Is stainless steel magnetic?

Carbon steel, ferritic and martensitic stainless steel are magnetic.

Stainless steel is often divided into martensitic steel, ferritic steel, austenitic steel, austenitic-ferritic (duplex) stainless steel and accumulation hardened stainless steel according to the arrangement status. In addition, it can be divided into chromium stainless steel, chromium nickel stainless steel and chromium manganese nitrogen stainless steel by composition. There is also special stainless steel for pressure vessels.

Carbon steel, ferritic and martensitic stainless steels are magnetic, austenitic stainless steels are non-magnetic, but they will become magnetic when they are cold-worked and hardened to form martensite transformation. Heat treatment can be used to eliminate this martensite arrangement. It is non-magnetic.

Ferritic stainless steel contains 15% to 30% chromium. Its corrosion resistance, resistance and weldability advance with the addition of chromium content, and its chloride stress corrosion resistance is better than other varieties of stainless steel. Due to its high chromium content, ferritic stainless steel has better corrosion resistance and oxidation resistance, but its mechanical and process functions are poor. It is mostly used for acid-resistant structures with little stress and as anti-oxidation steel.

This kind of steel can resist the corrosion of the atmosphere, nitric acid and salt solution, and has the characteristics of good high temperature oxidation resistance and low thermal expansion coefficient. It is used in nitric acid and food factory equipment, and can also be used to manufacture parts that operate at high temperatures, such as gas turbine parts, etc. .