0.01
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0.004
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0.0012
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0.002
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Nb2
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Remainder
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0.005
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0.005
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0.005
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0.01
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0.01
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0.004
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0.1
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0.015
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0.01
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0.0015
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0.01
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Table 2. Mechanical requirements (annealed condition)
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Grade
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Tensile strength δbpsi (MPa), ≥
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Yield strength δ0.2, psi (MPa), ≥
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Elongation in 1"/2" gage length, ％, ≥
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RO4200-1
RO4210-2
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18000 (125)
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10500 (73)
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25
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Special requirements to be agreed on by the supplier and buyer of negotiations
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