This standard specifies the requirements for chemical composition, mechanical properties, and testing of hot-rolled medium and high tensile structural steel. It is the primary material specification for structural steel sections, plates, and bars used in welded, bolted, and riveted construction in India.
Specifies requirements for hot rolled medium and high tensile structural steel plates, sheets, sections and bars.
Quick Reference Values
Minimum yield stress (E250, t < 20mm)250 MPa
Ultimate tensile strength (E250)410 MPa
Minimum percentage elongation (E250)23%
Max Carbon content (E250A)0.23%
Max Carbon Equivalent (E250A)0.42
Key Formulas
CE = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15 — Carbon Equivalent Formula
Practical Notes
E250 Grade A is standard for most construction, but Grades B0 or C should be specified for dynamically loaded structures or cold environments where impact resistance is crucial.
Yield strength decreases as plate/section thickness increases; always verify the allowable stress based on actual thickness using Table 2.
Ensure the Carbon Equivalent (CE) is within specified limits for guaranteed weldability, especially for higher grades like E350 or E410.