EN 10025 S355J2W Corten Steel Plates
S355J2W belongs to fine grain steel, S355J2W is an improved atmospheric corrosion-resistant structural steel, S355J2W is used in large quantities for high speed rail bogies, welded, bolted and riveted components, S355J2W enhances the resistance to atmospheric corrosion applied to ambient temperatures, in order to achieve the corrosion-resistant properties of the addition of certain specific alloying elements, such as: P, Cu, Cr, Ni, Mo and so on, in a variety of climatic conditions to form a protective oxidizing layer on the surface of the metal.
| Grade : | S355J2W(+N) | |
| Number: | 1.8963 | |
| Classification: | Alloy special steel | |
| Standard: |
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EN 10025 S355J2W atmospheric corrosion resistant steel plate chemical composition
| C | Si | Mn | P | S | Cr | Cu | CEV |
| max 0.16 | max 0.5 | 0.5 - 1.5 | max 0.03 | max 0.03 | 0.4 - 0.8 | 0.25 - 0.55 | max 0.52 |
EN 10025 S355J2W weather resistant steel sheet mechanical property
| Nominal thickness (mm): | to 3 | 3 - 100 | 100 - 150 |
| Rm - Tensile strength (MPa) | 510-680 | 470-630 | 450-600 |
| Nominal thickness (mm): | to 16 | 16 - 40 | 40 - 63 | 63 - 80 | 80 - 100 | 100 - 150 |
| ReH - Minimum yield strength (MPa) | 355 | 345 | 335 | 325 | 315 | 295 |
| KV - Impact energy (J) longitud., | -20° 27 |
0° 27 |
| Nominal thickness (mm): | 1.5 - 2 | 2 - 2.5 | 2.5 - 3 |
| A - Min. elongation Lo = 80 mm (%) | 16 | 17 | 18 |
| Nominal thickness (mm): | 3 - 40 | 40 - 63 | 63 - 100 | 100 - 150 |
| A - Min. elongation Lo = 5,65 √ So (%) | 22 | 21 | 20 | 18 |
EN10025 S355J2W weathered steel plate Products Details
S355J2W specifications ≤ 16; yield strength (MPa) ≥ 355; tensile strength (MPa) 510-680; elongation A (%) ≥ 22;
S355J2W specifications 16-40; yield strength (MPa) ≥ 345; tensile strength (MPa) 470-630; elongation A (%) ≥ 22;
S355J2W specifications 41-63; yield strength (MPa) ≥ 335; tensile strength (MPa) 470-630; elongation A (%) ≥ 22;
S355J2W specifications 63-80; yield strength (MPa) ≥ 325; tensile strength (MPa) 470-630; elongation A (%) ≥ 18;
S355J2W specifications 80-100; yield strength (MPa) ≥ 315; tensile strength (MPa) 470-630; elongation A (%) ≥ 18;
S355J2W specifications 100-150; yield strength (MPa) ≥ 295; tensile strength (MPa) 450-600; elongation A (%) ≥ 18.
S355J2W Weathering Steel – Frequently Asked Questions
1. What is S355J2W and what standard does it follow?
S355J2W is a weather-resistant structural steel defined in EN 10155(standard for structural steels with improved atmospheric corrosion resistance).
S: Structural steel
355: Minimum yield strength ≥ 355 MPa
J2: Impact energy ≥ 27 J at -20°C
W: Weathering (improved corrosion resistance)
It combines high strength, low-temperature toughness, and long-term anti-corrosion performance.
2. What is the difference between S355J2W and regular S355J2?
S355J2: General structural steel, good low-temperature toughness,but no special corrosion resistance.
S355J2W: Added alloy elements (Cu, P, Cr, Ni) to form a stable protective oxide layerthat slows down atmospheric corrosion significantly.
Both have the same strength and -20°C impact toughness,but S355J2W has much longer service life outdoors and in corrosive environments.
3. How does S355J2W achieve corrosion resistance?
S355J2W forms a dense, tight, self-passivating rust layer on the surfaceafter long-term exposure to air and moisture.
This layer:
Prevents further oxygen and moisture penetration
Stops deep corrosion and pitting
Allows maintenance-free, unpainted outdoor use
Its corrosion resistance is 3–8 times higher than ordinary carbon steel.
