Metal Melting

Approximate Energy Requirement (Hourly Demand)
Lead	0.045-0.097kWh/kg (70-150 BTU per lb) (9000F.)
Brass	1.74-1.93kWh/kg (2700-3000 BTU per lb)(1900-23000F.)
Aluminum	1.29-1.93kWh/kg (2000-3000 BTU per lb) (13500F.)
Tin	0.16kWh/kg (250 BTU per lb) (6500F.)
Zinc	0.32-0.39kWh/kg (500-600 BTU per lb) (800-9000F)
Cast lron	5.2-5.8kWh/kg (8000-9000 BTU per lb) (2600-27000F.)

	Specific Heat to Melting Point	Latent Heat of Fusion	Specific Heat of Liquid	Melting Point   oC	Total  Heat kWh/kg	Total Heat BTU/lb
Aluminum	0.25	170	0.252	1218	0.295	457
Copper	0.1	89	0.2	1981	0.187	290
Iron	0.16	89	0.15	2300	0.344	534
Lead	0.032	10	0.032	625	0.018	28
Tin	0.06	26	0.06	450	0.032	50
Zinc	0.1	48	0.12	790	0.077	120