Abstract
1. The most promising conductor alloys were the binary ones with 0.12% Cr or 0.2% Zr and the trinary alloys with 0.2% Cr, 0.15% Cd or 0.15% Cr and 0.10% Zr. Their room temperature yield strength was 16–23 and the tensile strength 29–36 kg/sq. mm, the elongation, 21–24% and the electrical conductivity, 88–95% of that of plain M0 copper. 2. This property level remained stable after heating at 200°C/1000 hrs. 3. A yield strength of 14–18 kg/sq.mm, a tensile strength of 20–31 kg/sq.mm and an elongation of 20–29% were retained at 220°C. 4. For full-scale trials, the alloy of copper M0 with 0.15–0.3% Cr should be considered first. 5. For heavy-duty conductor elements for service at 250–350°C, an alloy of M0 copper with 0.15–0.2 Cr and 0.1–0.2 Zr is best.
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