Steel coils can be divided into hot-rolled steel coils, cold-rolled steel coils, galvanized steel coils, galvalume steel coils, color-coated coils, stainless steel sheet in coil, etc. according to their materials and production methods.
Hot-rolled steel coil, that is, hot-rolled coil, also called hot coil, is made of slab (mainly continuous casting slab) as raw material, and is made into strip steel by rough rolling unit and finishing rolling unit after heating. The hot steel strip coming out of the last rolling mill of finishing rolling is cooled to the set temperature by laminar flow, and rolled into steel strip coil by the coiler, and the cooled steel strip is coiled.
Hot rolled steel plate products include steel strip (coil) and steel plate cut from it. The steel strip (roll) can be divided into straight roll and finishing roll (sub-roll, flat roll and slitting roll).
Hot rolling can be divided into ordinary carbon structural steel, low alloy steel and alloy steel according to its material and performance.
According to different uses, it can be divided into: steel for cold forming, structural steel, automotive structural steel, corrosion-resistant structural steel, mechanical structural steel, steel for welding gas cylinders and pressure vessels, steel for pipelines, etc.
The main materials of hot rolled coils are: Q195, Q215, Q235A, Q235B, Q345B, 510L, Q345A, Q345E, SS400, SPHC, SS330, SS490, SPHD, SAE1006, etc.
Cold-rolled steel coils are made of hot-rolled coils as raw materials and rolled at room temperature below the recrystallization temperature, including cold-rolled steel sheets and cold-rolled coils. Among them, those delivered in sheets are called steel plates, also called box plates or flat plates; those delivered in rolls are called steel strips, also called coil plates.
Cold-rolled steel coil specifications: thickness 0.2-4mm, width 600-2 000mm.
Grade: Q195A-Q235A, Q195AF-Q235AF, Q295A(B)-Q345 A(B); SPCC, SPCD, SPCE, ST12-15, DC01, DC02, DC03, DC04, DC05, DC06, etc.
Performance: Low carbon steel grades are mainly used, which require good cold bending and welding performance, as well as certain stamping performance.
Galvanized steel coil is produced by continuous hot-dip galvanizing process with hot-rolled steel strip or cold-rolled steel strip as the substrate. The hot-dip galvanized coil supplied in the form of coils is supplied as a rectangular flat plate by cross-cutting.
Galvanized coils can therefore be divided into hot-rolled galvanized coils and cold-rolled hot-dip galvanized coils, which are mainly used in construction, home appliances, automobiles, containers, transportation and household industries.
Galvanized steel coils can be divided into hot-dip galvanized steel coils and spot galvanized steel coils according to the galvanizing process.
Material: A653, CGCC, SGCC, CGCD, ST01, TDC51DZM, TDC52D, TDC53D, TS280GD, TS300GD, TS350GD, TS550GD, DX51D+Z, TSGCC, JIS G3312-CGCC, CGC340-570, (G550), ASTM A755M CS -B , SS255-SS550, etc.
Galvalume steel coil refers to 55% aluminum-zinc alloy coated steel coil, and the coating composition is composed of 55% aluminum, 43.4% zinc and 1.6% silicon by weight. It can be divided into ordinary passivated galvalume steel coil and anti-fingerprint AL-Zn steel coil.
Galvalume-coated steel coils can be used for manufacturing in the home appliance industry. It can be used as the casing, door panel, etc. of home appliances such as refrigerators, air conditioners, and washing machines.
Material: ASTM A792M CS type B, type C, SGLCC, SGLCD, DC51D+AZ, DC52D+AZ, S250GD+AZ, S300GD+AZ, S350GD+AZ, S550GD+AZ, DX51D+AZ, DX52D+AZ, etc.
Color-coated coil is based on hot-dip galvanized sheet, hot-dip galvalume sheet, electro-galvanized steel sheet, etc. After surface pretreatment (chemical degreasing and chemical conversion treatment), one or several layers of organic coatings are applied on the surface, and then A product that is baked and cured. It is named after the colored steel coils coated with various colors of organic coatings, referred to as color-coated coils.
Color-coated rolls are light, beautiful and have good anti-corrosion properties, and can be processed directly. The colors are generally divided into off-white, sea blue, and brick red. They are mainly used in advertising, construction, household appliances, electrical appliances, furniture, and transportation. Industry.
Material: TDC51D+Z, TDC52D+Z, TDC53D+Z, TDC54D+Z, TS280GD+Z, TS350GD+Z, TS550GD+Z, TDC51D+AZ, TDC52D+AZ, TDC53D+AZ, TDC54D+AZ, TS280GD+AZ, TS350GD+AZ, TS550GD+AZ, etc.
Stainless steel coils are divided into austenitic, ferritic, martensitic, duplex stainless steel cold-rolled coils and stainless steel hot-rolled coils.
Surface treatment: NO.1, 2B, 2D, 3#, 4#, HL, BA, 2BA, etc.
Stainless steel coils are widely used in chemical industry, food, medicine, papermaking, petroleum, atomic energy and other industries, as well as various parts of construction, kitchen utensils, tableware, vehicles and household appliances.
Material:
1. Mainly: 201, 202, 304, 304L, 304H, 316, 316L, 316Ti, 2205, 330, 630, 660, 409L, 321, 310S, 410, 416, 410S, 430, 347H, 2Cr13, 3Cr 13
etc.
2. 300series:301, 302, 303, 304, 304L, 309, 309s, 310, 310S, 316, 316L, 316Ti, 317L, 321, 347
3. 200series: 201, 202, 202cu, 204
4. 400series: 409, 409L, 410, 420, 430, 431, 439, 440, 441, 444
5. Others:2205, 2507, 2906, 330, 660, 630, 631, 17-4ph, 17-7ph, S318039 904L, etc
6. Duplexstainless steel: S22053, S25073, S22253, S31803, S32205, S32304
7. Special Stainless Steel: 904L, 347/347H, 317/317L, 316Ti, 254Mo