IS 2062:2006 is the Indian Standard governing hot-rolled structural steel, superseding IS 1977:1996 and IS 8500:1991. This guide compares all 9 grades (E165-E650) and their sub-qualities to help:
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Select the optimal grade for structural projects
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Understand chemical and mechanical property differences
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Identify suitable applications for each variant
Steelmet Industries manufactures all IS 2062:2006 grades as:
✅ Steel plates (3-100mm thickness)
✅ Structural sections (beams, channels, angles)
✅ Round/square/flat bars (Ø5-300mm)
Grade Classification System
| Grade | Old Designation | Yield Strength (MPa) | Sub-Qualities | Key Characteristics |
|---|---|---|---|---|
| E165 | Fe 290 | 165 | – | Basic structural grade |
| E250 | Fe 410 W | 250 | A, B, C | Improved weldability in Quality C |
| E300 | Fe 440 | 300 | – | Medium strength |
| E350 | Fe 490 | 350 | – | Common construction grade |
| E410 | Fe 540 | 410 | – | High strength |
| E450 | Fe 570/590 | 450 | D, E | Micro-alloyed variants |
Sub-Quality Explanation:
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A: Standard quality (semi-killed/killed)
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B: Killed steel with room temp impact test
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C: Killed steel with -20°C impact test
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D/E: Micro-alloyed high-strength versions
Key Comparison Tables
1. Chemical Composition (Selected Grades)
| Element | E165 | E250B | E350 | E450E |
|---|---|---|---|---|
| C (max) | 0.25 | 0.22 | 0.20 | 0.22 |
| Mn (min) | 1.25 | 1.50 | 1.50 | 1.80 |
| P (max) | 0.045 | 0.045 | 0.045 | 0.045 |
| S (max) | 0.045 | 0.045 | 0.045 | 0.045 |
| CE (max) | – | 0.41 | 0.42 | 0.48 |
*Note: Quality C has stricter limits (P/S ≤0.040%)*
2. Mechanical Properties
| Grade | Tensile (MPa) | Yield (MPa) | Elongation (%) | Impact Test |
|---|---|---|---|---|
| E165 | 290 | 165 | 23 | Not required |
| E250B | 410 | 250 | 23 | 27J @ RT |
| E350 | 490 | 350 | 22 | – |
| E450E | 590 | 450 | 20 | 20J @ RT |
Applications Guide
| Grade | Best For | Form Available |
|---|---|---|
| E165 | Light structures, roofing | Plates, bars |
| E250C | Welded bridges, cryogenic | Plates, sections |
| E350 | Building frames, cranes | All forms |
| E450D/E | Heavy mining equipment | Plates, special sections |
Why Choose Steelmet Industries?
We provide:
✔ Full range of IS 2062:2006 grades
✔ Custom processing (cutting, drilling, bending)
✔ Mill test certificates (MTC) per EN 10204 3.1
✔ Just-in-time delivery across India
Request samples of any IS 2062 grade for your project testing!
FAQ Section
Q: Can E250A be used for welded structures?
A: Yes, but E250C is recommended for critical welds due to its -20°C impact toughness.
Q: Difference between E450D and E450E?
A: E450E has higher manganese (1.80% vs 1.60%) for improved strength.
Conclusion
Understanding IS 2062:2006 grade differences ensures optimal material selection for structural integrity. Steelmet Industries stocks all grades from E165 to E650 – contact our technical team today for project-specific recommendations.
