Flat steel can be divided into hot-rolled flat steel and forged flat steel according to the forging process.
Hot-rolled flat steel is a general-purpose rolled steel with a rectangular cross section. Its specifications are expressed in millimeters of thickness * width. Flat steel can be finished steel for components, staircases, bridges, and fences. Flat steel can also be used as welded steel and blanks and slabs of laminated sheets. (Material: Q215, Q235), executive standard: GB704-1988 instead of GB704-83. This standard applies to general-purpose hot-rolled flat steel with a thickness of 3 ~ 60mm, a width of 10 ~ 200mm, and a rectangular cross section. Delivery status: Flat steel is delivered in straight bars. Measuring method: Flat steel of fixed length and door length is delivered according to the theoretical weight.
Forged flat steel is a long rectangular steel plate with a rectangular cross section. Forging unfairness can obtain forgings of a certain shape and size, and at the same time can significantly improve the as-cast structure of steel and increase the density of steel; it can change the distribution of fiber structure, remove anisotropy, improve the mechanical properties of metal, and make the strength and Toughness has been improved; and high-grade steels and high-alloy steels with lower plasticity can be processed. Forged flat steel is mainly high-quality alloy steel, which is mainly used as springs, tools and important mechanical parts. The specifications of forged flat steel are expressed in millimeters of thickness * width, and the specifications are 20mm * 40mm ~ 160mm * 300mm.
