0.07% Carbon (C), 0.9-1.4% Manganese (Mn), 0.4-0.7% Silicon (Si), 0.025% Phosphorus (P), 0.035% Sulphur (S), 0.15% Nickel (Ni), 0.15% Chromium (Cr), 0.15% Molybdenum (Mo), 0.03% Vanadium (V), 0.05-0.15% Aluminum (Al), 0.02-0.12% Zirconium (Zr), 0.05-0.15% Titanium (Ti), 0.5% Copper (Cu)