There are various designations for this stainless steel:
AISI Nomenclature: 201European
EN Standard: 1.4372
This is a chromium-nickel steel. Depending on the composition with a proportion of 16% - 18% chromium and a proportion of 3.5% - 5.5% nickel. In addition, a proportion of 5.5% - 7.5% manganese is added for strengthening. Stainless steel 201 can be rolled thinner due to the lack of nickel content, but has much lower corrosion resistance and only limited acid resistance.