IS 2062 is India's primary structural steel standard, specifying hot rolled medium and high tensile steel used in bridges, buildings, industrial structures, and fabricated assemblies. It defines six grades from E250 to E550, covering mild to high tensile performance. Published by the Bureau of Indian Standards (BIS), it is the most referenced steel specification in Indian construction and engineering.
Technical Overview
IS 2062:2011 (the current revision, superseding IS 2062:2006) specifies chemical composition, mechanical properties, and testing requirements for hot rolled steel products — plates, strips, sheets, flats, bars, angles, channels, and beams. The standard categorises grades by minimum yield strength: E250 is the workhorse mild steel grade, while E350 and E410 are used where higher strength reduces structural weight. Each grade exists in sub-qualities (A, B, C, BR, B0, C0) that define impact test temperature and notch toughness requirements — critical for structures exposed to low temperatures or dynamic loading. Chemical limits control carbon equivalent to ensure weldability across all grades.
Grades & Mechanical Properties
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Notes |
|---|---|---|---|---|
| E250 | ≥ 250 MPa | 410–530 MPa | ≥ 23% | General structural use — most widely stocked grade |
| E300 | ≥ 300 MPa | 440–570 MPa | ≥ 22% | Medium strength structural applications |
| E350 | ≥ 350 MPa | 490–630 MPa | ≥ 22% | High-strength framing, crane girders, heavy fabrication |
| E410 | ≥ 410 MPa | 540–680 MPa | ≥ 20% | Heavy structures, offshore components |
| E450 | ≥ 450 MPa | 570–720 MPa | ≥ 18% | High tensile structural — specialised applications |
| E550 | ≥ 550 MPa | 670+ MPa | ≥ 16% | Quenched and tempered; heavy industrial use |
Values are minimum requirements unless otherwise stated. Always verify with the current edition of the standard and the mill test certificate.
Chemical Composition Highlights
- E250: C ≤ 0.23%, Mn ≤ 1.50%, S ≤ 0.045%, P ≤ 0.045%
- Carbon equivalent (CE) controlled for weldability
- E350 and above: micro-alloyed with Nb/V for strength without excess carbon
Common Applications
- Structural framing for industrial buildings and warehouses
- Railway bridges, road bridges, and flyovers
- Transmission line towers and telecom structures
- Pressure vessels and storage tanks (lower grade)
- Ship hulls and marine structures
- Heavy fabrication — crane jibs, hoppers, chutes
- Automotive chassis and commercial vehicle frames
International Equivalents
EN 10025-2 S275
European equivalent for E250 in structural applications
EN 10025-2 S355
European equivalent for E350 grade
ASTM A36
US equivalent — similar yield and tensile to E250
ASTM A572 Gr.50
US equivalent for E350 high-strength low-alloy
JIS G3101 SS400
Japanese equivalent — comparable yield strength
Frequently Asked Questions
What is IS 2062 steel?
What is the difference between IS 2062 E250 and E350?
Is IS 2062 steel weldable?
What is the IS 2062 equivalent in Europe?
What forms does IS 2062 steel come in?
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