4. Will S355J2W rust and stain surrounding structures?
In the early stage (6–12 months), surface oxidation will appear.After the stable patina forms, rust running and staining will be greatly reduced.
For architectural and bridge projects, we can provide:
Surface pre‑rusting treatment
Guidance to achieve uniform color and avoid pollution
5. Is S355J2W suitable for low-temperature countries?
Yes.J2 means guaranteed impact energy ≥27 J at -20°C,so S355J2W is widely used in:
Northern Europe
Canada
Russia
Other cold and sub‑zero regions
It is ideal for outdoor structures, bridges, towers, and offshore non-submerged parts.
6. How is the weldability of S355J2W?
S355J2W has good weldability:
Low cold-cracking tendency
Moderate preheating is enough for thick plates
Welded joints maintain good toughness and corrosion resistance
It is friendly to on-site construction and reduces welding costs.
7. Can S355J2W be used offshore or in coastal areas?
Yes, but with limits:
Suitable for above-water structures: offshore platforms, decks, support frames, wind towers, coastal bridges.
Not recommended for parts permanently submerged in seawater or in high‑chloride immersion.
It performs very well against salt spray and marine atmosphere.
8. Do I need to paint S355J2W?
In most cases: No painting required.Major advantages:
No coating, no repainting
Greatly reduces maintenance cost
Longer service life
Natural industrial appearance
Painting is optional for aesthetic or special project requirements.
9. What documents and certifications do you provide?
We supply:
Mill Test Certificate (MTC) according to EN 10155
Chemical composition & mechanical property report
Third-party inspection support: SGS, BV, TÜV
Full documentation for customs clearance and project acceptance
10. What are the typical applications of S355J2W?
Bridges, highway guardrails, steel structures
Architectural buildings, landscape steel structures
Wind turbine towers, offshore platform upper structures
Outdoor equipment, mining machinery, transmission towers
Facilities in cold regions and coastal areas
11. What are the biggest pain points you solve for clients?
Avoiding fake weathering steel that fails quickly.
Ensuring -20°C toughness for cold-region projects.
Reducing lifetime maintenance and painting cost.
Stable quality to pass European & international inspection.
Good weldability to lower on-site construction difficulty.
What material is S355J2W?
S355J2W is a weathering steel grade that belongs to the European standard EN 10025-5. S355j2w steel sheet offers enhanced atmospheric corrosion resistance. The steel undergoes a hot rolling process, followed by cooling and then it is cut to the desired length.
What is S355j2w equivalent to?
| EU EN |
USA - |
Germany DIN,WNr |
Japan JIS |
France AFNOR |
England BS |
Canada HG |
European old EN |
Italy UNI |
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| S355J2W(+N) (1.8963) |
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S355j2w N Equivalent Indian Standard
it is an Indian specification whose steel no is 1.8963. Its DIN, WNr specification is the WTSt 52-3 with USX CORP proprietary, of COR-TEN B ®. The European standard for this grade is S355J2G2W with JIS SMA50CP and BS WR50C.
What is s355j2w+n plate ? where it is used?
S355J2W+N is a specialized weathering steel grade with an addition of nickel (N) in its chemical composition. EN 10025 5 s355j2w n plate shows improved weathering properties compared to standard S355J2W.
Thus, it is preferred for outdoor structures that are subjected to harsh environmental conditions.
S355J2W+N plate forms a protective patina on its surface which reduces the need for maintenance and painting.
Weathering steel S355J2W+N plate can be used in bridges, facades, containers, railway vehicles and structural components. Their properties like weathering resistance and high strength enhance their longevity and performance.
What is equivalent to S355J2 material?
The equivalent of S355J2 EN 10025-2 is ASTM A572 Grade 50, DIN ST52-3, JIS SM490YA, and GB Q355D, with similar high strength and low-temperature toughness for structural use. GNEE steel's high-quality plates ensure compliance for your projects. For more, explore our BS EN 10025-2 material grade guide.
