Compared with the physical performance data of stainless steel and carbon steel, the density of carbon steel is slightly higher than that of ferritic and martensitic stainless steels, and slightly lower than that of austenitic stainless steels; the resistivity is based on carbon steel, ferrite type, and martensitic type. Ordering increase with austenitic stainless steel; order of linear expansion coefficient is also similar, austenitic stainless steel is highest and carbon steel is minimal; carbon steel, ferritic and martensitic stainless steel are magnetic, austenitic stainless steel is nonmagnetic However, when the cold work hardening produces a phase transformation of the magnetite, it will produce magnetism, and the heat treatment method can be used to eliminate this martensite structure and restore its non-magnetic properties. Compared with carbon steel, austenitic stainless steel has the following characteristics:
1) High cathode rate, about 5 times that of carbon steel.
2) Large linear expansion coefficient, 40% larger than carbon steel, and as the temperature rises, the value of stainless steel screw expansion coefficient increases accordingly.
3) Low thermal conductivity, about 1/3 of carbon steel.