SUS420F is a kind of stainless steel, also known as 420F stainless steel, which is a kind of martensitic stainless steel. It is a steel alloyed by elements such as chromium and molybdenum, which has high hardness and strength, and also has certain corrosion resistance.

SUS420F stainless steel is mainly used in the manufacture of knives, instruments, valves, bearings, pumps and pneumatic components. It has good processing performance, easy to cut and shape, and can be processed into various shapes. In addition, SUS420F stainless steel also has high magnetic permeability, which can be applied to the manufacture of electronic equipment and motors.

It should be noted that the welding performance of SUS420F stainless steel is poor, and appropriate welding processes and measures should be taken. In addition, it is not suitable for use in high temperature or strong corrosive environment.