Steel plates are divided by thickness, and thin steel plates
The width of the plate is 500 ~1500mm; The thickness and width are 600 ~ 3000mm. Plates are divided into ordinary steel, high-quality steel, alloy steel, spring steel, stainless steel, tool steel, heat-resistant steel, bearing steel, silicon steel and industrial pure iron plates. According to professional purposes, there are oil drum board, enamel board, bulletproof board and so on. According to the surface coating, there are galvanized sheet, tinned sheet, lead-plated sheet and plastic composite steel sheet.
Extended data:
Steel plate is a flat steel which is cast, cooled and pressed by molten steel. It is a flat rectangle and can be directly rolled or cut from a wide steel strip.
Steel plates are divided by thickness, and thin steel plates
Steel plates are divided into hot rolling and cold rolling according to rolling.
The width of the plate is 500 ~1500mm; The thickness and width are 600 ~ 3000mm. Plates are divided into ordinary steel, high-quality steel, alloy steel, spring steel, stainless steel, tool steel, heat-resistant steel, bearing steel, silicon steel and industrial pure iron plates. According to professional purposes, there are oil drum board, enamel board, bulletproof board and so on. According to the surface coating, there are galvanized sheet, tinned sheet, lead-plated sheet and plastic composite steel sheet.
Identification method
The American Iron and Steel Association uses three numbers to represent various standard grades of malleable stainless steel. These include:
① Austenitic stainless steel is marked with serial numbers of 200 and 300. For example, some common austenitic stainless steels are marked with numbers of 20 1, 304, 3 16 and 3 10.
② Ferritic and martensitic stainless steels are represented by 400 series numbers.
③ Ferritic stainless steels are labeled 430 and 446, and martensitic stainless steels are labeled 4 10, 420 and 440C, which are dual-phase (austenite-ferrite).
④ Stainless steel, precipitation hardening stainless steel and high alloy with iron content less than 50% are usually named by patent names or trademarks.
Molten steel is not a pure metal, but a multicomponent alloy based on Fe and containing a certain amount of elements such as C, Si and Mn. Therefore, its crystallization process is not carried out at a fixed temperature (melting point), but within a certain temperature range. Under the condition of equilibrium crystallization, when the temperature of molten steel drops to its liquidus temperature (tL), crystallization begins to appear, but when it reaches its solidus temperature (ts), crystallization ends.
The temperature range between liquidus and solidus is TL-TS = δ TC. It is called the crystallization temperature range of the alloy. The crystallization temperature range of a steel mainly depends on the nature and content of the elements contained, which can be determined by the binary or ternary phase diagram of iron and the corresponding elements. The influence of each element on the crystallization temperature range can be approximately regarded as addition. Therefore, the crystallization temperature range of a specific steel grade.
References:
Baidu encyclopedia-steel plate