S355ML vs NL Weldability EN 10025-4 Fine Grain Supplier

 

 

S355ML/NL Weldability EN 10025-4 Fine Grain Supplier

Gangsteel – China's Leading Mill-Direct Supplier & Exporter of S355ML/NL Weldability EN 10025-4 Fine Grain Plates

Gangsteel is your U.S.-focused expert for S355ML/NL weldability EN 10025-4 fine grain plates, delivering both S355ML (EN 10025-4 TMCP) and S355NL (EN 10025-3 normalized) with identical chemistry and mechanical properties optimized for superior welding in low-temperature environments. We stock over 6,000 tons combined, thickness 6–200 mm, width 1500–4200 mm, length up to 18 meters, with immediate U.S. delivery from Houston warehouse (7–10 days to West Coast, 5–7 days East Coast).

Both grades guarantee CEV ≤0.39 (typical 0.35–0.38 actual), no preheating up to 80 mm thickness, and fine grain structure for excellent HAZ toughness. Full certification: EN 10204-3.1/3.2, PED, CPR, third-party inspection (DNV-GL, ABS, Lloyd’s, BV, CCS, RINA, KR, TÜV, SGS). Z35 through-thickness in stock, 100 % UT EN 10160 S2/E2 standard.

Gangsteel provides free welding recommendations, heat-specific CET data, and AWS/ASME dual-cert for U.S. fabricators. Ideal for offshore wind monopiles (BOEM-compliant), Arctic LNG modules, and seismic bridge girders (AASHTO). Full processing in U.S.: plasma cutting (±0.4 mm), beveling (X/V/K), drilling, rolling, C5H priming (200 µm DFT). Explore our en 10025 4 High Strength Structural Steel series. For grade meaning, S355ML Meaning EN 10025-4 Structural Steel Supplier.

 

S355ML/NL Weldability – Identical Chemistry, TMCP Edge in HAZ

S355ML and S355NL have exactly the same chemical composition and mechanical properties, but S355ML's TMCP delivery provides superior weldability characteristics:

Weldability Factor	S355NL (Normalized)	S355ML (TMCP)	Advantage
CEV (typical actual)	0.35–0.40	0.34–0.38	S355ML lower
Preheat-free Welding	Up to 70–80 mm	Up to 80–100 mm	S355ML
HAZ Grain Size	ASTM 7–9	ASTM 8–10	S355ML finer
HAZ Toughness (CTOD)	≥0.30 mm at –40 °C	≥0.40 mm at –40 °C	S355ML superior
Residual Stress After Welding	Higher	20–30 % lower	S355ML
Distortion Control	Good	Excellent	S355ML
Heat Input Tolerance	2.5–3.5 kJ/mm	3.0–4.5 kJ/mm	S355ML higher

Welding consumables: Both grades use low-hydrogen electrodes (E7018-H4, ER70S-6). S355ML allows higher heat input (SAW up to 4.5 kJ/mm) with better HAZ properties.

Gangsteel provides WPS/PQR support and heat-specific data for both grades.

 

Chemical Composition – Identical for Both (Optimized for Weldability)

Element	C	Si	Mn	P	S	Nb	V	Al min	Ti	Cr	Ni	Mo	Cu	N	CEV max
S355ML/S355NL	0.18	0.50	0.90–1.65	0.025	0.020	0.05	0.12	0.020	0.05	0.30	0.50	0.10	0.55	0.015	0.43/0.45

Typical Gangsteel actual: C 0.10–0.14 %, CEV 0.35–0.38. Full: S355ML Chemical Composition EN 10025-4 Supplier.

 

Mechanical Properties – Identical for Both

Thickness (mm)	ReH min (MPa)	Rm (MPa)	A5 min (%)	KV min (J) at –50 °C
≤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	450–610	22	27
150<t≤200	275–295*	450–610	22	27

*Gangsteel 295 MPa to 180 mm. Full: S355ML Mechanical Properties EN 10025-4 Plate Supplier.

 

Why Choose Gangsteel for S355ML/NL Weldable Plates

• Combined stock 6,000+ tons both grades
• U.S. warehouse in Houston – 5–10 day delivery nationwide
• Factory-direct price – 60–120 USD/ton lower
• Full AWS/ASME dual-cert available
• Z35 quality in stock
• Immediate processing in U.S.

 

FAQ

Q1: S355ML vs S355NL weldability difference?

A: S355ML (TMCP) has lower residual stress and superior HAZ toughness, allowing higher heat input and less distortion. S355NL (normalized) is excellent but slightly more traditional.

Q2: Preheat requirements for U.S. winter welding?

A: No preheat up to 80 mm for both grades, even at –20 °F ambient. Use low-hydrogen consumables.

Q3: Price difference?

A: S355ML is 60–100 USD/ton higher than S355NL, but fabrication savings usually make it cheaper overall.

Q4: Z35 availability for U.S. projects?

A: Yes – large stock of both S355ML and S355NL + Z35 with full U.S. mill certs.

Q5: Delivery to California?

A: 7–10 days from Houston warehouse or 14–21 days direct from China.

 

Contact Gangsteel U.S. Team

For S355ML/NL weldable plates, quote now.

Email: admin@gangsteel.com U.S. Website: https://gangsteel.net/

Gangsteel – Weldable Low Temp Plates, U.S. Stock & Support.

 

 

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