S355NL steel plate mechanical properties S355NL implementation standard

S355NL steel plate mechanical properties S355NL implementation standard

S355N and S355NL belong to low-alloy high-strength plates, which implement the European low-alloy standard: EN10025-3. S355N is equivalent to Q345E of the national standard, N stands for normalizing, L stands for low carbon, material grade: S355NL Digital code: 1.0546

S355N, S355NL Delivery Status: Hot Rolled, Normalized, Can Be Delivered According to Customer's Specific Requirements The main reason for the unqualified low-temperature impact toughness of S355NL steel is mixed crystal. In addition, the presence of inclusions also affects the low-temperature toughness to a certain extent. Therefore, in the control of smelting components, the content of smelting components was increased to 0.025% to improve the inhibition effect of unsoluble TN on grain growth during heating. In the case of ensuring the final rolling temperature during the rolling process, the rolling rhythm is increased and the heating temperature is reduced. After the improvement, the low-temperature impact toughness was significantly improved, and among the 30 batches of continuous production, 28 batches passed the initial inspection, and the initial inspection pass rate reached 93.3%.