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Gangsteel – China's Leading Mill-Direct Supplier & Exporter of S355ML/NL EN 10025-4 Normalized & TMCP Low Temperature Structural Steel Plates
Gangsteel is the authoritative supplier for S355ML/NL EN 10025-4 normalized and TMCP low temperature steel plates. We are one of the few mills in the world that master both delivery conditions for this critical grade:
We keep combined stock of over 6,000 tons of S355NL + S355ML, thickness 6–200 mm, width 1500–4200 mm, length up to 18 m. All plates are produced with guaranteed –50 °C impact toughness (≥27 J longitudinal), low CEV ≤0.39, Z25/Z35 through-thickness quality in stock, and 100 % ultrasonic testing EN 10160 S2/E2 standard.
Full certification: EN 10204-3.1/3.2, PED, CPR, all major class approvals (DNV, ABS, LR, BV, CCS, KR).
Immediate delivery worldwide in 3–7 days. Full processing services available.
Both S355NL and S355ML have identical chemical composition and mechanical properties, including:
The only difference is the delivery condition and manufacturing route:
|
Property |
S355NL (EN 10025-3) |
S355ML (EN 10025-4) |
Winner for Most Projects |
|---|---|---|---|
|
Delivery Condition |
Normalized ormalized or normalized rolled |
Thermomechanical rolled (TMCP) |
S355ML |
|
Manufacturing Process |
Separate normalizing heat treatment (880–920 °C + air cool) |
Controlled rolling + accelerated cooling (no separate heat treatment) |
S355ML (energy saving, lower cost) |
|
Residual Stress |
Higher (due to normalizing) |
Very low (TMCP advantage) |
S355ML |
|
Flatness & Dimensional Tolerance |
Good |
Excellent (<3 mm/m) |
S355ML |
|
Weld HAZ Toughness |
Good |
Superior (finer grain in HAZ) |
S355ML |
|
Distortion in Fabrication |
Higher |
20-30 % less |
S355ML |
|
Through-Thickness Properties (Z-quality) |
Good |
Outstanding |
S355ML |
|
Production Cost |
Higher (extra heat treatment) |
Lower (single process) |
S355ML |
|
Price (2025 average) |
Baseline |
+60–100 USD/ton |
S355NL cheaper, but S355ML better value |
|
Market Preference (Offshore Wind) |
20–30 % |
70–80 % |
S355ML |
Conclusion from 15+ years experience: For 90 % of modern projects (especially offshore wind, Arctic oil & gas, jack-up rigs, heavy cranes), S355ML TMCP is the superior choice due to lower residual stress, better flatness, superior HAZ properties, and easier fabrication. The small price premium is quickly recovered through reduced welding distortion, lower preheat requirements, and higher productivity.
S355NL is still used when the specification explicitly requires normalized delivery or when the fabricator prefers traditional normalizing for very thick plates (>150 mm) in shop-controlled environments.
Gangsteel produces both versions with identical chemistry and properties – you get the same high quality regardless of delivery condition.
Both S355NL and S355ML have exactly the same chemical requirements.
|
Element |
Ladle Max (%) |
Product Deviation (%) |
Typical Actual (%) – Gangsteel Stock |
Role |
|---|---|---|---|---|
|
C |
0.18 |
+0.02 |
0.10–0.14 |
Low for weldability |
|
Si |
0.50 |
+0.05 |
0.20–0.40 |
Deoxidizer |
|
Mn |
0.90–1.65 |
+0.10 |
1.20–1.50 |
Strength |
|
P |
0.025 |
+0.005 |
≤0.018 |
Low for toughness |
|
S |
0.020 |
+0.005 |
≤0.012 |
Low inclusions |
|
Nb |
0.05 |
+0.01 |
0.02–0.04 |
Grain refiner |
|
V |
0.12 |
+0.02 |
0.05–0.10 |
Precipitation |
|
Al min |
0.020 |
+0.030 |
0.030–0.050 |
Grain refiner |
|
Ti |
0.05 |
+0.03 |
0.01–0.03 |
Nitride former |
|
Cr |
0.30 |
+0.05 |
≤0.25 |
Controlled |
|
Ni |
0.50 |
+0.05 |
≤0.40 |
Low-temp aid |
|
Mo |
0.10 |
+0.03 |
≤0.08 |
Minor |
|
Cu |
0.55 |
+0.03 |
≤0.35 |
Deoxidizer |
|
N |
0.015 |
+0.003 |
≤0.010 |
Low |
|
CEV max |
0.43 (t≤63 mm) / 0.45 (t>63 mm) |
N/A |
0.35–0.40 |
Excellent weldability |
Full chemical data: S355ML Chemical Composition EN 10025-4 Supplier
|
Thickness (mm) |
ReH min (MPa) |
Rm (MPa) |
A5 min (%) |
KV min (J) at –50 °C longitudinal |
|---|---|---|---|---|
|
≤16 |
355 |
470–630 |
22 |
27 |
|
16<t≤40 |
345 |
470–630 |
22 |
27 |
|
40<t≤63 |
335 |
470–630 |
22 |
27 |
|
63<t≤80 |
325 |
470–630 |
22 |
27 |
|
80<t≤100 |
315 |
470–630 |
22 |
27 |
|
100<t≤150 |
295–305* |
450–610 |
22 |
27 |
|
150<t≤200 |
275–295* |
450–610 |
22 |
27 |
*Gangsteel actual values 20–40 MPa above minimum. Hardness 140–180 HBW. Full tables: S355ML Mechanical Properties EN 10025-4 Plate Supplier
Q1: S355NL vs S355ML – which is better?A: S355ML (TMCP) is superior for most projects due to lower residual stress, better flatness, and superior HAZ properties. S355NL (normalized) is chosen when specification explicitly requires normalizing.
Q2: Preheating required?A: No preheat up to 80 mm for both grades. >80 mm: 75–100 °C max.
Q3: Z35 availability?A: Yes – large stock of both S355NL and S355ML + Z35 ready.
Q4: Price difference?A: S355NL is 60–100 USD/ton cheaper than S355ML, but S355ML is better value in most cases.
Q5: Density and hardness?A: 7.85 g/cm³, 140–180 HBW for both.
Q6: Maximum thickness?A: 200 mm with full properties for both grades.
Q7: Delivery time?A: Stock material 3–7 days worldwide.
Need S355NL 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 Normalized and TMCP S355NL/S355ML Plates.
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