S355 Material EN 10025-4 High Strength Plate Supplier

S355 Material EN 10025-4 High Strength Plate Supplier

Gangsteel – China's Leading Mill-Direct Supplier & Exporter of S355 Material EN 10025-4 High Strength Plates

Gangsteel is the most trusted supplier for S355 material EN 10025-4 high strength plates, with the largest permanent stock in Asia – over 12,000 tons of S355M and S355ML combined, thickness 6–200 mm, width 1500–4200 mm, length up to 18 meters. All plates are genuine TMCP (thermomechanical controlled process) produced by top Chinese mills (HBIS, Shougang, Nanjing Steel) with full European approvals (PED 2014/68/EU, CPR 305/2011).

We supply with original EN 10204-3.1/3.2 certificates and third-party inspection (DNV-GL, ABS, LR, BV, CCS, KR, TÜV, SGS). Z25/Z35 through-thickness quality in stock, 100 % ultrasonic testing EN 10160 S2/E2 standard.

Immediate delivery worldwide in 3–7 days. Full processing services: plasma/oxy cutting, beveling, drilling, rolling, priming.

Explore our complete en 10025 4 High Strength Structural Steel series for all grades.

What is S355 Material EN 10025-4 High Strength Plate?

“S355 material” in EN 10025-4 refers to the S355M and S355ML grades – the two high-strength, fine-grain structural steels delivered in the thermomechanical rolled (TMCP) condition.

• S355M→ standard temperature version (impact ≥40 J at –20 °C)
• S355ML→ low-temperature version (impact ≥27 J at –50 °C)

Both grades have:

• Minimum yield strength 355 MPa
• Tensile strength 470–630 MPa
• Very low CEV ≤ 0.39 → excellent weldability (no preheat up to 80 mm)
• Fine grain structure from TMCP process

S355 material EN 10025-4 is the modern replacement for older normalized grades (S355N/NL in EN 10025-3) and the direct competitor to S355J2 (EN 10025-2). It is now the dominant high-strength structural steel worldwide, especially in offshore wind, Arctic oil & gas, heavy cranes, and cold-region infrastructure.

For detailed grade designation, see S355ML Meaning EN 10025-4 Structural Steel Supplier.

Chemical Composition – Identical for S355M and S355ML

Typical Gangsteel actual values: C 0.09–0.12 %, CEV 0.34–0.37 → excellent weldability without preheating up to 80 mm thickness.

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

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

*Gangsteel guarantees 295 MPa up to 180 mm, 285 MPa to 200 mm.

Hardness: 140–180 HBW Density: 7.85 g/cm³

Full mechanical tables: S355ML Mechanical Properties EN 10025-4 Plate Supplier

Available Specifications & Testing

• Thickness: 6–200 mm (20–120 mm most popular in stock)
• Width: 1500–4200 mm
• Length: up to 18 000 mm
• Z-quality: Z25 standard, Z35 large stock
• NDT: 100 % ultrasonic testing EN 10160 S2/E2 (S3/E3 optional)
• Surface: shot-blasted + primer or mill finish
• Certification: EN 10204-3.1/3.2, PED, CPR, all major class approvals

Applications of S355 Material EN 10025-4 High Strength Plates

S355M and S355ML are the most widely used high-strength structural steels worldwide:

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

When the temperature drops below –20 °C, S355ML is required.

Why Choose Gangsteel for S355 Material EN 10025-4 Plates

• Largest S355M/S355ML stock in Asia (12,000+ tons combined)
• 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 S355M and S355ML?

A: The only difference is the impact test temperature. S355M is tested at –20 °C with minimum 40 J (longitudinal), while S355ML is tested at –50 °C with minimum 27 J. Yield strength, tensile strength, elongation, chemical composition, and weldability are exactly the same. Choose S355M when service temperature is above –20 °C; choose S355ML when below –20 °C.

Q2: Is preheating required when welding S355 material?

A: No preheating is required up to 80 mm thickness thanks to the very low CEV (typically 0.34–0.37 actual). For thicknesses over 80 mm or highly restrained joints, a modest preheat of 75–100 °C is sufficient. This is a major advantage over many other structural steels.

Q3: Do you have Z35 quality in stock for S355 material?

A: Yes – we keep very large stock of both S355M + Z35 and S355ML + Z35 (reduction of area ≥35 % per EN 10164 Class 3), especially in 20–120 mm thickness, ready for immediate delivery.

Q4: What is the density and hardness of S355 material?

A: Density is 7.85 g/cm³ (7850 kg/m³), hardness is 140–180 HBW (typical 150–170 HBW in our stock). These values are consistent across the entire thickness range.

Q5: What NDT do you provide as standard?

A: 100 % ultrasonic testing to EN 10160 S2/E2 is included with every plate. We can upgrade to S3/E3, magnetic particle (MT), or penetrant testing (PT) on request at no extra charge for reasonable quantities.

Q6: What is the maximum thickness you can supply for S355 material?

A: Up to 200 mm with full properties and certification. We guarantee minimum yield of 295 MPa up to 180 mm and 285 MPa to 200 mm – significantly better than the standard requirement.

Q7: How fast can you deliver to Europe or USA?

A: From ready stock: 7–12 days to Rotterdam, Antwerp, Houston, or Los Angeles. We have regular consolidation containers and can offer air freight for urgent small quantities (<10 tons) in 48–72 hours.

Contact Gangsteel Today

Need S355 material EN 10025-4 plates? Contact us now for best price and fastest delivery.

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

Gangsteel – Real Factory. Real Stock. Real Fast Delivery.