Used rails R50-R65: SPECIFICATIONS OF USED RAILS R50 R65:- 1. R50(51.67KG/Meter, GOST 7173-55) 2. R65(64.72KG/Meter, GOST 8161-75) Composition : C - 0.71 - 0.84%: Mm-0.75 - 1.25 % : Si- 0.18 - 0.55% : S - not more than 0.045% : P - not more than 0.035% Nominal Specification for R-50 (51.67KG/M, GOST-7173-75): Carbon - 0.4%- 0.58% Manganese - 0.75% â?? 0.88% Silicon - 0.13% â?? 0.28% Sulphur - 0-045% to MAX Phosphorous - 0.035% to MAX Arsenic - 0.13% to MAX Nominal Specification for R-65(64.72KG/M, GOST -81(65-75): Carbon - 0.4%- 0.58% Manganese - 0.75% â?? 0.88% Silicon - 0.13% â?? 0.28% Sulphur - 0-045% to MAX Phosphorous - 0.035% to MAX Arsenic - 0.13% to MAX