p355gh steel 5cm plate cutting

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Oxygen (O) is a harmful element in steel such as P355GH steel. Although manganese, silicon, iron and aluminum are added to deoxidize the steel at the end of steelmaking, they can not be removed completely. During the solidification of molten steel, the reaction of oxygen and carbon in the solution will produce carbon monoxide, which can cause bubbles. Oxygen mainly exists in the form of FeO, MnO, SiO2, Al2O3 and other inclusions in the steel, which reduces the strength and plasticity of the steel. Especially, it has serious influence on fatigue strength and impact toughness.

The non-metallic inclusions of the hot-rolled p355gh steel steel sheet are elongated bands, which are not well combined with other metals. Therefore, compared with the anisotropy that can be observed from the shape and size of the crystal grains, the steel sheet has a larger potential The anisotropy results in poor ductility perpendicular to the rolling direction. The internal anisotropy of the p355gh steel cold-rolled steel sheet can be alleviated by annealing.

20 to 26mm thick p355gh steel product BBN steel supply: 20*3000*5000, 20.5*2370*7000, 21*1960*7950, 22*1800*8000, 22*1500*6000, 22*1500*6050, 22.5*1680*8450, 22*1300*4000, 22*2600*9000, 22*1800*9000, 22.5*2560*7150, 23.5*2560*7150, 25*1460*4000, 23*3000*11980, 23*2480*8450, 23*2650*6000, 24*1560*6200, 25.5*2330*8300, 23*3000*12000, 23.5*2080*8100, 23*2650*6550, 26*3010*8100.

p355gh steel, 20MnMoR steel plate adopts the process plan of EBT primary refining-LF refining-VD degassing treatment-vacuum protection pouring. The smelting process of 20MnMoR steel is as follows: an 80t electric arc furnace is used for initial smelting of molten steel, dephosphorization, 60tLF refining to adjust the composition, desulfurization. After VD degassing treatment, 53t ingot is finally poured under vacuum protection. The smelting analysis shows that all elements meet the requirements of customers.