Classification of steel coils

 　　Hot rolled, also known as hot-rolled sheet steel, is made from sheet metal (mainly continuous casting) as raw material and heated to produce strip steel by the roughing and finishing mills.

　　The hot steel strip from the last finishing mill is cooled to the set temperature through laminar flow, and then rolled into steel strip coils by the coiling machine. The cooled steel strip coils are processed into steel plates, flat coils, and longitudinally cut steel strip products through different finishing operation lines (leveling, straightening, transverse or longitudinal cutting, inspection, weighing, packaging, and marking, etc.) according to the different needs of users

　　Material: Q235B, Q345B, SPHC, 510L, Q345A, Q345E

　　Cold rolled coil, commonly used in the steel industry, is different from hot-rolled coil. It refers to a steel strip that is directly rolled into a certain thickness using a rolling roller at room temperature and rolled into a whole coil using a winding machine. Compared to hot-rolled coils, cold-rolled coils have a bright surface and high smoothness, but they generate more internal stress and are often annealed after cold rolling.

　　Classification: SPCC SPCD SPCE

　　Galvanized steel coils refer to the surface treatment technique of plating a layer of zinc on the surface of metals, alloys, or other materials for aesthetic and rust prevention purposes. The main method used now is hot-dip galvanizing.

　　The production process of hot-dip galvanized sheet mainly includes: raw plate preparation, pre plating treatment, hot dip plating, post plating treatment, and finished product inspection. According to customs, the pre plating treatment method is often used.

　　Galvalume steel coils are aluminum zinc alloy structures composed of 55% aluminum, 43% zinc, and 2% silicon solidified at a high temperature of 600 ° C. The entire structure is composed of aluminum iron silicon zinc, forming a dense quaternary crystal alloy.

　　Aluminum zinc coated steel plate has many excellent characteristics: strong corrosion resistance, which is three times that of pure galvanized plate; The surface has beautiful zinc flakes that can be used as building exterior panels. Its characteristics include: corrosion resistance (the corrosion resistance of "aluminum zinc coated steel coils" is mainly due to the protective function of aluminum. When zinc is worn, aluminum forms a dense layer of aluminum oxide, preventing further corrosion of the interior by corrosion-resistant substances.) Heat resistance (aluminum zinc alloy steel plate has good heat resistance and can withstand high temperatures of over 300 degrees Celsius, similar to the high-temperature oxidation resistance of aluminum plated steel plate) Heat reflection (aluminum plated zinc steel plate has a high heat reflection rate, which is twice that of galvanized steel plate, and people often use it as insulation material) Economy (Because the density of 55% AL Zn is smaller than that of Zn, the area of aluminum zinc plated steel plate is more than 3% larger than that of plated steel plate under the same weight and thickness of the gold plating layer.)

　　The post-treatment of aluminum zinc plating plate includes: DRY drying; Oil coating; Chromate acid passivation; AFP/Galva fingerprint resistance; Non Gr, Gr free has no fingerprint resistance. clean

　　Color coils, also known as colored steel coils, are coated with various organic coatings of different colors, hence their name

　　The color coated steel strip using hot-dip galvanized steel strip as the substrate is not only protected by a zinc layer, but also covered and protected by organic coatings on the zinc layer, preventing rust on the steel strip. The service life is about 1.5 times longer than that of galvanized strip.

　　Color coated rolls are lightweight, aesthetically pleasing, and have excellent corrosion resistance. They can also be directly processed and are mainly used in the construction industry, home appliance industry, electrical appliance industry, furniture industry, and transportation industry.

　　The coating used for the color coating roll should be selected according to the different usage environments, such as modified poly (ethylene glycol), poly (vinylidene chloride) plastic sol, poly (vinylidene chloride), etc. Users can choose according to their usage.



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