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Gangsteel – China's Leading Mill-Direct Supplier & Exporter of S355M (EN 10025-4) and S355MC (EN 10149-2) Steel Plates & Coils
Gangsteel is the most reliable supplier for both S355M structural plates (EN 10025-4) and S355MC cold-forming coils/plates (EN 10149-2), with the largest combined stock in Asia – over 8,000 tons ready for immediate delivery in thickness 6–200 mm (S355M plates) and 1.5–20 mm (S355MC coils/plates), width 1500–4200 mm, length/coil weight up to 18 m/30 tons. All material is genuine TMCP produced by top mills (HBIS, Shougang) with full European approvals and third-party inspection (DNV, ABS, LR, BV, CCS, KR, TÜV, SGS).
We supply both grades with Z35 through-thickness quality in stock for S355M, guaranteed bending values for S355MC, and 100 % UT EN 10160 S2/E2 standard for plates.
Immediate delivery worldwide in 3–7 days. Full processing services available.
Explore our complete en 10025 4 High Strength Structural Steel series for structural grades.
S355M and S355MC have the same nominal yield strength of 355 MPa, but they are completely different materials from different standards designed for different applications.
|
Property |
S355M (EN 10025-4) |
S355MC (EN 10149-2) |
Winner & Reason |
|---|---|---|---|
|
Standard |
EN 10025-4 (hot finished structural steels) |
EN 10149-2 (hot rolled for cold forming) |
Different markets |
|
Primary Application |
Welded structural components (offshore, bridges, cranes) |
Cold forming (bending, roll forming, pressing) |
S355M for welding, S355MC for forming |
|
Delivery Form |
Plates (mainly) |
Coils and cut plates (mainly coils) |
S355MC for coil-intensive production |
|
Low-Temperature Toughness |
Guaranteed –20 °C (S355M) / –50 °C (S355ML) |
No mandatory low-temp (optional –20 °C) |
S355M for cold environments |
|
Weldability |
Excellent (CEV ≤0.39) |
Good but not designed for heavy welding |
S355M superior for welded structures |
|
Formability (bending) |
Good |
Excellent (guaranteed r/t values) |
S355MC for cold forming |
|
Through-Thickness (Z35) |
Standard option |
Rarely required |
S355M for critical welds |
|
Typical Use |
Offshore wind towers, Arctic structures, heavy cranes |
Truck chassis, crane booms, agricultural machinery |
Different |
|
Price (November 2025) |
Higher |
Lower |
S355MC cheaper |
Bottom line: These two grades are not interchangeable.
Many customers confuse the two because both are TMCP 355 MPa steels, but they serve completely different markets.
Gangsteel supplies both grades with full certification and can help you choose the correct one for your application.
|
Element |
S355M (EN 10025-4) max % |
S355MC (EN 10149-2) max % |
Difference & Impact |
|---|---|---|---|
|
C |
0.14 |
0.12 |
Lower C in S355MC for better formability |
|
Si |
0.50 |
0.50 |
Same |
|
Mn |
1.60 |
1.60 |
Same |
|
P |
0.025 |
0.025 |
Same |
|
S |
0.020 |
0.015 |
Lower S in S355MC for better bending |
|
Nb |
0.05 |
0.09 |
Higher Nb in S355MC for grain control in forming |
|
V |
0.10 |
0.20 |
Higher V in S355MC for strength in thin gauges |
|
Ti |
0.05 |
0.15 |
Higher Ti in S355MC for formability |
|
Al min |
0.020 |
0.015 |
Similar |
|
CEV max |
0.39 |
0.39 |
Same |
The main difference is in microalloying levels – S355MC has higher Nb+V+Ti limits to achieve better formability in cold bending.
Full chemical data for S355M: S355M Chemical Composition EN 10025-4 Supplier
|
Property |
S355M (EN 10025-4) |
S355MC (EN 10149-2) |
Notes |
|---|---|---|---|
|
Yield Strength ReH (MPa) |
355 (≤16 mm) → 285–295 (>150 mm) |
355 (≤3 mm) → 315 (>8 mm, coil typical) |
S355M better in thick plates |
|
Tensile Strength Rm (MPa) |
470–630 |
470–620 |
Similar |
|
Elongation A80/A5 (%) |
≥22 |
≥20 (A80 for t≤3 mm) |
S355M better ductility |
|
Impact Toughness |
≥40 J at –20 °C (standard) |
No mandatory low-temp (optional –20 °C) |
S355M vastly superior |
|
Bending Test |
Not mandatory |
Guaranteed r/t values (excellent formability) |
S355MC for cold forming |
S355M is designed for welded structures with low-temp toughness. S355MC is designed for cold forming with guaranteed bending performance.
S355M has lower CEV and is specifically designed for welding (including high heat input SAW). S355MC is optimized for cold forming, not heavy welding – HAZ softening can occur with high heat input.
|
Application |
Recommended Grade |
Reason |
|---|---|---|
|
Offshore wind towers |
S355M |
Low-temp toughness, Z35, heavy welding |
|
Truck chassis, trailers |
S355MC |
Excellent cold formability, lighter weight |
|
Crane booms |
S355MC |
Bending for complex shapes |
|
Arctic structures |
S355M |
–20 °C impact mandatory |
|
Bridges (welded) |
S355M |
Better HAZ properties |
|
Cold-formed sections |
S355MC |
Guaranteed bending values |
Q1: Can I use S355MC instead of S355M to save money?A: No – they are for different applications. S355MC has no low-temperature guarantee and is not designed for heavy welding.
Q2: Can I use S355M for cold forming?A: Yes, but S355MC is better and cheaper for cold forming applications.
Q3: Which is better for offshore wind?A: S355M – low-temp toughness and Z35 are mandatory.
Q4: Price difference?A: S355MC is 80–150 USD/ton cheaper than S355M, but not interchangeable.
Q5: Do you supply S355MC in plates or only coils?A: We supply S355MC in both coils and cut-to-length plates.
Q6: Do you have both grades in stock?A: Yes – very large stock of both S355M plates and S355MC coils/plates ready.
Q7: Delivery time?A: Stock material 3–7 days worldwide.
Need S355M or S355MC plates/coils? Contact us for quotation within 2 hours.
Email: admin@gangsteel.com WhatsApp/WeChat/Mobile: +86 135 9887 9167 Website: https://gangsteel.net/
Gangsteel – Your Expert for Both Structural and Cold-Forming 355 MPa Grades.
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