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