Quick Answer
Quick Answer
IS 2062 is the Bureau of Indian Standards specification for hot-rolled low, medium, and high tensile structural steel. It covers seven grade families from E250 to E550, with chemical composition limits and mechanical property requirements that vary by sub-grade and thickness. IS 2062 is under mandatory BIS certification (Schedule II) in India.
IS 2062 is the foundational structural steel standard in India, published by the Bureau of Indian Standards (BIS). It applies to hot-rolled steel products — plates, strips, flats, rounds, squares, angles, channels, beams, and other sections — intended for structural, general engineering, and fabrication applications. The current edition (IS 2062:2011 with amendments) replaced the earlier single-grade standard with a multi-grade framework covering E250 through E550. Steel supplied against IS 2062 must carry a BIS Standard Mark as the standard is listed under Schedule II of the BIS (Certification) Regulations, making BIS certification mandatory for all domestic production and import.
Scope and Applicability
IS 2062 covers:
- Hot-rolled structural steel in plate, strip, flats, bars, rounds, squares, and structural sections (angles, channels, beams, columns)
- Thickness up to 100 mm for plates; sections per IS 808
- Applications: bridges, buildings, industrial structures, machinery frames, ship hulls, pressure vessels (lower temperature grades)
The standard does not govern cold-formed sections (IS 811), cold-rolled sheets (IS 513), or reinforcement bars (IS 1786).
Grade Coverage
IS 2062 defines grades by minimum yield strength (in MPa) with sub-grade suffixes indicating impact toughness level:
| Grade | Sub-grades | Impact Test Required | Typical Application |
|---|---|---|---|
| E250 | A, B, C | A: none; B: 0 °C; C: −20 °C | General structural use, angles, channels |
| E300 | A, B | A: none; B: 0 °C | Bridges, fabricated structures |
| E350 | A, B | A: none; B: 0 °C | High-strength structural, fabricated beams |
| E410 | A, B | A: none; B: 0 °C | Heavy structural, crane girders |
| E450 | A, B | A: none; B: 0 °C | Offshore, heavy plate |
| E550 | — | None specified | Wear-resistant, special structural |
Sub-grade A has no mandatory Charpy test; B requires testing at 0 °C; C at −20 °C.
Chemical Composition Requirements
Ladle (heat) analysis limits. All values are weight percent maximum unless a range is shown.
| Grade | C max | Mn max | Si max | S max | P max | CEV max |
|---|---|---|---|---|---|---|
| E250A | 0.23 | 1.50 | 0.40 | 0.045 | 0.045 | 0.42 |
| E250B | 0.22 | 1.50 | 0.40 | 0.040 | 0.040 | 0.41 |
| E250C | 0.20 | 1.30 | 0.40 | 0.035 | 0.035 | 0.39 |
| E300A | 0.20 | 1.30 | 0.45 | 0.040 | 0.040 | 0.40 |
| E300B | 0.20 | 1.30 | 0.45 | 0.035 | 0.035 | 0.40 |
| E350A | 0.20 | 1.50 | 0.45 | 0.040 | 0.040 | 0.43 |
| E350B | 0.20 | 1.50 | 0.45 | 0.035 | 0.035 | 0.43 |
| E410A | 0.20 | 1.60 | 0.45 | 0.040 | 0.040 | 0.45 |
| E410B | 0.20 | 1.60 | 0.45 | 0.035 | 0.035 | 0.45 |
| E450A | 0.20 | 1.60 | 0.50 | 0.040 | 0.040 | 0.47 |
| E450B | 0.20 | 1.60 | 0.50 | 0.035 | 0.035 | 0.47 |
| E550 | 0.22 | 1.70 | 0.50 | 0.040 | 0.040 | 0.50 |
CEV (Carbon Equivalent Value) = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15
Product analysis (check analysis) tolerance: +0.02% on C, +0.005% on S and P versus the ladle limits above.
Mechanical Properties
Properties vary with thickness. Values given are minimum unless a range is shown.
