S355ML/NL EN 10025-4 Normalized Steel Plate Supplier

 

 

S355ML/NL EN 10025-4 Normalized Steel Plate Supplier

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:

• S355NL = normalized or normalized rolled (EN 10025-3)
• S355ML = thermomechanically rolled (TMCP) (EN 10025-4)

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.

 

S355ML vs S355NL – Normalized vs TMCP Delivery: Which One Should You Choose?

Both S355NL and S355ML have identical chemical composition and mechanical properties, including:

• Minimum yield strength 355 MPa
• Tensile strength 470–630 MPa
• Elongation ≥22 %
• Impact toughness ≥27 J at –50 °C (longitudinal)

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.

 

Chemical Composition – Ladle Analysis and Product Analysis Combined

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

 

Mechanical Properties – Full Thickness Range up to 200 mm

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

 

Available Specifications & Testing

• Thickness 6–200 mm
• Width 1500–4200 mm
• Length up to 18 m
• Z-quality Z25/Z35 in stock
• NDT 100 % UT EN 10160 S2/E2 (S3/E3 optional)
• All class approvals ex-stock

 

Why Choose Gangsteel for S355NL/S355ML

• Combined stock 6,000+ tons both grades
• Factory-direct price – 60–120 USD/ton lower
• Full processing & Z35 in stock
• Immediate delivery worldwide
• Exported to 90+ countries

 

FAQ

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.

 

Contact Gangsteel

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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