Weathering Hot Rolled Steel Coil – Q355NH / Corten A Grade
Product Overview
Weathering steel, commonly known as Corten steel, is a specialized low-alloy steel that develops a tight, adherent protective patina layer when exposed to outdoor weather conditions. This Q355NH / Corten A grade hot rolled coil delivers excellent atmospheric corrosion resistance, eliminating the need for paint and reducing long-term maintenance costs. It is the material of choice for shipping containers, bridges, architectural facades and outdoor structures where long-term durability and low maintenance are required.
Why Choose CNB Weathering Steel?
Our weathering hot rolled steel is produced with precise alloying of copper, chromium and phosphorus elements to ensure consistent patina formation and corrosion resistance. We source from mills specializing in weathering steel production with strict control of alloy composition and processing parameters. Every batch undergoes corrosion performance verification to ensure reliable long-term outdoor performance.
Key Specifications
| Item | Specification |
|---|---|
| Product Name | Weathering Hot Rolled Steel Coil (Corten Steel) |
| Steel Grade | Q355NH / Corten A / ASTM A242 |
| Thickness Range | 2.0mm – 12.0mm |
| Standard Widths | 1000mm, 1250mm, 1500mm, 1800mm |
| Coil Inner Diameter | 760mm |
| Coil Weight | 5MT – 25MT per coil |
| Surface Condition | Black as-rolled |
| Applicable Standards | GB/T 4171, ASTM A242, EN 10025-5 |
| Key Alloy Elements | Cu, Cr, P, Ni |
| Corrosion Mechanism | Self-forming protective patina layer |
Core Advantages
- Self-protecting patina: Forms stable rust layer that stops further corrosion, no painting required.
- Long service life: 30–50 years outdoor service life with minimal maintenance.
- Aesthetic appearance: Develops unique warm brown patina for architectural and landscape applications.
- Cost saving: Eliminates painting and repainting costs over the product lifecycle.
- Good structural performance: Maintains good strength and weldability for structural applications.
Applications
This weathering hot rolled steel is widely used for shipping containers, bridge superstructures, building facades, landscape architecture, railroad equipment, transmission towers, outdoor sculptures and industrial plant structures.
Get a Quotation
We supply weathering steel in coil, sheet and profile form in various grades and sizes. Custom cutting, forming and surface preparation services are also available. Contact our team for weathering steel recommendations and a detailed quotation for your project.
