Physical properties of stainless steel products

 

Compared with carbon steel

1. Density
The density of carbon steel is slightly higher than that of ferrite and martensitic stainless steel, but slightly lower than that of austenitic stainless steel;

2. Resistivity
The resistivity increases in the order of carbon steel, ferrite, martensitic and austenitic stainless steel;

3. The order of linear expansion coefficient is similar, with austenitic stainless steel being the highest and carbon steel being the smallest;

4. Carbon steel, ferrite and martensitic stainless steel are magnetic, while austenitic stainless steel is non-magnetic. However, magnetism will be generated when it undergoes cold working and hardening to form a martensitic phase transformation. Heat treatment can be used to eliminate this martensitic structure and restore its non-magnetic nature.

Compared with carbon steel, austenitic stainless steel has the following characteristics:

1) High resistivity, about 5 times that of carbon steel.

2) Large linear expansion coefficient, 40% larger than that of carbon steel, and the value of the linear expansion coefficient increases accordingly as the temperature rises.

3) Low thermal conductivity, about 1/3 of that of carbon steel.