Compared with carbon steel
The density of carbon steel is slightly higher than that of ferritic and martensitic stainless steel, and slightly lower than that of austenitic stainless steel;
The resistivity is in increasing order of carbon steel, ferritic, martensitic and austenitic stainless steel;
3. The order of linear expansion coefficient is similar, austenitic stainless steel is the highest and carbon steel is the smallest;
4. Carbon steel, ferritic and martensitic stainless steels are magnetic, austenitic stainless steels are non-magnetic, but they will produce magnetism when they are cold-worked and hardened to form martensite transformation. Heat treatment can be used to eliminate this martensite. The tissue is restored to its non-magnetic properties.
Compared with carbon steel, austenitic stainless steel has the following characteristics:
①High resistivity, about 5 times that of carbon steel.
②Large linear expansion coefficient, 40% larger than carbon steel, and as the temperature rises, the value of the linear expansion coefficient increases accordingly.
③Low thermal conductivity, about 1/3 of carbon steel.
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