1. What is hot rolled coil?
As shown in the picture, this is a hot rolled steel coil with a black metallic finish. We can carry out different finishing according to customers' requirements.
Hot rolled refers to hot rolled coils, which use slabs (mainly continuous casting billets) as raw materials, and after heating, they are made into strip steel by the rough rolling mill and the finishing mill. The hot steel strip from the last rolling mill of the finishing rolling is cooled to a set temperature by laminar flow, and is wound into a steel strip coil. The cooled steel strip coil undergoes different finishing operations according to the different needs of users. Lines (flattening, straightening, cross-cutting or slitting, inspection, weighing, packaging and marking, etc.) are processed into steel plates, flat coils and slit steel strip products.
Material: Q235B Q345B SPHC, 510L, Q345A, Q345E.
2.What is cold rolled coil?
As is shown in the pricture, this is a cold rolled steel coil wiht smooth and clean surface.
Cold rolled coil (Cold rolled) is often used in the steel industry, which is different from hot rolled coil. It refers to a steel strip that is directly rolled into a certain thickness with a roll at room temperature and wound into a whole coil with a winder. Compared with hot-rolled coils, cold-rolled coils have a brighter surface and higher finish, but they will produce more internal stress, and are often annealed after cold rolling.
Material: SPCC, SPCD, SPCE.
Cold rolled steel coil, smooth surface, good processing, used for automobiles, refrigerators, washing machines and other household appliances, as well as industrial equipment, various building materials. With the development of economy, cold rolled steel coil has been called as a necessary material in modern society.
Classification of cold rolling products: hot rolling pickling, hard rolling, ordinary cold rolling, galvanized (electric galvanized, fingerprint resistant, hot galvanized), aluminum zinc plating, tin plating, color coating, electrical steel (silicon steel sheet) and so on.
3.What is galvanized steel coil？And what are its advantages?
Galvanized coil is a thin steel sheet with a layer of zinc adhered to the surface by immersing a thin steel sheet with Q235 as the base material in a molten zinc tank. It is mainly produced by continuous galvanizing process, that is, the coiled steel plate is continuously immersed in a galvanizing tank with molten zinc to make a galvanized steel plate; the coil is harvested into a steel coil.
The production process of hot-dip galvanized coils mainly includes: preparation of the original plate, pre-plating treatment → hot-dip plating → post-plating treatment-finished product inspection, etc.
The surface of galvanized steel coils is unique smooth, flat and gorgeous star flower, the base color is silver white. Special coating structure makes it has excellent corrosion resistance, has good processing performance, can be stamping, cutting, welding and so on.
4. HDT company - Professional China Manufacturer of Cold Hot Rolled Galvanized Steel Coils.
HDT steel is a professional steel coil manufacturer and supplier. We have sufficient inventory, the company has prepared all kinds of steel coils all the year round, with perfect service system, on time delivery, to ensure the construction period of customers. We have mature industry experience, can according to the different needs of customers, customized size.
Although each steel coil manufacturer has different advantages, we can have a large inventory to meet the needs of most customers. In most cases, we are your best choice.