High strength Q355GNH weathering steel plate steel coil

ASTM a588 steel beam Q355GNH weathering steel plate not only has high tensile and yield strength, but also has good atmospheric corrosion resistance due to its small copper content. Due to its high strength, its Q355GNH weathering steel plate weight is less than that of A36 steel section without reducing strength. At the same time, it is the best material for outdoor application, the surface is orange.

Special boiler steel is derived from carbon structural steel, Q355GNH weathering steel plate. The expression of boiler steel grade is similar to that of high-quality carbon structural steel, and the carbon content is usually 0.20%. The chemical composition of boiler steel is basically the same as that of high-quality carbon structural steel of the same brand, but the mechanical properties are strictly required, especially the impact toughness, and the aging sensitivity is required to be small. After deoxidation and removal of non-metallic inclusions, boiler steel has a uniform structure, the grain size is controlled at 3-7 grade, and the defects such as interlayer, shrinkage, porosity and porosity are relatively less.

Normalizing is to heat the steel parts to 30~80℃above the critical temperature for a period of time. Then the parts are taken out of the furnace and cooled in air. Since the cooling rate of normalizing is faster than that of annealing, the strength and hardness of normalized Q355GNH weathering steel plate are higher than that of annealed Q355GNH weathering steel plate, but the elimination of internal stress is not as good as annealing. The normalizing operation of Q355GNH weathering steel plate is simple, the cost is low, the productivity is high, and it is widely used in actual production.

The company specializes in hot rolled plates producing, steel plate processing, steel plates cutting, carbon steel plate weldding and exporting of wide and thick steel plates. BBN company has high-quality CNC Q355GNH weathering steel plate steel plate cutting processing equipment, professional technical personnel, and supporting marketing and after-sales service system. Sincerely welcome new and old customers to visit our company, BBBN company will always be your reliable choice.

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