The common EN 10025 S690QL high strength steel specifications

Hydrogen (H) is the most harmful element in general steel such as EN 10025 S690QL high strength steel. Hydrogen dissolved in steel will cause hydrogen embrittlement, white spots and other defects. Hydrogen, like oxygen and nitrogen, has very little solubility in solid steel. It dissolves into liquid steel at high temperature, and accumulates in the structure without time to escape when cooling, forming high-pressure micro pores, which greatly reduce the plasticity, toughness and fatigue strength of steel, and even cause cracks and brittle fracture in severe cases. "Hydrogen embrittlement" mainly occurs in martensitic steel, but not very prominent in ferrite steel, and generally increases with hardness and carbon content.

A572 Gr50 steel plate is American standard low alloy high strength plate, which belongs to high strength low alloy Nb + V structural steel plate. EN 10025 S690QL high strength steel, A572 Gr50 steel is widely used in mining machinery, construction machinery, trucks, bridges and pressure vessels, especially in the construction and machinery parts with high requirements of weldability and toughness.

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Thin EN 10025 S690QL high strength steel, steel plate is mainly used in automobile industry, aviation industry, enamel industry, electrical industry, machinery industry and other departments. The main requirement of thin steel plate is to facilitate bending and forming. The thinner the steel plate is, the easier it is to bend. The common specifications of thin steel plate include thickness less than 4mm, width about 500-1500mm and length about 1.5-4m.