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A: Annie Fu

Tubo di niobio

Keywords:

Descrizione del prodotto

Materials R04200, R04210, R04251, R04261
Standard ASTM B394
In Form Round, Square, Coil, U shape
Size According To Customer Requirements Or Drawings
Length Standard & Cut Length
Surface Polished or According to Customer's Requirement
Packing Seaworthy Wooden Case
Technique Niobium Welded Tube, Niobium Seamless Tube
Applications:

Niobium tube and niobium pipe are in gray metal color with high strength and conductivity. They are used in steel, ceramics, electronics, nuclear energy and superconductors.

Feature:

High melting point, High-density, High temperature oxidation resistance, Long service life, Resistance to corrosion

Testing:

We can provide the following types of testing for niobium tube:

Eddy Current test

Flaring test

Flattening test

Mechanical test

Microstructure test

Ultrasonic test

Density 8.57 g/cm3
Melting Point 2468 ℃
Boiling Point 4742 ℃
Thermal Conductivity 0.537 W/cm/K @ 298.2 K
Electrical Resistivity 12.5 microhm-cm @ ℃
Electronegativity 1.6 Paulings
Specific Heat 0.064 Cal/g/K @ 25 ℃
Heat of Fusion 6.5 Cal/gm mole

Chemistry%
Grade Chief Impurities max
Nb Fe Si Ni W Mo Ti Ta O C H N
Nb1 Remainder 0.004 0.003 0.002 0.004 0. 004 0.002 0.07 0.01 0.004 0.0012 0.002
Nb2 Remainder 0.005 0.005 0.005 0.01 0.01 0 .004 0.1 0.015 0.01 0.0015 0.01
Special requirements to be agreed on by the supplier and buyer of negotitations

Grade(UNS) Annealed
Tensile strength min, Yield strength min, Elongation min,
psi (MPa) psi (MPa) % (1 inch gage length)
R04200 18000 (125) 10500 (73) 25
R04210 Welded 18000 (125) 8500 (59) 25
R04210 Seamless 18000 (125) 10500 (73) 25
R04251 28000(195) 18000(125) 20
R04261 28000(195) 18000(125) 20
Niobium and Niobium alloyed tubes and pipes
R04200 -- 1 TYPE -- Reactor class non-alloyed Niobium.
R04210 -- 2 TYPE -- Industrial class non-alloyed Niobium.
R04251 -- 3 TYPE -- Include 1% Zr reactor Niobium alloys.
R04261 -- 4 TYPE -- Include 1% Zr industrial Niobium alloyes.
UNS Designation R05400  -- non-alloyed Tantalum,powder metallurgy,concretion.
UNS Designation R05200  -- non-alloyed Tantalum,vacuum ARC melting.
UNS Designation R05252  -- Ta + 2.5% W alloys,vacuum ARC melting.
UNS Designation R05255  -- Ta + 10% W alloys,vacuum ARC melting.
UNS Designation R05240  -- Tantalum alloys, 60% Ta,40% Nb alloys,electron bombardment or vacuum ARC melting.or both.

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