Hot Rolled Steel Coil
Hot rolled coil, is made of slabs (mainly connected).
Cast slab) as raw material, after heating, the strip is made from roughing mill and finishing mill. The hot strip from the last finishing mill is cooled to set temperature by laminar flow. The coiler coils into strip coils. After cooling, the strip coils are processed by different finishing lines (leveling, straightening, cross cutting or longitudinal cutting, inspection, weighing, packaging and marking) according to the different needs of users and become steel plate, flat coil and longitudinal cutting strip products. Material: Q235B,Q345B, SPHC, 510L, Q345A, Q345E.
Cold rolled coil is often used in steel industry, which is different from hot rolled coil. It refers to the strip that is rolled directly into a certain thickness at room temperature and coiled into a whole coil by a coiler. Compared with hot rolled coil, cold rolled coil has bright surface and high finish, but it produces more internal stress. It is often annealed after cold rolling. It can be divide to SPCC, SPCD, SPCE.
Galvanized steel coils, zinc plating refers to the surface treatment technology of plating a layer of zinc on the surface of metals, alloys or other materials to make them beautiful and rust-proof. Hot-dip galvanizing is the main method now used.