Flaw detection of EN steel grade S450J0 material

Q345 steel belongs to low alloy high strength steel, which is mainly used in construction and engineering structure. Q345 steel contains a small amount of alloy elements, and it is widely used in various welding structures, such as bridges, vehicles, ships, pipelines, boilers, large vessels, storage tanks, heavy machinery and equipment, mining machinery, power stations, plant structures, low-temperature pressure vessels, textile machinery parts, etc. Q345 steel has higher yield strength than Q235 steel. Of course, the price of EN steel grade S450J0 material, Q345 steel is higher than that of Q235.

Ordinary medium and thick steel plate EN steel grade S450J0 material is a kind of deoxidized steel. The oxygen content of the steel liquid is relatively high, and a lot of gas will be produced during the production process to make the steel liquid boil, so it is also called boiling steel. Advantages: this kind of steel plate has smooth surface, good quality and easy processing. Because this kind of steel plate has no concentrated shrinkage cavity, the amount of deoxidizer is very small and the price is lower than other steel plates.

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Sulfur is a very harmful element in EN steel grade S450J0 material steel. The presence of sulfur will increase the hot brittleness of steel, reduce the various mechanical properties of EN steel grade S450J0 material steel, and reduce the weldability, impact toughness, fatigue resistance and corrosion resistance of steel.