Weathering steel, plate

Weathering Steel ND (09CrCuSb) is a low-alloy weathering steel widely used in bridges, vehicle manufacturing, outdoor facilities, and other fields. It is supplied mainly as hot-rolled plates, hot-rolled section steel (including angle steel, channel steel, I-beam, etc.) with diverse specifications.

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Product Details

Product Details: Weathering Steel ND (09CrCuSb)

1. Basic Information

Plate Thickness: Generally 4 - 100mm

Plate Width: 1000 - 3000mm (Length customizable per customer demand)

Density: Approx. 7.85g/cm³ (Facilitates weight calculation and cost accounting in design and production)

2. Chemical Composition

The chemical composition of Weathering Steel ND (09CrCuSb) is as follows:

Element	Content Range
Carbon (C)	≤0.12%
Silicon (Si)	0.25 - 0.75%
Manganese (Mn)	0.20 - 0.50%
Phosphorus (P)	0.07 - 0.15%
Sulfur (S)	≤0.035%
Chromium (Cr)	0.25 - 0.50%
Nickel (Ni)	≤0.30%
Copper (Cu)	0.25 - 0.50%
Antimony (Sb)	0.02 - 0.10%

3. Processing Performance

Weathering Steel ND (09CrCuSb) exhibits good processability, adapting to various processing techniques:

Machinability: Stable cutting performance. Although cutting resistance is slightly higher than ordinary steel, tool wear remains within a reasonable range. Ensures surface finish and dimensional accuracy, suitable for structural parts requiring moderate precision.

Hot Workability: Good plasticity during hot working. Wide forging and hot rolling temperature ranges improve the microstructure and comprehensive mechanical properties, allowing complex shapes to be formed.

Weldability: Excellent welding performance. Reliable joints can be achieved with suitable processes and materials. Preheating is typically required based on thickness and environment; post-weld heat treatment can eliminate stress and enhance crack/corrosion resistance.

4. Features & Advantages

Superior Atmospheric Corrosion Resistance: Forms a stable protective layer naturally, effectively resisting rain, moisture, and salt erosion, significantly reducing anti-corrosion coating and maintenance costs.

Excellent Mechanical Properties: Strength and toughness meet requirements for various engineering structures.

Formability: Meets common processing demands, allowing fabrication into various shapes.

Cost-Effective: More reasonable pricing compared to some imported weathering steels, offering high cost-performance and reduced project costs while ensuring quality.

Aesthetic Value: Unique rust-like appearance provides decorative effects for outdoor facilities.

5. Application Scenarios

Bridge Engineering: Steel beams, bridge decks, and other critical structural components.

Vehicle Manufacturing: Railway freight cars, shipping containers (enhances service life and appearance).

Outdoor Facilities: Landscape sculptures, outdoor railings, billboard brackets (functional with decorative rust appearance).

Other Fields: Building structures, port machinery, etc.

6. Production Process

Smelting: Advanced converter or electric furnace smelting with precise control of raw material ratio, temperature, and composition.

Refining: LF refining and VD vacuum degassing to remove impurities, gases, and harmful elements, ensuring high purity.

Casting: Continuous casting into slabs or billets.

Rolling: Hot rolling with controlled temperature, reduction, and speed to achieve required dimensions. Cold rolling or straightening for high-precision/cold-rolled products.

Heat Treatment: Normalizing (or others) per customer demand to optimize mechanical properties.

Surface Protection: Optional weather-resistant coating application to further enhance corrosion resistance and appearance.