P295GH钢板化学成分：
C Si Mn P S Cr Cu
0.08-0.20 ≤0.40 0.90-1.50 ≤0.025 ≤0.010 ≤0.30 ≤0.30
Mo Nb Ni Ti V N Alt
≤0.08 ≤0.020 ≤0.30 ≤0.03 ≤0.02 ≤0.012 ≥0.020
C Si Mn P S Cr Cu
0.08-0.20 ≤0.40 0.90-1.50 ≤0.025 ≤0.010 ≤0.30 ≤0.30
Mo Nb Ni Ti V N Alt
≤0.08 ≤0.020 ≤0.30 ≤0.03 ≤0.02 ≤0.012 ≥0.020
