A709 grade 50W structural steel sheet, Q460 material is a low-alloy high-strength steel. Q stands for the strength of steel. 460 means that plastic deformation occurs only when the strength of the steel reaches 460MPa. That is, when the external force is released, the steel can only maintain the shape of the force and cannot return to its original shape. This strength is greater than that of ordinary steel. Tensile strength is 550-720MPa, elongation: 17%, Q460 material is made by adding Cr, N, V, Ti and other alloying elements on the basis of 16Mn steel.
Ordinary medium and thick steel plate A709 grade 50W structural steel sheet 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.
As the thickness and hardness of A709 grade 50W structural steel sheet increase, the tendency to crack at the cutting edge increases. In order to prevent the A709 grade 50W structural steel sheet from cutting cracks, preheating should be carried out before A709 grade 50W structural steel sheet cutting. Special attention should be paid to preheating to make the entire A709 grade 50W structural steel sheet interface evenly heated to avoid local overheating in the area contacting the heat source. If the whole A709 grade 50W structural steel sheet cannot be preheated, the partial preheating method can be used instead.
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