Conclusions
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1.
For the manufacture of accurate resistors in instruments we recommend a ternary alloy with 9% Mn and 4% Sn. After a vacuum anneal at 570°C (10−2mm Hg) its specific resistance is 0.36 Ωsq. mm/m. The thermal coefficient of resistivity at 15–30°C is about 2×10−6 and its TEMF in pair with copper (0–100°C) is 0. The strength, elongation and hardness of this alloy are the same as in classical manganine.
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2.
Of the quaternary alloys studied, the best electrical properties were possesed by one with about 11% Mn, 0.35% Sn and 0.3% Si. After 30% cold work it hasρ=0.42Ω sq.mm/ m.α 15–30=0 and E0–100°C=0.8μv/°C.
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3.
The scatter of TEMF, tensile strength, elongation and microhardness indicates that the alloys studied were relatively homogeneous. Their other properties, important for accurate resistors, and especially their stability in time, their strain sensitivity, and their technological properties, should be studied in more detail.
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Mes'kin, V.S., Popova, L.A. Development of alloys for precision resistors in the Cu-Mn-Sn system. Met Sci Heat Treat 3, 149–152 (1961). https://doi.org/10.1007/BF00810564
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DOI: https://doi.org/10.1007/BF00810564