Aluminized Steel Type 2
Aluminized Steel Type 2 is designed primarily for corrosion protection rather than extreme heat resistance. Its nearly pure aluminum coating offers excellent weatherability, long service life, and strong resistance to atmospheric corrosion. These characteristics make it an ideal choice for construction, agricultural, and industrial applications requiring durable and low-maintenance steel products.
- Description
Description
Aluminized Steel Type 2 is a carbon steel product coated with commercially pure aluminum through a hot-dip process. Unlike Type 1, which contains an aluminum-silicon alloy coating, this grade uses nearly pure aluminum to provide superior atmospheric corrosion resistance. It is widely used in construction, storage equipment, agricultural facilities, and outdoor structures where long-term durability is required.
Coating Composition
The coating of Aluminized Steel Type 2 mainly consists of aluminum with minimal alloying elements.
| Element | Typical Content (%) |
|---|---|
| Aluminum (Al) | ≥99 |
| Silicon (Si) | Trace |
| Iron (Fe) | Small amount from diffusion layer |
The high-purity aluminum coating forms a dense oxide film on the surface, protecting the steel substrate from corrosion and weather exposure.
Mechanical Properties
Mechanical properties are determined primarily by the base steel rather than the aluminum coating.
| Property | Typical Value |
| Tensile Strength | 270–450 MPa |
| Yield Strength | 140–300 MPa |
| Elongation | 20–40% |
| Hardness | 55–85 HRB |
The material maintains good formability and can be processed through bending, roll forming, stamping, and welding.
Key Performance Characteristics
Outstanding Corrosion Resistance
The pure aluminum coating provides excellent protection against moisture, oxidation, and industrial atmospheres. This makes the material suitable for outdoor applications and environments exposed to humidity.
Long Service Life
A stable aluminum oxide layer continuously protects the surface from further corrosion, helping extend the lifespan of structures and fabricated components.
Good Weather Resistance
The coating performs well under long-term exposure to rain, sunlight, and temperature fluctuations. It maintains surface integrity better than ordinary carbon steel.
Excellent Heat Reflectivity
The bright aluminum surface reflects radiant heat efficiently, helping reduce heat absorption in buildings and industrial equipment.
Typical Applications
Aluminized Steel Type 2 is commonly used in:
- Roofing and wall panels
- Grain silos and storage tanks
- Agricultural buildings
- HVAC equipment
- Industrial ventilation systems
- Electrical cabinets
- Outdoor enclosures
- Construction components
- Solar equipment supports
- Corrosion-resistant structural parts
Type 1 vs. Type 2 Comparison
| Property | Type 1 | Type 2 |
| Coating | Aluminum-Silicon Alloy | Pure Aluminum |
| Heat Resistance | Excellent | Good |
| Corrosion Resistance | Very Good | Excellent |
| Oxidation Resistance | Excellent | Very Good |
| Exhaust System Use | Common | Rare |
| Building Applications | Limited | Common |
