300 Series austenitic stainless steel is based on chromium-nickel austenitic stainless steel, to add manganese and (or) nitrogen to the steel instead of the precious metal nickel and developed, its austenitic elements, in addition to manganese and nitrogen, there is generally a moderate amount of nickel (4% to 6%), so this series of stainless steel, suitable for bearing heavy loads and corrosion resistance requirements are not too high equipment and components used. 200 series stainless steel The biggest advantage of the 200 series stainless steel is that it is cheaper than the 300 series stainless steel, and has a very common use in construction and decoration, kitchenware, sanitary equipment and appliances, household appliances, transportation and industrial parts of equipment and components.