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Bare Copper
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Soft annealed bare copper complies with A. S. T. M. B3.
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Tinned Copper
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Soft tinned copper complies with A. S. T. M. B33.
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Silver Plated
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Minimum of 40 micro-inches of silver. For use where the wires are subjected to temperatures exceeding 200°C or if special corrosion resistance is required.
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Nickel Plated
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Minium of 50 micro-inches of nickel. For use where the wires are subjected to temperatures up to 450°C or if special corrosion resistance is required.
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Stainless Steel
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Wires conform to MIL-W-423, composition 304. For use where wires are subjected to temperatures up to 650°C or where mechanical strength and protection are important considerations.
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Aluminum
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Alclad 5056 aluminum alloy. Higher resistance to corrosion.