ASTM B521 Tantalum Tube

Type:Tantalum Tube
Materials: RO5200, RO5400, RO5252(Ta2.5W), RO5255(Ta10W), RO5240(Ta40Nb)
Size: Diameter: ∅1.0~∅150mm  Length: 200-6500mm
Wall Thickness(WT): 0.2-10mm
Standard: ASTM B521
Surface: Polished

Tantalum and tantalum alloy products

Material properties

Tantalum and tantalum alloy (such as Ta-2.5W, Ta-10W, ta-40nb, etc.) pipes have the characteristics of high melting point, corrosion resistance and good cold working performance.

Standard

• Tantalum Plate/Sheet – ASTM B708
• Tantalum Foil & Strip – ASTM B708
• Tantalum Tube – ASTM B521
• Tantalum Pipe – ASTM B521
• Tantalum Bar & Billet – ASTM B364
• Tantalum Rod & Wire – ASTM B365

The product application

Pipe materials are widely used in chemical industry, high temperature technology field and atomic energy industry, mainly used in the manufacture of chemical process reaction vessels and heat exchangers, pipes, condensers, bayonet heaters, spiral coils, U-shaped tubes, thermocouples and their protection tubes, liquid metal containers and pipes, etc. (Executive standard: ASTMB521-98).
Rod material is widely used in aviation and aerospace industry, high temperature technology, atomic energy industry and chemical industry, mainly used to make supersonic aircraft, rocket engine, spacecraft combustion chamber parts, high-temperature furnace parts, nitric acid, sulfuric acid, hydrochloric acid corrosion parts and so on. (Executive standard: ASTMB365-98).

Product specification

Tantalum and tantalum alloy tubes.

Chemical composition

The element	RO5200	RO5400	RO5252	RO5255	RO5240
	%, not greater than (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	allowance	allowance	allowance	allowance	allowance

Note ① : Chemical composition is indicated by chemical composition of ingot.
Note ② : It can be produced according to user’s requirements.

Mechanical properties (annealed state)

category	Tensile strength Sigma b, psi (MPa), or greater	Yield strength, Sigma, 0.2 psi (MPa), or greater	Elongation, mark distance 1 “or 2” Delta, %, p
RO5200/RO5400	30000 (207).	20000 (138).	25
RO5252	40000 (276).	28000 (193).	20
RO5255	70000 (481).	60000 (414).	15
RO5240	40000 (276).	28000 (193).	20

Specifications and tolerances

Nominal diameter in.(mm)	The outside diameter tolerance In. (mm), plus or minus	The wall thickness tolerance %, plus or minus
< 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

Bending

Length,ft(m)	Maximum bending in.(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)	A quarter (6.4)
> 10 (3.05)	1/4 in. / 10 ft. (2.1 mm/m)

Other Performance Tests

If the customer has specific provisions in the order, the pipe pressure test and other nondestructive testing tests, seamless pipe flaring performance test and welding pipe reverse flattening performance test can be carried out.

Tolerance of Tantalum Tubing

OD, inch(mm)	Diameter Tolerance, inch(mm), +/-	Permissible Variation in wall thickness, %, +/-
＜1(25.4)	0.004(0.102)	5
1-1.5(25.4-38.1)	0.005(0.127)	5
1.5-2(38.1-50.8)	0.006(0.152)	5
2-2.5(50.8-63.5)	0.007(0.178)	5
2.5-3.5(63.5-88.9)	0.010(0.254)	5

Tantalum Welded Tubing Vs Seamless Tubing Comparison
	Advantages	Disadvantages	Specification
Welded Tube	1) The wall thickness is even and the inner surface is of good quality.	1) Poor flexibility, not suitable for producing more specifications but less quantities.	Usually suitable for the production of large quantities
	2) High production efficiency and low cost.	2) Welds are usually the weak links.
	3) Easy to produce large diameter tubing.	3) Welds are difficult to clean.
	4) Short lead time.	4) The ellipticity is not easy to control.
	5) Easy to control product quality.	5) High requirement for the dimension precision of strip.
Seamless Tube	1) Can produce small size tube and capillary tube.	1) Difficult to control wall thickness uniformity.	Usually suitable for the production of small quantities but various specifications
	2) Good flexibility, suitable for producing small quantities but various specifications.	2) Long lead time and low yield.
	3) The performance of the whole tube is uniform.	3) Complex equipment and large investment.
		4) Difficult to produce large size tubes.

China Tantalum Tube Manufacturer www.steeljrv.com offers ASTM B521 Tantalum Tube.