Nominal Specification for R50 51.67 kg/m GOST 7173.75 Carbon (C) 0.54% to 0.82% Manganese (Mn) 0.60% to 1.05% Silicon (Si) 0.18% to 0.40% Sulphur (S) 0.04% to Maximum Phosphorous (P) 0.035% AS- 0.01 MIX OF MASS SHARE Nominal Specification for R65 64.72 kg/m GOST 8165.75 ----------------------------------------------------------------------------------------------- Carbon (C) 0.54% to 0.82% Manganese (Mn) 0.60% to 1.05% Silicon (Si) 0.18% to 0.40% Sulphur (S) 0.04% to Maximum Phosphorous (P) 0.035% AS-0.01MIX OF MASS SHARE
