... :1% Al: 0.01% Si:0.01% Rem:Copper Mechanical properties :This COPPER ALLOY BC2 has a good grinding of cutting performance and ... used in the manufacture of the main frame, gears, bushings, bush, take over the mouth and flange, rocker arm, guided valve ... structural strength and wear-resistant parts Gunmetal JIS BC-2 copper alloy casting Bronze Rod And Bar