S355j2w+n VS S355j2+n
S355J2W+N strips material is a weathering steel grade with enhanced atmospheric corrosion resistance due to the addition of Ni. It is specifically used in outdoor applications that are exposed to harsh weather conditions.
S355J2+N is a non alloy structural steel grade used for general structural purposes. It has lower level of corrosion resistance compared to S355J2W+N coils.
Is S355J2W the same as Corten B steel?
Yes, practically speaking. Corten B is a well-known proprietary trademark, while S355J2W is the official European standard (EN 10025-5) for structural weathering steel.
Both grades share almost identical chemical compositions (rich in Copper, Chromium, and Nickel) and offer the same 355 MPa minimum yield strength and excellent atmospheric corrosion resistance. If your engineering drawings specify Corten B, you can confidently use our S355J2W as a fully certified, globally recognized equivalent.
Why does the plate look black/grey instead of rusty? How long does it take to form the orange/brown patina?
By default, our S355J2W plates are delivered in the 'as-rolled' condition, meaning they have a dark grey mill scale on the surface, just like normal steel. The protective, rust-like patina naturally forms over 6 to 18 months when exposed to alternating wet and dry weather conditions outdoors.
Value-Added Service: If your architectural project requires the immediate aesthetic 'rusty' look, we also provide pre-rusting surface treatments (accelerated weathering) in our processing center before shipment.
Can we weld S355J2W using standard mild steel welding electrodes?
While S355J2W is highly weldable, we strongly advise against using standard mild steel consumables.
To ensure the weld seam has the same atmospheric corrosion resistance and eventually matches the color of the weathered plate, you must use weathering-grade welding consumables (such as ER80S-G or equivalent wires containing Cu and Ni). Using standard wires will cause the weld joints to corrode much faster than the plate itself, compromising structural safety. We can supply the matching welding wire along with your steel plate order.
My project is in a cold region. How do you guarantee the low-temperature toughness of S355J2W?
The 'J2' designation explicitly guarantees superior performance in sub-zero environments. During production, we strictly perform the Charpy V-Notch impact test at -20°C (guaranteeing ≥ 27 Joules). Furthermore, the carefully controlled addition of Nickel (Ni) in our S355J2W chemistry significantly enhances its resistance to brittle fracture in cold climates. All test values are fully documented in the EN 10204 3.1 MTC.
The lead time for fresh rolled S355J2W is too long for our project schedule. Do you have a faster or more cost-effective alternative?
Yes, absolutely. If your project timelines are tight and the engineering team approves equivalent standards, we highly recommend the Chinese equivalent grade: Q355NHD (NH stands for Weathering, D stands for -20°C impact test).
Q355NHD provides the exact same yield strength, low-temperature toughness, and weather resistance index as S355J2W. More importantly, we maintain huge ready stocks of Q355NHD in Chinese ports, allowing us to load your cargo within 7-10 days at a highly competitive price point compared to European mill schedules.
One-Stop Weathering Steel Fabrication Services
Our Core Processing Capabilities
Precision Laser Cutting & Hollow Carving
Using high-power CNC laser and plasma machines, we can cut complex geometric patterns, decorative screens, and custom profiles according to your CAD/DWG files with millimeter precision and clean edges.
Bending, Drilling & Welding
From heavy-duty structural drilling to precise angle folding and full-penetration welding, our in-house engineers prepare the plates exactly as your project demands, saving your local fabricators days of work.
Accelerated Pre-Weathering / Rapid Rusting
Can't wait 6 to 12 months for nature to do its job? We utilize eco-friendly chemical treatments to instantly generate that beautiful, rich orange-brown rust patina in our factory. Your steel arrives looking perfectly aged on day one.
Rust Sealing & Surface Curing
Are you worried about rust stains bleeding onto your concrete or marble floors? We apply a specialized transparent curing sealer to lock in the rust layer. This stops the rust from transferring or washing off in the rain, ensuring a clean and maintenance-free architectural finish.
Got a project in mind? Send us your blueprints or CAD drawings (PDF/DWG/DXF). Our engineering team will review your design and provide a competitive quote including material and fabrication costs within 24 hours!
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We have professional staff to provide detailed responses to your orders. If you have any questions about EN 10025 S355J2W Corten Steel Plates, please contact me.
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