... 4,SAE, ISO accepted 1. Production specification: cw1.0, cw1.5, cw2.02. Chemical Composition of the products: C 0.45 ... %, P ≤0.04%3. Hardness: cw1.0: 51-53HRC cw1.5: 41-45HRC cw2.0: 51-53HRC Density: 7.8g/cucm4 ... manufacturer, ship builder, auto and locomotive manufacturer and stone mill.5. Microstructure: Tempered Marten site High strength, durable Ervin life: Steel ...