Q415NH Weathering Steel Plate is a high-tensile strength structural steel under the China GB/T 4171 standard, featuring excellent atmospheric corrosion resistance and superior mechanical properties.
It develops a stable protective rust layer after exposure to the atmosphere, reducing the need for painting or maintenance, and extending the service life of the structure.
Specifications
Grade: Q415NH
Standard: GB/T 4171
Thickness: 1mm – 300mm
Width: 1000mm – 4500mm
Length: 3000mm – 20000mm
Heat Treatment: AR (As Rolled), N (Normalized), TMCP, Q+T (Quenched + Tempered)
Delivery Condition: As rolled / Normalised / TMCP
Chemical Composition (%)
| Element | Max / Range |
|---|---|
| C | ≤ 0.12 |
| Si | ≤ 0.65 |
| Mn | ≤ 1.10 |
| P | ≤ 0.025 |
| S | ≤ 0.030 |
| Cu | 0.20 – 0.55 |
| Ni | 0.12 – 0.65 |
| Cr | 0.30 – 1.25 |
Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (≤16mm) | ≥ 415 MPa |
| Yield Strength (General) | 395 – 415 MPa |
| Tensile Strength | 520 – 680 MPa |
| Elongation (Min) | ≥ 20% |
Key Features & Advantages
Excellent Corrosion Resistance – Forms a protective oxide layer against atmospheric corrosion.
High Strength – Yield strength above 415 MPa, ideal for heavy-duty structural use.
Low Maintenance – Reduced need for painting due to natural rust protection.
Versatile Applications – Suitable for various structural and container manufacturing projects.
Reliable Quality – Supplied from top Chinese mills with heat number & batch number tracking.
Flexible Supply – Custom cutting, surface treatment, and third-party inspection available.
Available Additional Services
UT – Ultrasonic Examination
Z-direction Tests – Z15, Z25, Z35
Impact Tests – Charpy V-Notch
HIC & NACE0175 Testing
NDT – Non-destructive Testing
PWHT – Post Weld Heat Treatment Simulation
Surface Treatment – Shot blasting, painting, coating
Third-party inspection – SGS, BV, LR
Why Choose Us for Q415NH Weathering Steel Plate
Best Quality – Direct from first-class Chinese mills, traceable heat & batch numbers.
Fast Delivery – Strong supply chain & mill partnerships.
Professional Service – Over 17 years export experience in corten steel plate supply.
Competitive Price – Flexible pricing with multiple mill sources.
Multiple Payment Terms – T/T, L/C at sight, Usance L/C.
Gnee operates a state-of-the-art manufacturing plant covering over 20,000 square meters, equipped with cutting-edge machinery and streamlined production lines.
We focus on both efficiency and precision, ensuring top-quality output at every stage.
Our Key Equipment Includes:
CNC plasma & laser cutting machines
Large-scale bending, stamping, and integrated welding systems
Fully automated sandblasting and coating lines
In-house testing labs for strength and corrosion resistance
Spacious, professional office spaces
At Gnee, we integrate modern plant management and smart manufacturing to deliver efficient and reliable steel solutions worldwide.
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