Tubos de nióbio

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.