The difference between cold rolled steel sheet and hot rolled steel plate. The carbon content of A588 Gr K structural steel plate, hot rolled steel plate is slightly higher than that of cold rolled steel sheet. In the case of little difference in composition, the density of cold rolled steel sheet and hot rolled steel plate is the same. Hot rolled steel plate has characteristics of low hardness, easy processing and good ductility. Cold rolled steel sheet has high hardness, and it is relatively difficult for processing. But it is not easy to deform and has high strength. Hot rolled steel plate can be made into alloy steel plate by adding other elements, and its properties are also excellent compared with other high-quality steel plates.
Consumption of A588 Gr K structural steel plate, finished steel products in Latin America in 2019 was 64.2 million tons, down by 5% compared to 67.6 million tons in 2018. The decline in steel consumption in the region reflects the contraction of Latin American economies, particularly the three major economies: Mexico, Argentina and Brazil. These three countries together accounted for 87% of the reduced steel consumption in Latin America. However, our steel materials export volume to those countries did not decrease but show a increasing tendency last year.
Design of smelting composition and smelting process of SN400A, SN400B, SN400C steel, A588 Gr K structural steel plate product: The smelting process adopts low-sulfur molten iron and low-sulfur scrap on the basis of the general process flow of steel for export, adding the refining process of LIIF furnace deep desulfurization and SiCa treatment. In this way, the sulfur content in the steel can be reduced, and the sulfide in the steel can be modified. Greatly improve the toughness of steel and improve the casting performance of molten steel, and increase the qualification rate of the tundish temperature to ensure smooth casting.
