Tantalum and Tantalum Alloy Tubes

1. Usage
As a high melting point metal, Ta possesses a low vapour pressure and good electrical and thermal conductivity up to very high temperature. The advantages of Ta are excellent corrosion resistance, high high-temperature strength, good machinability and good biocompatibility.
Tantalum and Ta-Alloy are mainly used for Heat Exchangers, Shell and Tube Heaters, Bayonet Heaters, Condensers, vessel liners, Sputtering Targets, Cathode Protection Systems for steel structures such as bridges, water tanks, Corrosion Resistant Fasteners, High Temperature Furnace Parts, Nuclear Reactors, Aircraft and Missile Parts.

2. Standard
ASTMB521－98

3. Specification & Tolerance (mm)

Nominal Diameter Inch (mm)	Tolerance of Outside Diameter inch (mm), ±	Tolerance of Wall Thickness %, ±
＜1（25.4）	0.004(0.102)	10
1～1.5(25.4～38.1)	0.005(0.127)	10
1.5～2(38.1～50.8)	0.006(0.152)	10
2～2.5(50.8～63.5)	0.007(0.178)	10
2.5～3.5(63.5～88.9)	0.010(0.254)	10

4. Chemical composition

Element	RO5200	RO5400	RO5252	RO5255	RO5240
	%,max
C	0.0100	0.010	0.010	0.010	0.010
N	0.0100	0.010	0.0100	0.010	0.010
H	0.0015	0.0015	0.0015	0.0015	0.0015
O	0.0150	0.030	0.0150	0.015	0.020
Nb	0.1000	0.10	0.5000	0.10	35.0～42.0
Mo	0.0200	0.020	0.0200	0.020	0.020
W	0.0500	0.050	2.0～3.5	9.0～11.0	0.050
Ti	0.0100	0.010	0.0100	0.010	0.010
Si	0.0050	0.005	0.0050	0.005	0.005
Fe	0.0100	0.010	0.0100	0.010	0.010
Ni	0.0100	0.010	0.0100	0.010	0.010
Ta	Balance	Balance	Balance	Balance	Balance

5.Mechanical property (annealed)

Mechanical property	RO5200 /RO5400	RO5252	RO5255	RO5240
Tensile strength psi(MPa),min.	30000 (207)	40000 (276)	70000 (481)	40000 (276)
Yield strength psi(MPa),min.	20000 (138)	28000 (193)	60000 (414)	28000 (193)
Unit extension, δ,% scale distance 1 inch(25.4mm) or 2 inch(50.8mm),min.	25	20	15	20

6. Degree of curvature

Length, inch(m)	Maximum camber, inch(mm)
>3～6(0.91～1.83)	1/8(3.2)
>6～8(1.83～2.44)	3/16(4.8)
>8～10(2.44～3.05)	1/4(6.4)
>10(3.05)	1/4inch, 10inch(2.1mm/m)

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