201 stainless steel sheet is a low-nickel stainless steel sheet. Moreover, it is a high-strength hardened austenitic stainless steel.Meanwhile, its chromium content is 16%-18%, and its nickel content is 3.5%-5.5%.Because the price of nickel is relatively high, to save a nickel, people made 201 stainless steel sheets.Therefore, it is characterized by low nickel content.Moreover, one cannot harden it by heat treatment.However, people can cold work it into a sheet with high tensile strength.Moreover, in some cases, it can replace other alloys with higher nickel content.

430 stainless steel sheet is a non-stabilized ferritic stainless steel. It has a higher percentage of chromium content which makes for a highly corrosion resistant, heat tolerant, stainless steel with oxidation resistance and good mechanical properties.