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Gangsteel – China's Leading Mill-Direct Supplier & Exporter of S355M vs S355ML EN 10025-4 Impact Tested Steel Plates
Gangsteel is the most trusted supplier for both S355M and S355ML plates under EN 10025-4, with the largest combined stock in Asia – over 8,000 tons ready for immediate delivery in thickness 6–200 mm, width 1500–4200 mm, length up to 18 m. All plates are 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, 100 % UT EN 10160 S2/E2 standard, and full documentation.
Explore our complete en 10025 4 High Strength Structural Steel series for all grades.
S355M and S355ML are identical twin grades in EN 10025-4 with the same chemistry, same strength, same weldability, and same TMCP delivery condition.
The only difference is the Charpy V-notch impact test temperature:
|
Property |
S355M |
S355ML |
Winner for Impact-Critical Projects |
|---|---|---|---|
|
Standard |
EN 10025-4 |
EN 10025-4 |
— |
|
Impact Test Temperature |
–20 °C |
–50 °C |
S355ML |
|
Minimum KV (longitudinal) |
≥40 J |
≥27 J |
S355ML(tougher at lower temp) |
|
Typical Actual KV (Gangsteel) |
80–200 J at –20 °C |
100–250 J at –50 °C |
S355ML |
|
Yield Strength ReH (MPa) |
355 → 285–295 (by thickness) |
Identical |
Tie |
|
Tensile Strength Rm (MPa) |
470–630 |
Identical |
Tie |
|
Elongation A5 (%) |
≥22 |
Identical |
Tie |
|
CEV max |
0.39 |
Identical |
Tie |
|
Preheat-free Welding (mm) |
Up to 80 |
Up to 80 |
Tie |
|
Price (November 2025) |
Baseline |
+80–150 USD/ton |
S355M cheaper, S355ML better value in cold |
|
Market Share (Offshore Wind) |
15–25 % |
75–85 % |
S355MLdominates |
Bottom line: If your lowest service temperature is above –20 °C → S355M is sufficient and slightly cheaper. If your lowest service temperature is below –20 °C (most offshore wind, Arctic, cold-region bridges) → S355ML is mandatory and has become the default choice in 90 % of new projects.
The price difference is easily justified by the much higher safety margin against brittle fracture in low temperatures.
S355M and S355ML have exactly the same chemical requirements.
Ladle Analysis (max % unless noted)
|
Element |
C |
Si |
Mn |
P |
S |
Nb |
V |
Al min |
Ti |
Cr |
Ni |
Mo |
Cu |
N |
CEV max |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
S355M / S355ML |
0.14 |
0.50 |
1.60 |
0.025 |
0.020 |
0.05 |
0.10 |
0.020 |
0.05 |
0.30 |
0.50 |
0.10 |
0.55 |
0.015 |
0.39 |
Typical Gangsteel actual values: C 0.09–0.12 %, CEV 0.34–0.37.
Full chemical data: S355ML Chemical Composition EN 10025-4 Supplier
|
Thickness (mm) |
ReH min (MPa) |
Rm (MPa) |
A5 min (%) |
KV min (J) at test temperature |
|---|---|---|---|---|
|
≤16 |
355 |
470–630 |
22 |
S355M: 40 J @ –20 °C S355ML: 27 J @ –50 °C |
|
16<t≤40 |
345 |
470–630 |
22 |
same |
|
40<t≤63 |
335 |
470–630 |
22 |
same |
|
63<t≤80 |
325 |
470–630 |
22 |
same |
|
80<t≤100 |
315 |
470–630 |
22 |
same |
|
100<t≤150 |
295 |
450–610 |
22 |
same |
|
150<t≤200 |
285–295* |
450–610 |
22 |
same |
*Gangsteel actual 295 MPa to 180 mm. Hardness 140–180 HBW. Full tables: S355ML Mechanical Properties EN 10025-4 Plate Supplier
Both grades have the same very low CEV, so welding behaviour is identical:
|
Grade |
Price Level (November 2025) |
When to Choose |
|---|---|---|
|
S355M |
Baseline |
Service temperature ≥ –20 °C |
|
S355ML |
+80–150 USD/ton |
Service temperature < –20 °C (offshore wind, Arctic, cold bridges) |
The extra cost of S355ML is easily justified by the much higher safety margin against brittle fracture in low temperatures.
Q1: S355M vs S355ML – which is better for offshore wind?
A: S355ML is now the standard choice for offshore wind (used in 90 % of new projects) because it guarantees impact toughness at –50 °C instead of –20 °C. Most offshore wind specifications (DNV-OS-B101, Norsok M-120) require –40 °C or –50 °C design temperature for safety margin.
Q2: Are the mechanical properties identical except impact temperature?
A: Yes – yield strength, tensile strength, elongation, hardness, density, and weldability are exactly the same. Only the Charpy impact test temperature and minimum energy differ.
Q3: Price difference today?
A: S355ML is approximately 80–150 USD/ton higher than S355M (November 2025 market), but the extra toughness is worth it for any project below –20 °C service temperature.
Q4: Can I use S355M instead of S355ML to save money?
A: Only if your specification allows it and the lowest service temperature is above –20 °C. Most modern offshore and cold-region projects require S355ML.
Q5: Do you have both grades in stock right now?
A: Yes – very large stock of both S355M and S355ML in all common thicknesses, ready for immediate delivery.
Q6: Z35 availability for both grades?
A: Yes – large stock of S355M + Z35 and S355ML + Z35 ready.
Q7: Delivery time to Europe or USA?
A: From ready stock: 7–12 days to Rotterdam, Antwerp, Houston, or Los Angeles.
Need S355M or S355ML plates? 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 S355M and S355ML Impact Tested Plates.
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