High strength RINA grade B corrugated bulkhead steel alloy steel

High strength RINA grade B corrugated bulkhead steel alloy steel

30CrMnSiA steel is a grade of alloy structural steel. The steel has high strength and poor welding performance. It is a high-strength quenched and tempered structural steel with high strength and sufficient toughness after quenching and tempering, and good hardenability. It has good workability, small processing deformation and good fatigue resistance. 30CrMnSiA steel is mostly used to manufacture various important parts with high load and high speed.

The Performance requirements of low alloy structural steel, RINA grade B corrugated bulkhead steel:(1) High strength: generally, the yield strength is above 300Mpa.(2) High toughness: the elongation is required to be 15% - 20%, and the room temperature impact toughness is greater than 600kJ/m ~ 800kJ/m. For large welded components, higher fracture toughness is required.(3) Good weldability and cold forming property.(4) Low cold brittle transition temperature. (5) Good corrosion resistance.

Quenching is a common heat treatment process. It is the metal heat treatment process in which the RINA grade B corrugated bulkhead steel metal workpiece is heated to a proper temperature and kept for a period of time, then immersed in the quenching medium for rapid cooling. Quenching can improve the strength and hardness of steel in a large range, and adjust the coordination between RINA grade B corrugated bulkhead steel strength and hardness, plasticity and toughness. Quenching is generally used as the final heat treatment.

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