1. Chemical properties: Chemical resistance and electrochemical corrosion resistance are the best among steel materials, 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 corrosion-resistant parts that require high strength and high wear resistance, such as turbine shafts, Stainless steel tools, stainless steel bearings, etc., austenitic stainless steel has good plasticity, not too high in strength, but the best corrosion resistance among stainless steels. It is suitable for occasions that require very corrosion resistance but do not require high mechanical properties, such as chemical plants and fertilizers. Of course, it can also be used in submarine and other military industries. Ferritic stainless steel has moderate mechanical properties and low strength, but 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. It is suitable for pressure processing. Martensitic stainless steel has poor process performance due to its high hardness.