Casting Tin Bronze C90300 Specification: ASTM B271, B505, B584, B763, SAE J461, 462, SAE-620,ASTM B143-1B Nominal Chemical Composition: Cu: 87.5% Sn: 8.2% Zn: 4% Mechanical Properties: Tensile Strength: min 44ksi Yield Strength: min 22ksi Elongation: min 18% Application: Bearing,bushings, pump impellors, piston rings, pump bodies, valves, steam fittings and gears.