Tantalum Alloy Rod made in China

Specifications

1.Introduction:

Tantalum is dark, dense, ductile, very hard, easily fabricated, and highly conductive of heat and electricity. The metal

is renowned for its resistance ,as the metal powder, is in the production of electronic components, mainly capacitors

and some high-power resistors. Tantalum electrolytic capacitors exploit the tendency of tantalum to form a protective

oxide surface layer, using tantalum powder, pressed into a pellet shape, as one "plate" of the capacitor, the oxide as

the dielectric, and an electrolytic solution or conductive solid as the other "plate". Because the dielectric layer can be

very thin (thinner than the similar layer in, for instance, an aluminium electrolytic capacitor), a high capacitance can

be achieved in a small volume. Because of the size and weight advantages, tantalum capacitors are attractive for

portable telephones, personal computers, and automotive electronics.

2.ASTM B 365 as follows:

 R05200, unalloyed tantalum, electron-beam furnace or vacuum-arc melt, or both,

 R05400, unalloyed tantalum, powder-metallurgy consolidation,

 R05255, tantalum alloy, 90 % tantalum 10 % tungsten, electron-beam furnace or vacuum-arc melt, or both,

 R05252, tantalum alloy, 97.5 % tantalum 2.5 % tungsten, electron-beam furnace or vacuum-arc melt, or both,

 R05240 tantalum alloy, 60 % tantalum 40 % columbium, electron-beam furnace or vacuum-arc melt, or both.

3.Permissible variations in diameter for rods

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