FJ$11$

$11.30$ wt$\%$ Pb $70$ wt$\%$ Sn $250$ C $27$ C $()($i$)$ hypoeutectic $$ hypereutectic $($ii$)($iii$)183$ C $+$ AT $($iv$)1830-$ AT $?($v$)(\%$Sn$)801004060($wt$\%$ Sn$)($Pb$)($Sn$)$ Q$2($a$)$ Plumbum$-$Stanum Phase Diagram