Melting-point
The exact amount of heat at which metals and other substances become fused and lose their identity. (See FUSIBILITY.) The following gives the melting-points of the simple metals mentioned, but the melting-points of alloys are invariably below those of the simple metals composing them. (See FUSIBLE ALLOYS.) Cast iron melts at 3477 degrees; wrought iron, 3981; steel, 2501; gold, 2587; silver, 1250; copper, 2550; tin, 420; zinc, 741; brass, 1897; lead, 617; aluminum, and 700 degrees.