E250 (A, B, C)
| Thickness | YS min (MPa) | UTS (MPa) | Elongation min % (GL = 5.65√A) |
|---|---|---|---|
| ≤ 20 mm | 250 | 410–530 | 23 |
| > 20 mm, ≤ 40 mm | 240 | 410–530 | 23 |
| > 40 mm | 230 | 410–530 | 23 |
E300 (A, B)
| Thickness | YS min (MPa) | UTS (MPa) | Elongation min % |
|---|---|---|---|
| ≤ 20 mm | 300 | 440–570 | 22 |
| > 20 mm, ≤ 40 mm | 290 | 440–570 | 22 |
| > 40 mm | 280 | 440–570 | 22 |
E350 (A, B)
| Thickness | YS min (MPa) | UTS (MPa) | Elongation min % |
|---|---|---|---|
| ≤ 20 mm | 350 | 490–630 | 22 |
| > 20 mm, ≤ 40 mm | 330 | 490–630 | 22 |
| > 40 mm | 320 | 490–630 | 22 |
E410 (A, B)
| Thickness | YS min (MPa) | UTS (MPa) | Elongation min % |
|---|---|---|---|
| ≤ 20 mm | 410 | 540–670 | 20 |
| > 20 mm, ≤ 40 mm | 390 | 540–670 | 20 |
| > 40 mm | 380 | 540–670 | 20 |
E450 (A, B)
| Thickness | YS min (MPa) | UTS (MPa) | Elongation min % |
|---|---|---|---|
| ≤ 20 mm | 450 | 570–720 | 20 |
| > 20 mm, ≤ 40 mm | 430 | 570–720 | 20 |
| > 40 mm | 420 | 570–720 | 20 |
E550
| Thickness | YS min (MPa) | UTS (MPa) | Elongation min % |
|---|---|---|---|
| ≤ 20 mm | 550 | 650–830 | 16 |
| > 20 mm, ≤ 40 mm | 530 | 650–830 | 16 |
Additional Tests and Requirements
Charpy Impact Tests
Charpy V-notch test per IS 1757. Three specimens per test piece; average energy must meet the minimum; no single value below 70% of minimum.
| Grade / Sub-grade | Test Temperature | Average KV min (J) | Individual min (J) |
|---|---|---|---|
| E250B | 0 °C | 27 | 20 |
| E250C | −20 °C | 27 | 20 |
| E300B | 0 °C | 27 | 20 |
| E350B | 0 °C | 27 | 20 |
| E410B | 0 °C | 27 | 20 |
| E450B | 0 °C | 27 | 20 |
Test specimens are transverse (for plates ≥ 12 mm) or longitudinal (for thinner material). Specimen size: 10 × 10 × 55 mm standard; sub-size 7.5 × 10 mm permitted when material thickness requires.
Bend Test
Guided bend test per IS 1599. No cracking on the tension surface after bending through 180° around a mandrel:
| Grade | Mandrel Diameter |
|---|---|
| E250 | 2t (t = specimen thickness) |
| E300 | 2t |
| E350 | 3t |
| E410 | 3t |
| E450 | 4t |
| E550 | 4t |
Surface Finish and Tolerances
Dimensional tolerances (thickness, width, length, camber, flatness) are governed by IS 1852 for sections, plates, and strips.
Thickness and Section Size Limits
IS 2062 covers plates and strips from 2 mm to 100 mm thickness. Structural sections (per IS 808) are available in all grades, subject to rolling mill capability. For sections heavier than 100 kg/m, the purchaser and supplier must agree on applicable thickness-related property reductions.
