Hardware refers to the five metal materials of gold, silver, copper, iron, and tin, and is the mother of industry; The foundation of national defense and the products of hardware materials are usually only divided into two categories: large hardware and small hardware. Big hardware refers to steel p
Stainless steel is usually divided into various models such as 201, 202, 301, 304, 309s, 310s, 410, 420, 431, etc. Among them, 201, 202, 301, 304, 309s, and 310s belong to austenitic stainless steel, which does not contain magnetism and can withstand corrosion in various media. 410, 420 and 431 belo