... 5. Ra1.0, Polish Ra0.4 Piston casting used for industrial clutch and brakes.1. Material: ASTM C-1362;2. Sand ... , ASTM C-1500;2. Typical products:Scaffold fittings, Template parts, Railway fittings, ring flange , electromagnetic steel cover, piston, pressure plate, center ... , alloy ironAluminumASTM A356, A360, A380, ADC12 etc. Piston Casting for industrial clutch