SS400 low carbon steel Q235 hot rolled coil

♦ Specifications

♦ Difference 

Both hot rolling and cold rolling are the process of forming section steel or steel plate. They have a great influence on the structure and properties of steel. The rolling of steel is mainly hot rolling, and cold rolling is only used to produce small section steel and sheet. Cold rolling is processed and rolled on the basis of hot rolled coils. Generally speaking, it is a processing process of hot rolling—pickling—cold rolling. Cold rolling: using hot-rolled steel coil as raw material, after pickling to remove oxide scale, cold rolling is carried out, and the finished product is hard-rolled coil. The plastic index decreases, so the stamping performance will deteriorate, and it can only be used for parts with simple deformation. Hard rolled coils can be used as raw materials for hot-dip galvanizing plants,

♦ The main classification of hot rolled coil

Hot rolled coils generally include medium and thick wide steel strips, hot rolled thin wide steel strips and hot rolled sheets. Medium-thick and wide steel strip is the most representative variety, and its output accounts for about two-thirds of the total output of hot-rolled coil. The subject matter of the hot-rolled coil futures contract to be listed on the Shanghai Futures Exchange belongs to China. Thick and wide steel strip.

Medium-thick and wide steel strips refer to steel strips with a thickness of ≥3 mm and less than 20 mm and a width of ≥600 mm, which are produced by continuous wide-band hot rolling mills or furnace rolling mills and delivered in coils.

Hot-rolled thin and wide steel strip refers to the steel strip with thickness < 3 mm and width ≥ 600 mm, which is produced by continuous wide-band hot rolling mill or furnace coil rolling mill or thin slab continuous rolling and delivered in coil form.

Hot-rolled sheet refers to a single sheet of steel with a thickness of <3 mm. Hot-rolled sheet is usually produced by equipment such as continuous wide-band steel rolling mill, continuous casting and rolling of thin slab, and delivered in sheet form.

♦ Application

Hot-rolled coil is an important type of steel, which mainly reflects the needs of industrialization. It has excellent properties such as high strength, good toughness, easy processing and good weldability, and is widely used in ships, automobiles, bridges, construction, machinery, pressure vessels and other manufacturing industries.