The material selection of the metal filing cabinet directly determines the stability of the quality and the aesthetic appearance of the metal filing cabinet. The material selection of sheet metal filing cabinet first depends on the thickness of sheet metal. According to the thickness of the plate, the market is generally divided into thick file cabinets and thin file cabinets. At present, the common steel plate thickness of thin file cabinets in the market is generally 0.3-0.5MM, and that of thick file cabinets is generally 0.6-0.8 mm In addition, the thickness of finished products sprayed on the surface will increase by 0.1mm-0.2 mm. Due to the thin material selection, the load-bearing and durability of products cannot be guaranteed. This is a product with excessive low-price competition in the market, and it is constantly reducing prices and materials. Strictly speaking, it can't meet the actual demand of users for iron filing cabinets. Therefore, before spraying, only the iron filing cabinet with bare plate thickness above 0.6mm is the basis to ensure the filing cabinet to be used all the year round.