High strength standard of nm450 wear-resistance for tube

S355J2 is a low-alloy high-strength steel, which can be treated to meet the requirements of Z-15, Z-25, Z-35 and level I, level II and level III flaw detection.The extension grades of S355J2 are S355J2, S355J2-Z35 and S355J2 + N-Z35, standard of NM450 wear-resistance. On the basis of S355J2, S355J2-Z35 increases the requirement of S355J2 steel plate thickness direction performance, namely Z-direction performance. S355J2 + N-Z35 is a heat treatment process which increases Z-direction properties and normalizing rolling (or normalizing).

standard of NM450 wear-resistance, Strip steel has obvious characteristics. First, it is thin and easy to bend, convenient for logistics and transportation, and saves logistics costs. Second, the surface quality of strip steel is good. Third, the strip steel is easy to process, and it can be processed only by straightening the bent part. Fourth, the strip steel has high precision and it is a good raw material for processing blades and saw blades. Strip steel is widely used in the manufacture of welded pipes, clamps, washers, spring blades, saw blades and other fields.

How to distinguish between hot rolled and cold rolled process?The hot-rolled steel sheet has low strength, easy production and processing, and good plasticity. The process performance of the hot-rolled steel plate is poor (air oxidation and low smoothness), but the plastic deformation is good. Generally, it is medium and thick plate, standard of NM450 wear-resistance, high compressive strength, high strength, and high surface smoothness. Cold-rolled steel sheets have high strength and relatively difficult production and processing, but they are not easy to deform and have high compressive strength.

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