1. Chemical properties: The chemical corrosion resistance and electrochemical corrosion resistance are the best in steel, second only to titanium alloys.

2. Physical properties: heat resistance, high temperature resistance, low temperature resistance and even ultra-low temperature resistance.

3. Mechanical properties: According to different types of stainless steel, the mechanical properties are different. Martensitic stainless steel has high strength and hardness, and is suitable for manufacturing parts that are not only corrosion resistant but also require high strength and high wear resistance, such as turbine shafts, Stainless steel knives, stainless steel bearings, etc. Austenitic stainless steel has good plasticity and low strength, but the corrosion resistance is the best among stainless steels. It is suitable for occasions where very corrosion resistance is required but mechanical properties are not high, such as chemical plants, chemical fertilizers Equipment materials of factories, sulfuric acid and hydrochloric acid manufacturers, etc., of course, can also be used in military industries such as submarines. Ferritic stainless steel has moderate mechanical properties and low strength. However, it is resistant to oxidation and is suitable for various industrial furnace parts.

4. Process performance: Austenitic stainless steel has the best process performance. Due to its good plasticity, it can be processed into various plates, tubes and other profiles, which are suitable for pressure processing. Martensitic stainless steel has poor process performance due to its high hardness.