Another big difference between the two steel plates is the difference in surface conditions. The surface of the P460N steel standard cold-rolled steel sheet is processed very delicately in the form of matt finish rolling (pear skin processing) and bright finish rolling due to the cooperation of cold rolling and quenched and tempered rolling. The surface of the hot-rolled steel sheet used in ordinary processing is in the state of pickling the oxide scale generated during hot rolling, so it is rough and does not have the uniform state of the P460N steel standard cold-rolled steel sheet.
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P460N steel standard, SA533 GrB CL2 steel plate is an American Standard vessel steel plate, which is in accordance with ASME SA533 / SA533M. And it is quenched and tempered Mn-Mo and Mn-Mo-Ni alloy steel plate.The chemical composition of SA533 GrB CL2 steel plate is C: 0.25, Mn: 1.15-1.50, Mo: 0.45-0.60, Ni: 0.40-0.70, Si: 0.15-0.40, P: 0.012, S: 0.015, Cu: 0.10, V: 0.01.
The main raw material of P460N steel standard, hot rolling coil is billet. After heating the billet, the strip made from the coarse and fine rolling mill is cooled to a certain temperature by specific cooling, and then the cooled steel strip is made into rolled steel strip by coiler. But generally, according to the buyer's demand, the manufacturer can further process the cooled steel strip into steel plate or flat coil and other products.