Classification and application of hot rolled coil
Hot rolled coil sheet is a strip made from slab (mainly continuous casting slab), heated by reheating furnace (or soaking furnace) and rolled by roughing mill and finishing mill. Hot-rolled strips from the last finishing mill are cooled through laminar flow to a set temperature and coiled into hot-rolled strips by a coiler. Hot rolled coils include steel strips (rolls) and sheared steel plates. Steel strip (roll) can be divided into straight hair coil and finishing roll (dividing, leveling and slitting).
Hot rolled coil generally includes medium thickness and wide steel strip, hot rolled thin strip and hot rolled sheet. Medium-thick and wide steel strips are the most representative varieties, and their output accounts for about two-thirds of the total production of hot-rolled coil. The subject matter of hot-rolled coil futures contracts to be listed on the Shanghai Futures Exchange is medium-thick and wide steel strips.

Medium-thick and wide steel strip is a kind of steel strip with thickness of 3 mm and width of less than 20 mm and width of 600 mm. It is produced and delivered in coil form by continuous hot strip mill or Steckel mill.
Hot-rolled thin and wide steel strip is a kind of steel strip with thickness of 600mm, which is produced and delivered in coil form by continuous hot rolling mill or Steckel mill or thin slab continuous rolling equipment.
Hot-rolled sheet refers to the strip produced by thickness mill, thin slab continuous casting and rolling equipment and delivered in shape.
Hot rolled coil sheets can be divided into ordinary carbon structural steel, low alloy steel and alloy steel according to their materials and properties. It can be divided into cold forming steel, structural steel, automobile structural steel, corrosion resistant structural steel, mechanical structural steel, welding cylinder and pressure vessel steel, pipeline steel and so on. Hot rolled sheet products have high strength, good toughness, easy processing and forming and good weldability, and are widely used in cold-rolled substrates, ships, automobiles, bridges, construction, machinery, oil pipelines, pressure vessels and other manufacturing industries.
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