SA516 grade 55, SA516 grade 60, SA516 grade 65, SA516 grade 70. These four grades CCS FH40 hull frame steel are mainly defined by different tensile and yield strength ranges, which are affected by carbon content.
Our company's CCS FH40 hull frame steel power boilers, heating furnaces of double bars, double high lines and medium and thick plates all adopt heat storage technology, which can fully use blast furnace gas; the ladle baking, Maerz active lime kiln and medium and thick plate heat treatment furnace all burn converter gas, which can improve the CCS FH40 hull frame steel utilization rate of secondary energy and realize negative energy steelmaking in steelmaking process.
Weathering steel generally adopts the process route of fine material into the furnace-smelting (converter, electric furnace-microalloying treatment-argon blowing-LF refining-low superheat continuous casting (feeding rare earth wire)-controlled rolling and cooling. The scrap steel is added into the furnace together with the charge, and smelted according to the conventional process. After the CCS FH40 hull frame steel steel is tapped, deoxidizers and alloys are added. After the molten steel is treated with argon blowing, the molten steel is cast. By adding rare earth elements to the steel, the CCS FH40 hull frame steel weathering steel is purified and the content of inclusions is greatly reduced.
At the initial stage of corrosion, the rust layer on the surface of weathering steel is denser than that of carbon steel, CCS FH40 hull frame steel, and there are relatively few cracks and holes. After 25 days, delamination occurs in some parts of carbon steel and weathering steel, and there is no difference in corrosion products, mainly due to the role of alloy elements in the rust layer. The precipitation of Cu and Cr alloy elements in the weathering rust layer can resist the invasion of moisture and harmful ions in the atmosphere, and further corrosion of steel and base metal can be prevented, so as to achieve the effect of atmospheric corrosion resistance.
The company focuses on two markets at home and abroad, and has a group of 56 experienced sales elites and professional and technical personnel. It can provide customers with drawing design, CCS FH40 hull frame steel deep processing services and installation solutions. 20 years of project experience has provided high-quality carbon steel, alloy steel products and high-quality after-sales service to customers in many countries around the world. The company has won widespread praise from customers.
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