201 stainless steel, with a certain acid and alkali resistance, high density, polishing no bubbles, no pinhole, is the production of various watchcase, watchband bottom cover quality materials.
The American iron and steel institute uses three - digit Numbers to mark all standard grades of malleable stainless steel. Among them:
(1) Austenitic type stainless steel with 200 and 300 series of Numbers mark, for example, 201, 304, 316 and 310,
(2) Ferrite and martensitic stainless steels are represented by series 400 Numbers.
(3) Ferritic stainless steel is marked with 430 and 446, martensitic stainless steel is marked with 410, 420 and 440C,
(4) Double phase (austenitic ferrite) stainless steel, precipitation hardening stainless steel and iron content less than 50% of the high alloy is usually used in the patent name or trademark name.