21. 327 C Temperature (C 300- 200 a + L 18.3 200 Composition (at% 50 60 0 A 100 + B 40 100 Composition at S (5) A Pb-Sn

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21 327 C Temperature C 300 200 A L 18 3 200 Composition At 50 60 0 A 100 B 40 100 Composition At S 5 A Pb Sn 1 (36.57 KiB) Viewed 11 times

21. 327 C Temperature (C 300- 200 a + L 18.3 200 Composition (at% 50 60 0 A 100 + B 40 100 Composition at S (5) A Pb-Sn alloy of 85 wt% Sn is cooled to 182 °C. What % of the solid will be primary B and what % will be the eutectic structure? A. Primary B: 35.7% Eutectic: 64.3% Eutectic: 16.1% B. Primary B: 83.9% C. Primary B: 64.3% Eutectic: 35.7% D. Primary B: 16.1% Eutectic: 83.9% 163 C Liquid 61.9 407 40 43 100 60 232 C B+L 97.8 600 500 RE 400 300 200 100 Temperature (FI