Hot rolled EN10025-4 S420ML steel plates production process

The rise and fall of EN10025-4 S420ML steel plates, steel pipe price will be affected by many factors, such as market demand. If the construction of real estate industry, basic road construction and so on industries is booming, the sales volume of steel pipes will be very good, and the market supply will gradually increase. The market demand has a very important guiding significance for EN10025-4 S420ML steel plates, steel pipe manufacturers, dealers and agents in many regions.

The EN10025-4 S420ML steel plates plate products have passed the EU CE certification, and have been recognized by China, France, the United States, the United Kingdom, Germany, Italy, Japan, South Korea and other eight classification societies for high-strength ship plates. The steel strand products have passed the United States (PTI) certification. The EN10025-4 S420ML steel plates products enjoy a high reputation in the domestic and foreign markets. The products are applied to national key projects and sold to 37 countries and regions such as EU, Middle East, Southeast Asia and America.

Converter steelmaking: The furnace body of the converter can be rotated, and the steel plate is used as the outer shell, and the refractory is used as the inner lining. Converter EN10025-4 S420ML steel plates steelmaking does not require additional heating, because the molten iron is inherently high temperature, and it still continues to generate thermal oxidation reactions (from silicon, carbon and oxygen in molten iron).Because no more fuel is needed for heating, energy consumption is reduced.

The microstructure of the quenched and tempered alloy steel, EN10025-4 S420ML steel plates after conventional heat treatment is tempered sorbite. For parts with wear-resistant surface (such as gears and spindles), induction heating surface quenching and low-temperature tempering are carried out, and the surface structure is tempered martensite. The surface hardness can reach 55HRC-58HRC. After quenching and tempering, the yield strength of quenched and tempered alloy steel is about 800MPa, the impact toughness is 800kJ / m2, and the core hardness is 22HRC - 25HRC. If the cross-section size is large but not quenched, the properties will be significantly reduced.

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