S355ML Mechanical Properties EN 10025-4 Plate Supplier

 

 

S355ML Mechanical Properties EN 10025-4 Plate Supplier

Gangsteel – China's Leading Mill-Direct Supplier & Exporter of S355ML Mechanical Properties EN 10025-4 Steel Plates

Gangsteel is the professional supplier you can rely on for S355ML mechanical properties EN 10025-4 plates. We maintain the largest ready stock of S355ML in Asia – over 5,000 tons permanently available in thickness 6–200 mm, width 1500–4200 mm, length up to 18 meters. All plates are genuine TMCP (thermomechanical controlled process) produced, with full EN 10204-3.1/3.2 certificates, third-party inspection (DNV, ABS, LR, BV, CCS, KR, TÜV, SGS), Z25/Z35 through-thickness quality, and 100 % ultrasonic testing EN 10160 S2/E2 standard.

We deliver worldwide in 3–7 days and offer complete processing: plasma/oxy cutting, beveling, drilling, rolling, priming.

Direct mill price – 60–120 USD/ton lower than traders.

 

What is S355ML Mechanical Properties EN 10025-4?

S355ML is a thermomechanically rolled (TMCP) weldable fine-grain structural steel specified in EN 10025-4:2004 (current version 2019).

The mechanical properties are the core reason S355ML is the most popular grade in the entire EN 10025-4 series:

• Minimum yield strength 355 MPa (transverse)
• Tensile strength 470–630 MPa
• Minimum elongation 22 %
• Guaranteed impact toughness ≥ 27 J at –50 °C (longitudinal)
• Very low CEV ≤ 0.39 → excellent weldability without preheating up to 80 mm
• Fine grain structure → superior fatigue resistance and low-temperature performance

These properties make S355ML the first choice for offshore wind towers, Arctic structures, jack-up rigs, heavy cranes, and cold-region bridges where both high strength and –50 °C toughness are required.

For a quick overview of the grade designation, see our article S355ML Meaning EN 10025-4 Structural Steel Supplier.

 

Chemical Composition – Ladle Analysis and Product Analysis Combined

The chemical composition directly supports the excellent mechanical properties of S355ML.

Element	Ladle Max (%)	Product Deviation (%)	Typical Actual (%) – Gangsteel Stock	Role in Mechanical Properties
C	0.14	+0.02	0.09–0.12	Low C = better weldability & HAZ toughness
Si	0.50	+0.05	0.20–0.40	Deoxidizer; stable ferrite for ductility
Mn	1.60	+0.10	1.20–1.50	Main strength contributor
P	0.025	+0.005	≤0.018	Reduces brittleness at low temp
S	0.020	+0.005	≤0.015	Low inclusions = higher KV values
Nb	0.05	+0.01	0.02–0.04	Grain refiner → finer structure → higher toughness
V	0.10	+0.02	0.04–0.08	Precipitation strengthening
Al min	0.020	+0.030 (total)	0.025–0.045	Grain refiner & deoxidizer
Ti	0.05	+0.03	0.01–0.03	Nitride former for grain pinning
Cr	0.30	+0.05	0.10–0.25	Controlled for balanced hardenability
Ni	0.50	+0.05	0.20–0.40	Improves low-temp transition temperature
Mo	0.10	+0.03	≤0.05	Minor HAZ improvement
Cu	0.55	+0.03	0.20–0.35	Deoxidizer; slight corrosion benefit
N	0.015	+0.003	≤0.012	Low for clean steel
CEV max	0.39	N/A	0.32–0.38	Key for weldability & toughness

Full chemical details: S355ML Chemical Composition EN 10025-4 Supplier

 

Mechanical Properties – Full Thickness Range up to 200 mm (Transverse values)

S355ML maintains excellent mechanical properties even in very thick plates thanks to TMCP.

Thickness (mm)	ReH min (MPa)	Rm (MPa)	A5 min (%)	KV min (J) at –50 °C longitudinal
≤ 16	355	470–630	22	27
>16 ≤ 40	345	470–630	22	27
>40 ≤ 63	335	470–630	22	27
>63 ≤ 80	325	470–630	22	27
>80 ≤ 100	315	470–630	22	27
>100 ≤ 120	305	450–610	22	27
>120 ≤ 150	295	450–610	22	27
>150 ≤ 200	285–295*	450–610	22	27

• For t > 150 mm, minimum yield is 285–295 MPa by mill agreement. Gangsteel guarantees 295 MPa up to 180 mm, 285 MPa to 200 mm.

Typical Gangsteel actual values are 20–40 MPa above minimum across all thicknesses.

