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What Is Galvalume?
Galvalume (AZ) and galvanized (GI) both protect steel — the coating alloy differs.
| GI (Galvanized) | Galvalume (AZ) | |
|---|---|---|
| Coating | ~100% zinc | 55% aluminium, 43.5% zinc, 1.5% silicon |
| Corrosion life | Good | Better in most atmospheres |
| Cut-edge | Strong sacrificial protection | Slightly less at cut edges |
| Use | Purlins, ducting, forming | Roofing, cladding, appliances |
Galvalume (aluminium-zinc) typically lasts longer in the sheet face and is popular for roofing; GI gives strong sacrificial edge protection. Both are the base for PPGI. We supply galvanized and AZ coil.
Frequently asked questions
Is Galvalume better than galvanized?
Galvalume generally lasts longer on the sheet face in most atmospheres; galvanized gives stronger sacrificial protection at cut edges. Choose by environment.
What does AZ150 mean?
An aluminium-zinc (Galvalume) coating mass of 150 g/m² over both surfaces.
Can Galvalume be prepainted?
Yes — PPGL is prepainted Galvalume, used for premium roofing and cladding.
Need mill-certified steel in bulk?
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