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Nickel:
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| Nickel
200 : Commercially pure wrought nickel for the construction
of chemical plant. |
| Nickel
201 : A low-carbon grade of nickel free from the stress-corrosion
cracking associated with graphitisation in chemical plant operating
at temperatures above 300`C, e.g. caustic soda plant. |
| Nickel
205 : A high purity nickel for anodes, plates and grids
of electronic valves and for magnetostrictive transducers. |
| Nickel
212 : Slightly stiffer than pure nickel. Used for electrode
support wires in radio valves and tungsten filament lamps. |
| Nickel
222 : A cathode nickel for the sleeves of indirectly heated,
oxide-coated cathodes in radio valves. |
| Nickel
270 : A High-purity nickel with a minimum temperature-coefficient
of resistance of 0.600/`C Over the range 0-100`C. Made by the
powder metallurgy process. Used for components of special valves
such as hydrogen thyratons and for electric resistance thermometers
and controls. F. |
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