Choosing between E350, E450, and S355 depends on one key factor: the balance between strength, weldability, and cost-efficiency. While all three are high tensile structural steel plates, their use cases vary based on yield strength, chemical makeup, and fabrication ease. At Hindustan Steel Corporation, we supply all three grades in custom-cut sizes with full test certifications to meet your application needs.
Where Are These Grades Commonly Used?
- E350 Plates are ideal for general construction, bridges, trailers, and earthmoving parts.
- E450 Plates are used in pressure vessels, heavy equipment, and infrastructure requiring higher yield strength.
- S355 Plates (EN 10025-2) are favored across European projects in offshore platforms, cranes, and fabrication-heavy applications
We assist buyers in grade selection based on project design, load conditions, and fabrication technique.
Mechanical Properties at a Glance
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) |
|---|---|---|---|
| IS 2062 E350 | Min 350 | 490–610 | 22 |
| IS 2062 E450 | Min 450 | 570–700 | 20 |
| EN 10025 S355 | Min 355 | 470–630 | 22 |
E450 offers higher strength but slightly reduced elongation, making E350 and S355 more versatile for forming/welding.
Chemical Composition Comparison
All three grades are low-alloy structural steels, but S355 has tighter EN-controlled chemistry, especially in carbon equivalent and impact-tested variants. E450 includes microalloying for added strength, while E350 remains balanced for forming + welding.
Standards and Equivalents
- E350 & E450 follow IS 2062 (Indian Standard) — widely accepted in Asian, African, and Gulf projects.
- S355J2 conforms to EN 10025-2, with impact testing at -20°C and strong presence in Europe, Africa, and high-spec tenders.
- Equivalents: E350 ≈ S355J2, E450 ≈ S420 or S460 (with limitations).
We provide mill test certificates and cross-grade equivalency support for global projects.
Sizes, Thicknesses & Dimensional Range
- Thickness: 5mm to 150mm+
- Widths: 1250mm to 3000mm
- Lengths: Up to 12000mm (cut-to-length available)
- Form: As-rolled, normalized, or quenched & tempered (Q+T for E450)
We offer precision cut-to-size services for all grades, ensuring minimal wastage and fast project turnaround.
Weldability, Formability & Cutting
- E350 & S355J2 are excellent for plasma cutting, laser, and MIG/TIG welding.
- E450 may require preheating and post-weld stress relief, especially in thick sections.
Our in-house team supports welding parameter selection, especially for heavy fabrication and offshore applications.
Which Grade Is Better for Fabrication?
- Choose E350 or S355J2 for:
- Complex forming
- Lightweight construction
- Faster fabrication timelines
- Choose E450 for:
- Heavy load-bearing structures
- High stress zones
- Quenched and tempered requirements
Still unsure? Our team offers free technical consultations with data sheets and application analysis.
Choosing Between E250, E350, and E450
| Consideration | Best Grade |
|---|---|
| Cost-effective builds | E250 |
| Heavy-duty strength | E450 |
| Balance of cost & strength | E350 |
| Cold regions | E350 / E450 BO |
| Complex fabrication | E250 / E350 BR |
Our team helps you finalize grade as per load-bearing, temperature, and welding conditions.
Why Buy All Three Grades from Hindustan Steel?
- Stockholder of all thicknesses in E350, E450 & S355J2
- Ready-for-export plates with 3.1 / 3.2 TC
- One-stop service: Grade guidance, CNC cutting, heat treatment coordination
- Trusted by OEMs, EPCs, and government infra contractors
Closely Related Grades
- S275JR (lower strength)
- E250BR / E250C
- S420NL / S460QL (next levels above E450)
- ASTM A572 Gr 50 (U.S. equivalent to S355)
We also offer custom equivalents for GCC, Africa, and EU project specifications.
Exporting These Grades Worldwide
We export E350, E450, and S355J2 plates to:
- UAE, Saudi Arabia, Oman
- South Africa, Kenya, Egypt
- Vietnam, Indonesia, Malaysia
- Germany, France, Poland
Plates are supplied in export-grade packing, with seaworthy wrapping, and full logistic support from mill to site.
How to Choose the Right Grade for Your Use
- For cost-effective fabrication: Choose E350 or S355J2
- For high-performance and strength: Choose E450
- For export projects in Europe: S355J2 is often specified in tenders
We help evaluate drawing loads, weldability needs, and standards compliance before recommending the grade.
Certifications & Inspection Options
- IS 2062 Compliance (2022 Edition)
- EN 10204 3.1 / 3.2 (TPI-approved)
- IBR Stamp for boiler & pressure parts
- CE / PED Certified for European tenders
UT / Impact / HIC / Thickness Testing available
All plates are heat marked + traceable + mill TC supplied.
Test Certificates & Approvals Offered
- EN 10204 3.1 / 3.2
- Charpy Impact Test
- Ultrasonic Testing (UT)
- CE, PED, IBR Approval on request
Every plate comes with traceable heat number, batch code, and mill compliance.
FAQs – E350 vs E450 vs S355
Are these grades suitable for offshore projects?
S355J2 and E450 are both used in offshore structures, but E450 needs preheating.
Is E450 more expensive than E350?
Yes, due to additional alloying and heat treatment requirements
What’s the minimum order for export?
As low as 5 tons, depending on size mix and port destination
Can I mix grades in a single container?
Yes, we allow mixed-grade dispatch with clear marking and packing ID.
Are these plates available ex-stock?
E350 and S355J2 usually are. E450 is often made-to-order or limited in stock.
What’s the lead time for cutting and dispatch?
Within 2–5 working days for ex-stock plates. Custom Q+T plates take longer.
What does the “J2” in S355J2 mean?
Impact-tested at -20°C, suitable for cold climates and structural resilience
Are these plates used in bridges?
Yes — S355J2 and E450 are both used in bridge girders and load-bearing decks.
What grade do Gulf EPC contractors prefer?
E350 is widely accepted; S355J2 is preferred for EN-compliant projects.
How do I compare Indian and EN grades?
Use our equivalence chart or request a consult — we provide BIS to EN cross-maps.
Which is lighter: E350 or E450?
Weight per sq.m remains the same — but E450 can reduce thickness for same load, reducing net tonnage.
Are these plates rust-resistant?
No, unless treated. Request shot blasting + primer coating for rust prevention
Can I get these plates laser cut?
Yes — especially for E350 and S355. E450 can be cut with laser/plasma if preheated.
Can I get ready beveling for welding?
Yes — we offer custom edge prep, V-groove, and beveling on request
Request a Datasheet or Best Price NowSend us your project requirements — we’ll revert within 24 hours with:
- Best pricing (EXW / CIF / FOB)
- Mill Test Certificate sample
- Cutting or fabrication timelines
- Equivalency mapping (if needed)