Stainless steel science | talk about 400 series stainless steel
400 series stainless steel is an alloy of iron, carbon and chromium. Because it does not contain nickel, it is a nickel-free stainless steel, also known as stainless iron. 400 series stainless steel contains martensitic structure and iron, not only has normal magnetic properties, but also has a strong high-temperature oxidation resistance, compared with carbon steel, its physical and mechanical properties have been further improved. And most 400 series stainless steels can be heat treated.