high-strength SIC crucibles: Material: Sic, graphite Application Range: For melting gold, silver, copper and brass, alumina, Pb. Zn, etc,and medium-C steel, and varieus rave metals. Applicable Fuumacces: Coke furnaces, fuel furnaces, natural gas furnaces, electric furnaces. Indultionfurnaces. Lifetime: For A1 and various A1 alloys, the lifetime can achieve 3 months. Sizes: 0.5#2500#