BIS Mandatory Certification
IS 2062 is listed under Schedule II of the BIS (Conformity Assessment) Regulations. This means:
- All steel supplied to IS 2062 in India must bear the BIS Standard Mark (ISI Mark with licence number)
- Imported material must also hold a valid BIS licence or be accompanied by a Type Approval Certificate
- Mill test certificates must reference the BIS licence number of the producing mill
- Uncertified material cannot legally be sold as IS 2062 steel in India
Cross-Standard Equivalents
| IS 2062 Grade | ASTM Equivalent | EN / ISO Equivalent | JIS Equivalent |
|---|---|---|---|
| E250A | A36 | S235JR (EN 10025-2) | SS400 (JIS G 3101) |
| E250B | A36 | S235J0 | SS400 |
| E250C | A36 | S235J2 | SS400 |
| E300 | A572 Gr 42 | S275JR (EN 10025-2) | SM275 (JIS G 3106) |
| E350A/B | A572 Gr 50 | S355JR / S355J0 (EN 10025-2) | SM355 |
| E410A/B | A572 Gr 60 | S420N (EN 10025-3) | SM420 |
| E450A/B | A572 Gr 65 | S450J0 (EN 10025-2) | — |
| E550 | A656 Gr 80 | S550Q (EN 10025-6) | — |
Note: Equivalences are approximate. Chemical and property limits are not identical; always verify the specific purchase requirement.
MTC Verification Checklist
When verifying a mill test certificate for IS 2062 material, confirm:
- Standard designation states IS 2062:2011 (or current amendment) and the specific grade and sub-grade (e.g., IS 2062 E350B)
- BIS licence number of the producing mill is present on the MTC
- Heat number on the MTC matches physical heat/cast markings on the material
- Chemical composition (ladle analysis) for all required elements (C, Mn, Si, S, P, CEV) is within the grade limits
- Mechanical test results: YS, UTS, and elongation values meet the thickness-band requirements for the declared grade
- For B and C sub-grades: Charpy impact test results at the correct temperature, with individual and average values meeting requirements
- Bend test result stated as "satisfactory" or equivalent
- Test standard references for tensile (IS 1608) and impact (IS 1757) are cited
- The MTC is signed by the mill's authorised quality representative
Frequently Asked Questions
What does the sub-grade suffix A, B, or C mean in IS 2062?
The suffix indicates the notch toughness (impact) requirement. Sub-grade A has no mandatory Charpy impact test. Sub-grade B requires Charpy V-notch testing at 0 °C with a minimum average absorbed energy of 27 J. Sub-grade C requires testing at −20 °C. When the standard is specified without a suffix (e.g., simply IS 2062 E250), sub-grade A is implied.
Is IS 2062 E350 equivalent to ASTM A572 Grade 50?
They are close equivalents. IS 2062 E350 has a minimum yield strength of 350 MPa (≤ 20 mm) versus 345 MPa for A572 Gr 50, and a UTS range of 490–630 MPa. Chemical composition limits differ slightly, particularly for sulphur and phosphorus. For interchangeable use, verify both standards against the specific project specification — they are not certifiable substitutes without purchaser approval.
Why is BIS certification mandatory for IS 2062?
IS 2062 is listed in Schedule II of the BIS (Conformity Assessment) Regulations, which mandates BIS Standard Mark (ISI Mark) for structural steel used in India. This requirement protects buyers from sub-standard material entering critical infrastructure. Structural steel without a valid BIS licence number is non-compliant regardless of the chemistry or mechanical values on the MTC.
What is the Carbon Equivalent Value (CEV) and why does it matter?
The CEV is a formula-based index that predicts weldability. IS 2062 uses CEV = C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15. Higher CEV means greater risk of hydrogen-induced cracking (cold cracking) during welding. E250 grades allow up to 0.42%; higher-strength grades like E550 allow up to 0.50%. When CEV exceeds ~0.43, preheat is typically required per IS 9595 or equivalent welding procedures.
Does IS 2062 cover hollow sections and tubes?
No. IS 2062 covers plates, strips, flats, and open sections (angles, channels, beams). Hollow structural sections (HSS) are covered by IS 4923 (hot-formed) and IS 12778 (cold-formed). Steel tubes for structural use fall under IS 1161. The material for these products typically conforms to IS 2062 grades, but the product dimensions and tolerances are covered by the respective product standards.
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