S355JOW Weathering Steel Plate is a premium medium-tensile, low-carbon manganese weathering steel designed for structural applications where durability and resistance to atmospheric corrosion are paramount.
S355JOW Weathering Steel Plate
Compliant with the EN 10025-5 standard, this material is celebrated for its unique ability to form a protective "patina" layer when exposed to the elements, significantly reducing the need for painting and maintenance.
As a leading supplier of S355J0W structural steel, we provide plates in untreated or normalized conditions, ensuring excellent impact resistance and superior weldability for demanding engineering projects.
Key Features and Benefits of S355J0W Steel
Atmospheric Corrosion Resistance: The chemical composition of S355J0W allows it to develop a stable rust-like appearance that acts as a barrier against further oxidation.
Excellent Weldability: With a low carbon content, S355J0W is readily weldable using standard techniques, making it ideal for complex structural fabrications.
Good Impact Resistance: This grade offers reliable performance in various temperatures, ensuring structural integrity in harsh environments.
Cost-Efficient Machinability: The machinability of S355J0W is comparable to mild steel, allowing for easy cutting, drilling, and forming without specialized equipment.
Sustainability: By eliminating the need for protective coatings, S355J0W reduces long-term maintenance costs and environmental impact.
Typical Applications of S355J0W Steel
The versatility of S355J0W weathering steel plate makes it a preferred choice across various heavy industries:
Bridges: Used in highway and railway bridges for its high strength-to-weight ratio and low maintenance requirements.
Railway & Transport: Essential for rail wagons and freight containers exposed to the weather.
Architectural Applications: Widely used in building facades, outdoor sculptures, and landscape architecture for its aesthetic "corten" finish.
Offshore & Marine: Suitable for structures in coastal or offshore environments where corrosion protection is critical.
Technical Specifications and Chemical Composition of S355J0W Steel
Our S355J0W plates are manufactured to precise standards. Below is the typical chemical breakdown and Carbon Equivalent Value (CEV):
| Element | Ni | Cr | Mo | Si | Mn | Cu | C | S | P | CEV* |
| Min (%) | - | 0.40 | - | - | 0.50 | 0.25 | - | - | - | - |
| Max (%) | 0.009 | 0.80 | - | 0.55 | 1.60 | 0.55 | 0.22 | 0.030 | 0.030 | 0.52 |
*Note: CEV values may vary based on section thickness and specific grade variations.
Available Sizes and Custom Solutions of S355J0W Steel
We offer S355J0W weathering steel in a wide range of thicknesses and dimensions:
Product Form: Heavy Plate, Hot Rolled Plate.
Lab-Certified Materials: All plates come with full traceability and certification to ensure quality compliance.
Non-Standard Sizes: Reduce wastage and optimize your budget by ordering custom-cut sizes. Speak to our account managers about the cost-savings benefits of our bespoke processing services.
| Service Category | Details & Specifications | Client Benefits |
| Lead Time (Delivery) | • In-Stock: 3 – 7 working days for standard sizes.<br>• Custom Production: 20 – 45 days for non-standard sizes or lab-certified requirements. | Rapid response for urgent bridge or architectural projects. |
| Shipping & Logistics | • Global Reach: Sea freight (FCL/LCL), Rail transport, and Bulk carriers.<br>• Loading Ports: Major ports including Shanghai, Tianjin, or Qingdao.<br>• Packaging: Standard export sea-worthy packing (bundles, steel strips, or customized pallets). | Secure transit and optimized freight costs to any global destination. |
| Payment Terms | • T/T (Telegraphic Transfer): 30% deposit, balance against BOL copy.<br>• L/C (Letter of Credit): Irrevocable L/C at sight for large-scale contracts.<br>• Open Account: Credit terms available for long-term strategic partners. | Flexible financial solutions to support project cash flow. |
| Documentation | • Certification: Mill Test Certificate (MTC) according to EN 10204 3.1 / 3.2.<br>• Tracing: Full heat number traceability and third-party inspection (SGS, BV) supported. | Guaranteed compliance with international engineering standards. |
| Bespoke Services | • Processing: CNC Cutting, Drilling, Bending, and Surface Pre-treatment (Sandblasting).<br>• Sizing: Non-standard width and length available to reduce material wastage. | Reduced on-site labor and lower total project cost. |
Equivalent Grades of S355J0W Steel
If your project requires higher impact energy or different thickness specifications, consider these weathering steel substitutes:
- S355J2W Weathering Steel Plate: Offers improved impact testing at lower temperatures (-20°C).
- S355K2W Weathering Steel Plate: Designed for even more rigorous impact requirements (-40°C).
As a specialist in weathering steel supply, we understand the nuances of the S355J0W grade. Whether you are looking for a single plate for an architectural project or bulk supply for bridge construction, we provide lab-certified materials that meet international standards.
Contact our sales team today for a quote on S355J0W Weathering Steel Plates.
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What is the American equivalent of S355J0?
ASTM A572 Grade 50: This is a common equivalent to S355J0 in terms of mechanical properties and usage in construction and structural applications. ASTM A36: While A36 has lower mechanical properties than S355J0, it can sometimes be used as an equivalent in less demanding applications.
What grade of steel is S355J0?
S355J0 is a non-alloy structural steel grade defined by the EN 10025-2 standard. The "S" denotes "structural," indicating its use in constructing buildings, machinery, or infrastructure.
Can S355 be hardened?
S355 is not ideally suited to hardening, though it can be subjected to limited heat treatment process such as case hardening. When hardening S355 heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each component.
Can S355 be welded?
S355 structural steel, widely used in offshore, shipbuild- ing, and construction industries, is known for its excellent weld- ability and durability [1], as well as for its corrosion and fatigue characteristics.
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