S355J2WP Weathered Steel Plate

S355J2WP weathered steel plate

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S355J2WP corten structural steel is the implementation of the European standard EN10025 standard production of weathering steel, its production thickness of less than 100mm, delivered in hot rolled condition, S355J2WP corten sheet has a high fatigue resistance and atmospheric corrosion resistance.

 

The S355J2WP corten steel sheet we offer can be customised in size, cutting, welding, punching and other processing services according to your end-use requirements of S355J2WP corten steel sheet metal products.

 

Technical Specifications & Chemical Composition

Feature	Specification
Standard	EN 10025-5:2004
Yield Strength	Min. 355 MPa
Tensile Strength	470 - 630 MPa
Impact Test	-20°C V-Notch (≥ 27 Joules)
Available Thickness	1.5mm - 20mm (Stocked)
Delivery Condition	Hot Rolled (AR) / Normalized (+N)
Certification	EN 10204 3.1 MTC (Provided before shipment)

 

C	Si	Mn	P	S	Cr	Cu	CEV
max 0.12	max 0.75	max 1	0.06 - 0.15	max 0.03	0.3 - 1.25	0.25 - 0.55	max 0.52

 

 

	Minimum yield strength Reh MPa		Tensile strength Rm MPa		Minimum elongation - A Lo = 80 mm			Minimum elongation - A Lo = 5,65 * √So (%)
Steel grade	Nominal thickness mm		Nominal thickness mm		Nominal thickness mm
	≤16	>16 ≤40	≤3	>3 ≤100	>1,5 ≤2	>2 ≤2,5	>2,5 ≤3	>3 ≤40
S355J2WP	355	345	510-680	470-630	16	17	18	22

 

S355J2WP vs. S355J2W: What's the Difference?

This is the most frequently asked question by engineers and architects. Here is our expert guide:

 

• S355J2WP (Corten A Equivalent): Contains high Phosphorus (P: 0.06 - 0.15%). The added phosphorus significantly accelerates the rusting process and enhances the weather-resistance index. It is highly recommended for thinner plates (usually ≤ 12mm) and aesthetic applications like architectural facades and decorative screens.

 

• S355J2W (Corten B Equivalent): Contains lower Phosphorus. It is designed for heavily loaded structures and thicker plates (up to 150mm). It offers better weldability for thick sections and is widely used for heavy bridges and load-bearing infrastructure.

 

Is the European S355J2WP stretching your project budget? Or is the mill lead time too long?

We highly recommend the Chinese equivalent weathering grade: SPA-H (for coils/thin sheets) or Q355NH. They offer the exact same yield strength and weathering performance as S355J2WP but are available in massive ready stocks at our Chinese ports. We can load your cargo within 7 days at a highly competitive price point!

 

Q: What standard does S355J2WP conform to?

A: S355J2WP is manufactured strictly to EN 10025-5 (material number 1.8965), fully compliant with European weathering steel specifications.

 

Q: What certification documents are provided?

A: We supply official EN 10204 3.1/3.2 MTC, and CE certification is available upon request; full traceability for heat and batch numbers is guaranteed.

 

Q: What is the key difference between S355J2W and S355J2WP?

A: S355J2WP features optimized anti-corrosion composition and enhanced surface quality, delivering more stable weathering performance for long-term outdoor use.

 

Q: Can you guarantee -20℃ impact toughness?

A: Yes, J2 grade ensures minimum 27J impact energy at -20℃, with certified test reports to support structural safety in cold climates.

 

Q: Can S355J2WP achieve 50–100 years of maintenance-free service?

A: Yes, its dense, stable protective rust layer delivers 3–8x higher corrosion resistance than carbon steel, enabling long-term coating-free operation.

 

Q: Is UT ultrasonic testing available for thick plates (>30mm)?

A: We provide UT testing per EN 10160 to detect internal laminations/cracks, ensuring zero defects for load-bearing structures.

 

Q: What welding wire do you recommend for matching corrosion resistance?

A: We suggest weathering-grade copper-nickel welding wires, ensuring welds and base metal share consistent longevity and appearance.

 

Q: Will your documentation pass strict project inspections?

A: Full EN 10204 3.1/3.2 certificates and test reports are included, supporting smooth approval by supervisors and third-party inspectors.

