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Tantalum Rod

Description

Tantalum is a shiny, silvery colored metal which is heavy, dense, malleable and ductile when pure. It is found in small quantities in minerals (generally in conjunction with niobium), and is isolated by conversion to the oxide and then the fluoro-complex, K2TaF7, from which the pure metal is obtained by electrolysis. Tantalum is extremely corrosion resistant due to the formation of an oxide film, and is also resistant to acid attack (with the exception of HF). It will react with fused alkalis and a variety of non-metals at elevated temperatures.
Tantalum rod, also known as tantalum bar, can be used as laboratory apparatus which has to have good corrosion resistance, and is also used within the chemical industry for similar reasons.

Advantages of Tantalum Rod

1. Excellent corrosion resistance
2. High temperature strength
3. Easy to machine
4. Good biocompatibility

Performance of Tantalum Rod


Commodity Tantalum rod
Standard ASTM B393-98
Dimension ¢3~¢120mm
Material RO5200, RO5400, RO5252 (Ta-2.5W), RO5255 (Ta-10W)
Purity ≥99.9%

TableⅠ Chemical Composition of Tantalum Rod


Chemistry ppm
Description Chief component Impurities maximum
Ta Nb Fe Si Ni W Mo Ti O C H N
Ta1 Remainder 300 40 30 20 40 40 20 150 40 15 20
Ta2 Remainder 800 100 100 50 200 200 50 200 100 15 100
TaNb3 Remainder <35000 100 100 50 200 200 50 200 100 15 100
TaNb20 Remainder 170000- 230000 100 100 50 200 200 50 200 100 15 100
Ta2.5W Remainder 400 50 30 20 30000 60 20 150 50 15 60
Ta10W Remainder 400 50 30 20 110000 60 20 150 50 15 60

TableⅡ Permissible Variations in Diameter for Tantalum Rods


Diameter, inch (mm) Tolerance, +/-inch (mm)
0.125~0.187 excl (3.175~4.750) 0.003 (0.076)
0.187~0.375 excl (4.750~9.525) 0.004 (0.102)
0.375~0.500 excl (9.525~12.70) 0.005 (0.127)
0.500~0.625 excl (12.70~15.88) 0.007 (0.178)
0.625~0.750 excl (15.88~19.05) 0.008 (0.203)
0.750~1.000 excl (19.05~25.40) 0.010 (0.254)
1.000~1.500 excl (25.40~38.10) 0.015 (0.381)
1.500~2.000 excl (38.10~50.80) 0.020 (0.508)
2.000~2.500 excl (50.80~63.50) 0.030 (0.762)

TableⅢ Mechanical Requirements (Annealed Condition)


Rod, diameter 0.125" (3.18mm)~2.5" (63.5mm)
Grade Tensile strength, psi (MPa), ≥ Yield strength, psi (MPa), ≥ Elongation in 1 inch gage length, %, ≥
RO5200/RO5400 25000 (172) 15000 (103) 25
RO5252 40000 (276) 28000 (193) 20
RO5255 70000 (482) 55000 (379) 20
RO5240 40000 (276) 28000(193) 25
Note: 10" (254mm) gage length to 0.050"(1.27mm) diameter and 1" (25.4mm) or 2"(50.8mm) gage length over 0.050"(1.27mm) diameter Special requirements are to be agreed on by the negotiation of supplier and buyer.

Package and Transportation

We pack tantalum rod in plywood case and send them by ocean or air.