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Hot rolled steel coils and Cold rolled steel coils
-Hot rolled, it uses slab (mainly continuous casting billet) as raw material, and after heating, it is made into strip steel by rough rolling mill and finishing mill. The hot steel strip from the last rolling mill of finishing rolling is cooled to a set temperature by laminar flow, and then coiled into a steel coil by the coiler. The cooled steel 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
-Cold rolled, commonly used in the steel industry, is different from hot rolled coils. 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 generate more internal stress, and are often annealed after cold rolling.
Category: SPCC SPCD SPCE
Steel coils production process
The production process of hot-dip galvanized sheet mainly includes: original plate preparation → pre-plating treatment → hot-dip plating → post-plating treatment → finished product inspection, etc.