Manganese is the trade name for a copper alloy of 82-84% copper, 12-15% manganese and 2-4% nickel. It was first developed by Edward Weston.
Manganese has a very low thermoelectric voltage (2 μV / K) relative to copper and can therefore be used advantageously in electrical measuring instruments. Manganese foil and wire is used in the manufacture of electrical resistors, mainly shunt resistors for ampere meters, because the resistance changes very little with temperature and remains stable for a long time. Physical characteristics Resistance = 0.43 · 10 - 0.48 · 10Ω Temperatuurcoëfficiënt = 0,01·10 K Specific mass = 8.4 · 10 kg / m Linear expansion coefficient = 14 · 10 - 19 · 10 K at 20 ° C - 100 ° C Elasticiteitsmodulus = 124 — 159 GPa Melting point = 960 ° C Also see
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