P355NH steel plate belongs to one of the European standard pressure vessel steel plate, belonging to the medium pressure pressure vessel steel plate, and Chinese Q345R similar.
P355NH steel plate C : 0.10 -- 0.22;
P355NH steel plate Si : ≤0.60;
P355NH steel plate Mn : 1.10 -- 1.70;
P355NH steel plate P: ≤0.025;
P355NH steel plate S: ≤0.015;
Mechanical properties of P355NH steel plate
P355NH steel plate tensile strength: 510 -- 650MPa;
Yield strength of P355NH steel plate: ≥345MPa;
Elongation of P355NH steel plate: ≥20%;
P355NH steel plate impact energy: 27J;
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