For 40 wt.% Sn and 60 wt.% Pb alloy at 150 degree C, Find:

(1) what phases is/are present?

(2) What is/are the composition of the phases.

(1) Mass fraction

(2) volume fraction.

At 150 C, take the densities of Pb and Sn to be 11.23 and 7.24 g/cm3 .

Figure 9.9 The lead-tin phase diagram. For a 40 wt\% Sn-60 wt\% Pb alloy at 150C (point B ), phase compositions and relative amounts are compoted in Example Problems 9.2 and 9.3