According to the different alloying elements, stainless steel can be roughly divided into two categories. One is chromium stainless steel, which is suitable for working in oxidizing media such as atmosphere, steam and seawater. Because only one chromium element is added, the cost is low. This is a ferromagnetic material that can be attracted by a magnet. Commonly known as “MGSS stainless iron” actually refers to this chromium stainless steel, which is martensitic stainless steel in terms of metal structure.
The other is chromium nickel stainless steel, because the chromium and nickel contents of this kind of stainless steel are about 18% and 8% respectively. It is called 18-8 stainless steel, also known as 304 stainless steel. It is a very common stainless steel. Chromium nickel stainless steel has higher plasticity and toughness, can carry out deep stamping deformation, has better corrosion resistance and higher cost than chromium stainless steel, and is suitable for working in various corrosive media. It is non ferromagnetic and suitable for manufacturing non-magnetic instrument parts. Commonly known as “HGSs stainless steel” actually refers to this chromium nickel stainless steel, which is austenitic stainless steel in terms of metal structure.
