Quick Reference Values
Carbon Content0.38 to 0.47 percent
Manganese Content0.50 to 0.80 percent
Maximum Sulphur0.050 percent
Maximum Phosphorus0.050 percent
Minimum Tensile Strength580 MPa
Minimum Elongation (Gauge Length 5.65√A)20 percent
Practical Notes
While IS 1450 provides baseline specifications, mainline Indian Railways projects typically mandate IRS (Indian Railway Standard) T-1 specifications. IS 1450 is often referenced for industrial, private sidings, or light rail networks.
Bolt holes in fish plates must be drilled and not punched, as punching can induce micro-cracks that severely reduce the fatigue life of the joint under dynamic train loads.
Ensure standard branding/marking includes the manufacturer's initial, year of manufacture, and weight of the rail for traceability.