Alusi® is a premium metallic-coated steel designed for extreme temperature applications, ensuring exceptional heat resistance, corrosion protection, and reflectivity. Engineered with a 90% aluminium and 10% silicon coating, Alusi® delivers long-lasting performance in automotive, domestic, and industrial environments.
Manufactured using a process analogous to hot-dip galvanising, Alusi® provides:
- Superior corrosion resistance against fuels, solvents, and chemical agents (pH 4.5 – 8.5)
- High thermal stability: withstands temperatures up to 800°C without degradation
- Up to 80% heat reflectivity, reducing thermal stress and improving energy efficiency
- Enhanced durability, outperforming traditional galvanised steel in high-heat environments
Why choose Alusi®?
Unmatched heat resistance and thermal protection
- Alusi® withstands temperatures up to 800°C, far exceeding standard galvanised coatings.
- The silicon content prevents flaking or degradation, even under extreme heat exposure.
- At 480°C, Alusi® performs up to 10 times better than aluminium, ensuring longevity in high-heat applications.
- The natural aluminium oxide layer provides continuous protection, self-renewing when scratched.
Superior corrosion resistance
- 90% aluminium composition makes Alusi® highly resistant to oxidation and chemical corrosion.
- Tested to last 3,650 hours at 350°C with no surface damage, compared to severe degradation in standard coatings.
- Resistant to exposure from oil, gasoline, kerosene, acetone, alcohol, printing inks, and acids.
Optimised for formability and welding
- Suitable for deep drawing, bending, and roll forming, making it highly versatile.
- Equivalent bendability to classic galvanised steel with no flaking even at tight T-bend radii.
- Compatible with resistance spot welding, high-frequency induction welding, and laser welding.
- Alusi® welds can remain unprotected, or be re-coated using aluminium-rich paint or metallisation for added durability.
Seamless paintability and surface treatments
- Direct painting possible, but phosphating is recommended for improved adhesion.
- Available with Easyfilm®, a thin organic protective layer, allowing direct painting without pre-treatment.
- Optional 50µm protective film can be applied to prevent damage during handling and transport.
Versatile applications across industries
Thanks to its high heat resistance, excellent corrosion protection, and superior reflectivity, Alusi® is the ideal choice for demanding applications in:
Automotive
- Heat shields
- Exhaust systems
- Oil filters
- Gaskets
Domestic Appliances
- Ovens and baking trays
- Barbecues and chimneys
- Heating elements and stove pipes
Industrial & HVAC
- Heat exchangers - Radiant tubes
- Heating, ventilation, and air-conditioning (HVAC) systems
Alusi®’s superior durability ensures a longer lifespan, reducing maintenance costs and improving efficiency in all applications.
Technical specifications,custom solutions for every need
Alusi® is available in multiple coating weights, ensuring adaptability across industries:
| Coating weight |
Total thickness (µm per side) |
| AS60 |
10.0 µm |
| AS80 |
13.0 µm |
| AS100 |
17.0 µm |
| AS120 |
20.0 µm |
| AS150 |
25.5 µm |
| AS240 |
40.0 µm |
- Steel grades: Available in cold-forming, structural, HSLA, and high-emissivity options
- Thickness range:
- 0.40 mm – 3.00 mm (thinner and thicker gauges available on request)
- Width : 750 – 1600 mm
- Surface treatments: Oiled, E-passivation®, Easyfilm®
- Compliance: RoHS-compliant, food contact certified (EC 1935/2004)
Why Alusi® is the best choice for high-performance metallic-coated steel
- Exceptional high-temperature performance – ideal for applications up to 800°C
- Long-term corrosion resistance – withstands chemicals, fuels, and extreme environments
- Superior thermal reflectivity – reduces energy consumption and improves efficiency
- Versatile processing capabilities – supports bending, welding, forming, and painting
- Certified quality – meets EN 10346 and ASTM A463/A463M Type 1 standards
Discover the future of heat-resistant steel
Alusi® delivers unparalleled durability, performance, and efficiency. Its unique aluminium-silicon coating ensures high heat resistance, corrosion protection, and sustainability, making it the go-to solution for industrial, domestic, and automotive applications.
