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Alusi Steel
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Alusi Steel (Aluminum-Silicon Coated Steel) is a steel product coated with an aluminum-silicon alloy through a hot-dip process. It combines the strength of carbon steel with the excellent heat resistance and corrosion resistance of aluminum. Alusi steel is widely used in automotive exhaust systems, industrial furnaces, heat shields, ventilation systems, and construction applications.
Common Alusi Steel Grades
The most widely used grades are based on the substrate steel and coating specifications.
| Standard | Grade | Description |
|---|---|---|
| ASTM A463 | Type 1 | Aluminum-silicon coated steel for high-temperature applications |
| ASTM A463 | Type 2 | Pure aluminum coated steel for corrosion resistance |
| EN 10346 | DX51D+AS | General forming grade |
| EN 10346 | DX52D+AS | Deep drawing grade |
| EN 10346 | DX53D+AS | Extra deep drawing grade |
| EN 10346 | DX54D+AS | Complex forming applications |
| JIS G3314 | SA1C | Commercial quality aluminized steel |
| JIS G3314 | SA1D | Drawing quality aluminized steel |
| JIS G3314 | SA1E | Deep drawing quality aluminized steel |
Common Coating Weights
| Coating Designation | Coating Weight (Both Sides) |
| AS060 | 60 g/m² |
| AS080 | 80 g/m² |
| AS100 | 100 g/m² |
| AS120 | 120 g/m² |
| AS150 | 150 g/m² |
Higher coating weights generally provide better corrosion resistance and longer service life.
Common Thickness Range
Alusi steel is available in a wide range of thicknesses.
| Product Type | Thickness Range |
| Coil | 0.30 – 3.00 mm |
| Sheet | 0.40 – 6.00 mm |
| Plate | 3.00 – 12.00 mm |
| Exhaust Tubing Material | 0.80 – 2.00 mm |
Common Width Range
| Product Form | Width |
| Coil | 600 – 1500 mm |
| Sheet | 1000 mm |
| Sheet | 1219 mm (4 ft) |
| Sheet | 1250 mm |
| Sheet | 1500 mm |
Common Sheet Sizes
| Thickness | Width × Length |
| 0.8 mm | 1000 × 2000 mm |
| 1.0 mm | 1219 × 2438 mm |
| 1.2 mm | 1219 × 2438 mm |
| 1.5 mm | 1250 × 2500 mm |
| 2.0 mm | 1500 × 3000 mm |
| 3.0 mm | 1500 × 6000 mm |
Key Characteristics
- Excellent heat resistance up to high operating temperatures
- Superior oxidation resistance compared with ordinary carbon steel
- Good corrosion resistance in atmospheric environments
- Excellent stamping and forming performance
- Good weldability and fabrication properties
- Attractive silver-gray metallic surface
Typical Applications
- Automotive exhaust pipes
- Mufflers and resonators
- Heat shields
- Industrial furnace components
- Chimney systems
- HVAC ductwork
- Heating equipment
- Thermal processing systems
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