What is the density of solid aluminum at the melting temperature? What is the density of liquid aluminum at the melting temperature? What is the solidification shrinkage for pure aluminum? What is the melting temperature of the Al-11.6%Si alloy? What is the density of solid Al-11.6%Si alloy at the melting temperature? What is the density of liquid Al-11.6%Si alloy at the melting temperature? What is the solidification shrinkage for the Al-11.6%Si alloy? Why are Al-Si alloys one of the most popular foundry alloys?