The SMA490BW corrosion resistant steel strip chemical composition and application

After quenching and tempering, 40Cr alloy steel plate and SMA490BW corrosion resistant steel strip sheet have good comprehensive mechanical properties, good low temperature impact toughness and low notch sensitivity. The hardenability of steel SMA490BW corrosion resistant steel strip is good. It can be hardened to Ф28 ～ 60mm during water quenching and Ф15 ～ 40mm during oil quenching. In addition to quenching and tempering, this steel is also suitable for cyanidation and induction hardening. The cutting performance is better. When the hardness is HB174 ～ 229, the relative cutting workability is 60%. 40Cr alloy steel is suitable for making medium-sized plastic molds.

Tempering includes high temperature tempering, medium temperature tempering and low temperature tempering. Tempering means to reheat the SMA490BW corrosion resistant steel strip quenched steel to a certain temperature and then cool it in a certain way. Tempering can reduce or eliminate the internal stress produced by quenching, reduce the hardness and strength, and improve the ductility or toughness of steel. After SMA490BW corrosion resistant steel strip quenching, the workpiece should be tempered in time, and the required mechanical properties can be obtained through the combination of quenching and tempering.

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