To create an aluminium - melting furnace, to melting temperature of the metal you are working with is a key factor in the type and size or wire needed. A chart is provided to assist you in your basic calculations. Aluminium and silver have higher melting temperatures than pewter, lead and tin. Exact melting temperatures for metals do depend on the alloy. This chart provides a reference to the furnace temperatures needed to melt aluminium materials. A furnace that can achieve the melting point for aluminium can be used to melt metals with lower temperature requirement.