Galvalume is cold rolled galvanized steel with metal coating composed of Aluminium (55%), Zinc (43,4%) and Slicium (1,6%).
Galvalume is suitable for application in making:
- Roofing and flashings
- Wall claddings
- Gutters and down pipes
- Steel house frames
- Garage doors
- Garden sheds
- Some vehicle exhaust components
Galvalume is formable, weldable and readily accepts paint finishes.
Galvalume coated steel has superior long term corrosion resistance in most atmospheric conditions. This is achieved through the combination of the sacrificial protection of the zinc and the barrier protection of the aluminium. Corrosion rates vary according to the severity of conditions, Galvalume steel coatings out-perform galvanized coatings from 2 – 6 times. The protective mechanism for Galvalume and hot-dip-galvanized steel are such that the hot-dip-galvanized coating initially protects better but the zinc coat will gradually corrode away more and more in the vicinity of the edge and the protective effect will be lost.Then the aluminium part of the Galvalume coating will persist for a longer period of time, and the protection will thereby remain.
Typical Ranges of Mechanical Properties
Weight (Mass) of Coating Requirements
Coating Bend Test Requirements