Common stainless steel materials:

SUS201: poor corrosion resistance, widely used as a cheap substitute for 300 series.

SUS301: good ductility, used for molding products. It can also be hardened rapidly by machining; Good weldability.

SUS303: it is easier to cut than 304 by adding a small amount of sulfur and phosphorus.

SUS304: universal type, non-magnetic, stainless steel whose metallographic structure cannot be changed by heat treatment.Products such as corrosion-resistant containers, tableware, furniture, railings and medical equipment.

SUS309: good heat resistance and oxidation resistance, such as heat exchanger, boiler components and jet engine.

SUS310: excellent high temperature oxidation resistance, with the maximum service temperature of 1200 ℃.

SUS316: the second type of widely used steel, which is mainly used in food industry, watch accessories, pharmaceutical industry and surgical equipment. Adding molybdenum makes it obtain a special corrosion-resistant structure. It has better chloride corrosion resistance, so it is also used as "marine steel".

SUS316 L: low carbon, so it is more corrosion-resistant and easy to heat treatment. Products such as chemical processing equipment, nuclear power generator and refrigerant storage tank.

SUS420: "cutting tool grade" martensitic steel, similar to the earliest stainless steel such as Brinell high chromium steel. It is also used for surgical tools, which can be made very bright.

SUS430: ferritic stainless steel for decoration, such as automotive accessories. Good formability, but poor temperature resistance and corrosion resistance.

SUS440: high strength cutting tool steel, with slightly higher carbon content, can obtain higher yield strength after appropriate heat treatment, and the hardness can reach 58hrc. It is one of the hardest stainless steels. The most common application example is the razor blade.