 

Q: Do you accept small-batch/cut-to-length orders?

A: We maintain full-spec inventory, supporting low-MOA orders and custom cutting for small landscape projects with no material waste.

 

Q: Can you process complex CAD patterns and hollow carving?

A: CNC laser cutting is available for any custom design, delivering precise decorative panels, sculptures and landscape components.

 

Q: How fast can you deliver standard and custom orders?

A: Stock items ship within 7 DAYS; custom-fabricated parts are delivered in 10 days to meet tight project deadlines.

 

Q: How to avoid early flaking rust ruining landscape aesthetics?

A: Optional pre-weathering treatment stabilizes the rust layer upfront, preventing loose rust and maintaining a clean finish.

 

Q: Is S355J2WP suitable for harsh corrosive environments (seawater, coal slag)?

A: Optimized Cu-Cr-Ni alloy composition delivers superior resistance to acidic, abrasive and marine corrosion, avoiding early rust perforation.

 

Q: Can you control thickness tolerance for lightweight production?

A: Precision tolerance control and consistent flatness optimize weight reduction and compatibility with automated fabrication lines.

 

Q: Do you guarantee stable bulk supply?

A: Long-term mill partnerships ensure reliable large-volume supply with competitive pricing and minimal price fluctuations.

 

Q: Are there cost-effective alternatives to S355J2WP?

A: Q355NHD and SPA-H equivalent grades are available, offering matching performance while reducing procurement costs by up to 15%.

 

 

 

 

 

 

 

 

 

We have excellent after-sales service. If you have any questions about S355J2WP weathered steel plate, you can contact us and we will reply you within two hours.

 

GNEE STEEL: Advanced Metal Fabrication & Processing Center

GNEE STEEL is fully equipped with state-of-the-art processing machinery, including a 400-ton 5-meter CNC press brake (bending machine), a 6-meter shearing machine, a 2.2-meter plate rolling machine, CO2 gas-shielded welders (MIG/MAG), Argon arc welders (TIG), electric arc welders, polishing machines, waterjet cutting machines, CNC plasma cutting machines, laser cutting machines, and CNC punching machines.

 

We are capable of shearing, bending, punching, polishing, V-grooving, and welding materials of varying thicknesses, including weathering steel (Corten), stainless steel, copper, aluminum, and galvanized plates. We can expertly fabricate these materials into your ideal finished products strictly according to your blueprints.

 

【 Machining & Fabrication Capabilities 】

We provide precision cutting and blanking services for various thicknesses of stainless steel, weathering steel, carbon steel (iron), aluminum, copper, and galvanized plates. Our specific capabilities include:

• Shearing / Cutting: Thickness capacity of 0.5mm – 40mm.
• CNC Bending / Folding: Thickness capacity of 0.5mm – 25mm.
• Plate Rolling / Rounding: Thickness capacity of 1mm – 16mm.
• Other Services: Punching, polishing, welding, and custom fabrication based on client drawings.

 

"Metal Products Fabrication Series"

• Sheet Metal Processing: Slitting, cut-to-size sectioning, bending, custom piece-cutting, waterstop steel plates, punched embedded parts (embedment plates), checkered plate stair treads, cable brackets, and building reinforcement components.
• Custom Profiles: We can customize and manufacture non-standard L, Z, C, and H-shaped steel sections.
• Tube & Profile Processing: We offer precision cutting, punching, and welding for various thicknesses of round pipes, square tubes, channel steel, I-beams, angle steel, H-beams, rectangular tubes, welded pipes, galvanized pipes, and hot/cold-rolled plates.

 

【 Contracting Services 】

• "Custom Weathering Steel Fabrication & Installation Projects"
• Supply & Cutting: Wholesale and retail of custom-cut weathering steel plates (Corten steel, rusted steel plates, red rust plates).
• Pre-Weathering Treatment: We offer accelerated surface rusting treatments to achieve specific architectural colors, such as dark red rust or rusty yellow.
• Finished Corten Components: We manufacture custom rusted steel finished products based on client CAD drawings. Our one-stop services include laser cutting (hollow carving and etching/engraving), bending, drilling, structural welding, and installation engineering.

 

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