This part of EN 13674 specifies flat bottom Vignole railway rails from 27 kg/m to, but excluding 46 kg/m.Five pearlitic steel grades are specified covering a rail hardness range of 200 HBW to 390 HBW and include non heat treated non-alloy steels, non-heat-treated alloy steels and heat-treated non-alloy steels.There are 13 rail profiles specified in this European Standard, but these may not be available in all steel grades.