"r65 Gost 8156.75 Weight 64. 72 Kg/metER" "R50 GOST 7173.75 WEIGHT 51.67 KG/METER" "C: 0.54% - 0.82%" "C: 0.54% - 0.82%" "Si: 0.18 - 0.40%" "Si: 0.18%- 0.40%" "MN :0.60% - 1.05%" "MN: 0.60% - 1.05%" "S: 0.04% - MAX" "S : 0.04%- MAX" "P: 0.035% AS- 0.01 Mix ofmax share Mix of mass share" "P: 0.035% AS- 0.01 Mix ofmax share Mix of mass share"