Used Rails R50 - R65 Chemical Composition Used Rails; C: 0, 54 - 0,82 Si: 0,18-0,40 Mn: 0, 60-1, 05 S: 0.04 max P: 0,035 max As.: 0, 01 max of Mass share Norms: R-50 GOST7173-75 and R-65 GOST-8165-75 The scrap consists of R-50 (51, 67 kg/m) R-65 (64,72 kg/m) Used Rail ISRI 27-29 ISRI-CODES; (27) Rail, Steel No.