Hardness: 140–180 HBW Density: 7.85 g/cm³ Fatigue strength: 170–190 MPa at 10^7 cycles (R=0.1) Full mechanical data sheet: S355ML Data Sheet EN 10025-4 Steel Properties Supplier

 

Comparison Within EN 10025-4 Family

Grade	Yield (≤16 mm)	Impact Temp	CEV max	Preheat-free (mm)	Typical Use
S275M/ML	275 MPa	–20 / –50 °C	0.38	up to 100	Light structures
S355M	355 MPa	–20 °C	0.39	up to 80	Bridges, machinery
S355ML	355 MPa	–50 °C	0.39	up to 80	Offshore wind, Arctic
S420M/ML	420 MPa	–20 / –50 °C	0.43	up to 60	Heavy cranes
S460M/ML	460 MPa	–20 / –50 °C	0.46	up to 50	High-rise, heavy lifting

S355ML is the best-selling grade worldwide because it offers the perfect balance of strength, low-temperature toughness, weldability, and price. Full comparison: S355M vs S355ML EN 10025-4 Steel Plate Comparison Supplier

 

Equivalent International Equivalents

Standard	Equivalent Grade	Key Notes	Typical Use Case
ASTM	A572 Gr.50 + Z35	Yield match; –50 °C KV add	U.S. offshore
JIS	SM490A	Rm 490 MPa; –40 °C KV	Japanese marine
GB/T	Q355E	Low-temp exact	China-EU projects
API 2W	Grade 50	Offshore weldable	Gulf/Baltic platforms
EN 10025-6	S355QL	QT alt; S355ML cheaper	Heavy lifts

Full equivalents: S355ML Equivalent Material EN 10025-4 Plate Supplier

 

Applications & Design Considerations

S355ML mechanical properties make it the preferred grade for:

• Offshore wind turbine foundations (monopiles, jackets)
• Arctic oil & gas platforms
• Jack-up rigs and heavy mobile cranes
• Cold-region bridges and infrastructure
• Penstocks and pressure pipelines in alpine areas

Design advantages:

• 15–20 % weight reduction vs S355J2
• Excellent fatigue resistance (S-N curve >10^7 cycles at 160 MPa)
• No preheat up to 80 mm → faster fabrication
• Z35 quality prevents lamellar tearing in critical welds

Why Choose Gangsteel for S355ML Mechanical Properties Plates

• Largest S355ML stock in Asia (5,000+ tons ready)
• Factory-direct price – 60–120 USD/ton lower than traders
• Full processing capability (cutting, beveling, drilling, rolling, priming)
• Z35 quality always in stock
• Immediate delivery worldwide
• Exported to 90+ countries with perfect documentation
• One-stop service – stock → processing → shipping

 

FAQ – Detailed Answers

Q1: What is the difference between S355ML and S355M in mechanical properties?A: The mechanical properties are identical except for impact test temperature. S355ML guarantees ≥27 J at –50 °C, S355M ≥40 J at –20 °C. Yield, tensile, elongation, hardness, density – everything else is the same. Choose S355ML when service temperature is below –20 °C.

Q2: What is the actual yield strength in thick plates?A: Gangsteel actual values are 375–420 MPa in 100–150 mm thickness, well above the minimum 295 MPa for t >120 mm.

Q3: How does S355ML compare to S355J2 in mechanical properties?A: S355ML has the same yield/tensile as S355J2 but much better low-temp toughness (–50 °C vs –20 °C) and lower CEV for better weldability. Fatigue life is 20-30 % longer.

Q4: What is the density and hardness of S355ML?A: Density 7.85 g/cm³ (7850 kg/m³), hardness 140–180 HBW (typical 150–170 HBW in Gangsteel stock).

Q5: Can S355ML be used for pressure vessels?A: Yes – PED Category III compliant. Excellent for non-cryogenic vessels; derate yield for thickness >63 mm.

Q6: What NDT do you provide with the plates?A: Standard 100 % UT EN 10160 S2/E2. S3/E3, MT, PT, RT available. All plates have full traceability.

Q7: What specifications can you supply for S355ML?A: Thickness 6–200 mm, width 1500–4200 mm, length up to 18 m. Z25/Z35, all major class approvals (DNV, ABS, LR, BV, CCS, KR), normalized optional for special requirements.

 

Contact Gangsteel Today

Need S355ML plates with verified mechanical properties? Contact us for quotation within 2 hours.

Email: admin@gangsteel.com WhatsApp/WeChat/Mobile: +86 135 9887 9167 Website: https://gangsteel.net/

Gangsteel – Real Factory. Real Stock. Real Mechanical Performance.

 

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