Galvalume Steel
Galvalume Steel Coil & Sheet
Aluminum-zinc coated steel designed for long-term corrosion protection, heat resistance and durable performance in roofing, wall cladding, appliances and industrial building applications.
Aluminum-zinc Coated Steel for Long-term Protection
Galvalume steel is coated with an aluminum-zinc alloy layer. The coating combines the barrier protection of aluminum with the sacrificial protection of zinc, helping improve durability in demanding environments.
It is widely used for roofing, wall cladding, industrial buildings, appliances and applications that require stable corrosion resistance and heat resistance.
- Excellent long-term corrosion resistance
- Better heat resistance than standard galvanized steel
- Stable surface performance for roofing systems
- Suitable for outdoor and high-demand environments
- AFP, chromated, oiled and dry surface options
Product Technical Parameters
| Product | Galvalume Steel Coil / Sheet |
|---|---|
| Type | Aluzinc / Galvalume Steel |
| Thickness | 0.12mm – 2.0mm |
| Width | 600mm – 1500mm |
| Coating | 30g – 275g |
| Coating Composition | Aluminum-zinc alloy coating |
| Surface Treatment | AFP / Chromated / Oiled / Dry |
| Coil Weight | 2–15 MT |
| Coil ID | 508mm / 610mm |
| Application | Roofing, Wall Cladding, Industrial Buildings, Appliances |
Galvalume Steel Process Flow
A continuous aluminum-zinc coating process from coil preparation to surface treatment and recoiling.
Aluminum-zinc Coating Workflow
The galvalume line integrates strip preparation, annealing, aluminum-zinc alloy coating, cooling, surface treatment and recoiling into one continuous workflow.
Uncoiler No.1 / No.2
Steel coils are loaded and uncoiled to provide a stable strip feed for continuous galvalume production.
Welder
The tail of one coil is welded to the head of the next coil to keep the production line running continuously.
Entry Looper
The entry looper stores strip length temporarily, supporting coil change and welding without stopping the line.
Pre-treatment
The strip surface is cleaned and prepared to remove oil, dust and oxides before annealing and coating.
Annealing Furnace
The steel strip is heated under controlled conditions to improve mechanical properties and coating adhesion.
Al-Zn Coating Pot
The strip passes through the molten aluminum-zinc alloy bath to form a durable galvalume coating layer.
Air Knife
Air knives remove excess molten coating and precisely control the final aluminum-zinc coating thickness.
Cooling Tower
The coated strip is cooled in a controlled process to stabilize the aluminum-zinc alloy layer and surface quality.
Water Quench Tank
The strip is further cooled through water quenching to reach the required process temperature.
Skin Pass
A light rolling process improves strip flatness, surface appearance and dimensional stability.
Tension Leveler
Tension leveling corrects strip shape and reduces waves, edge defects and residual deformation.
Surface Treatment
AFP, chromated, oiled or dry treatment can be applied to improve storage, handling and surface performance.
Exit Looper
The exit looper stabilizes downstream speed and supports smooth transition before recoiling.
Recoiler
The finished galvalume strip is recoiled into steel coils for packaging, storage and shipment.
Reliable Steel for Demanding Environments
Stable Coating and Surface Inspection
Galvalume steel quality is controlled through coating weight testing, surface inspection, thickness control and packaging inspection to ensure reliable performance for export and construction use.