welding methods of EN S355M steel plates

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 EN S355M steel plates are higher than that of annealed EN S355M steel plates, but the elimination of internal stress is not as good as annealing. The normalizing operation of EN S355M steel plates is simple, the cost is low, the productivity is high, and it is widely used in actual production.

The thickness of cold-rolled steel sheets is generally relatively small, and the thickness of hot-rolled plates can be larger. The surface quality, appearance, and dimensional accuracy of cold-rolled steel sheets are better than those of hot-rolled plates, and the thickness of cold-rolled steel sheets can be rolled as thin as about 0.18mm. EN S355M steel plates, Hot-rolled plates has high strength, good toughness, easy processing and good weldability and other excellent properties.

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