Specifications of used rail scrap ( r-45 to r-65): Chemical specifications for scrap railway track metal: -1. Caduim cd :0.0006% 2. Chromium cr :0.6205% 3. Copper cu :0.2507% 4. Cobalt co :0.0046% 5. Lead pb :0.0149% 6. Molybdenum mo :0.003% 7. Nickel ni :0.141% 8. Tin sn :0.001% 9. Silver ag :0.0005% 10. Zinc zn :0.349% 11. Iron fe :75.21% 12. Carbon :0.04 % (maximum) rejection at 0.06% Impurities :23.33% (calculation) total 76.668% The following traces of elements should be avoided & should not be there:. Carbon :0.65 - 0.75% (in the railway track) Manganese :0.65 - 0.80% Sulphur :0.06% max. Phosphorus :0.035% Ash :0.01 max mass share