P355GH executive standard: EN10028-2; P355NH executive standard: EN10028-3.
According to EN10020, P355GH and P355NH steel are non-alloy steels.
P355GH and P355NH steel can use normalizing rolling instead of normalizing according to the wishes of the manufacturer.
The chemical composition of P355GH and P355NH steel:
P355GH steel, material number 1.0473, C: 0.10-0.22, Si≤0.60, Mn: 1.10-1.70, P≤0.025, S≤0.015, Al all ≥0.020, N≤0.012 d, Cr≤0.30, Cu≤0.30, Mo ≤0.08, Nb≤0.020, Ni≤0.30, Ti≤0.03, V≤0.02, Nb+Ti+ V≤0.70
P355NH steel, material number 1.0565, C≤0.18, Si≤0.50, Mn: 1.10-1.70, P≤0.025, S≤0.015, Al all ≥0.020 c, N≤0.012 d, Cr≤0.30 e, Cu≤0.30 e, Mo≤0.08 e, Nb≤0.05, Ni≤0.05, Ti≤0.03, V≤0.10, Nb+Ti+ V≤0.12
c: If adding Nb, Ti, or V nitrogen fixing elements, the total aluminum (ie Altotal) content can be lower than the minimum value.
d: If only aluminum is used to fix nitrogen, Al/N≥2 shall apply.
e: (Cr+Cu+Mo)≤0.45%.
f: If the mass percentage of Cu exceeds 0.30%, the mass percentage of Ni should be at least half of the Cu content.