The company adheres to the principle of integrity, standardization and efficiency, wins the market with technology, gains reputation with creative services, and wholeheartedly provides customers with high-quality A514 grade E quenched and tempered steel, efficient and fast services. Facing the future, adhere to independent innovation.
S355J2 steel plate rolling process is controlled rolling process. In the rolling process, the ingot rolling temperature is 1000-1050℃; in the first stage, the low-speed and large reduction rolling process is adopted, the high-temperature stage is 950-1000℃, the A514 grade E quenched and tempered steel rolling speed is 1.6-2.0m/s, the single reduction rate is 15-20%, and the cumulative reduction rate is 40-45%, so as to ensure sufficient deformation of ingot. In the first stage, the start rolling temperature is 910-930℃, and the finish rolling temperature is ≤ 870℃.As a basic building material, steel plates are currently widely used in automobiles, shipbuilding, chemical industry, aerospace and other fields. Reasonable selection of flaw detection methods to ensure the quality of A514 grade E quenched and tempered steel steel plates is of great significance to safe production. Common defects of steel plates are folding, inclusion, shrinkage, air bubbles, delamination and cracks. These problems can be discovered in time through flaw detection.
A514 grade P alloy structural steel chemical composition (melting analysis)% C: 0.12-0.21, Si: 0.20-0.35, Mn: 0.45-0.70, P max.: 0.035, S max.: 0.035, Ni: 1.20-1.50, Cr: 0.85-1.20, Mo: 0.45-0.6.0, B: 0.001-0.005 The mechanical properties in thickness (mm)T≤65 Yield strength (≥Mpa): 690 Tensile strength (Mpa):760-895 Elongation in ≥,%: 18
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