Zinc-Aluminum-Magnesium Coated Steel Coil (ZAM)

Factory-direct supply of high-performance ZAM coated steel coil, with superior corrosion resistance compared to traditional galvanized steel. Designed for long-lasting protection in harsh, humid, and coastal environments, ideal for roofing, solar structures, and infrastructure projects.

Our ZAM coil is coated with a high-performance Zinc-Aluminum-Magnesium alloy, forming a self-healing protective layer that resists rust even if scratched.

It offers 2–3 times the corrosion resistance of standard GI coil, with excellent formability, weldability, and paint adhesion. Perfect for projects where long-term durability is a priority, we provide customizable specifications to meet your exact needs.

Why Choose Our ZAM Coil?

We know you need steel that won’t fail in tough conditions. Our ZAM coil solves the biggest pain points of traditional coatings:

✅ Superior Corrosion Resistance: 2–3x longer lifespan than standard galvanized steel, even in coastal and tropical climates
✅ Self-Healing Coating: Minor scratches automatically seal themselves, preventing rust spread
✅ No Additional Maintenance: No need for extra painting or touch-ups, saving you time and cost
✅ Versatile Performance: Works for roofing, solar brackets, and structural components with ease

Our Solution: Reliable GI Coil Tailored to Your Needs

Item	Specification
Substrate	Cold Rolled Steel Coil (CRC)
Material Grade	DX51D / DX52D / S250GD / S350GD / S450GD
Thickness	0.30mm – 4.0mm
Width	600mm – 1500mm
Coating Composition	Zn-Al-Mg Alloy (Al: 3–11%, Mg: 1–3%)
Coating Weight	60–275 g/m² (customizable)
Surface Finish	Regular / Zero spangle
Standards	JIS G3323 / ASTM A1046 / EN 10346
Coil Weight	2–10 tons (customizable)

Longer Lifespan, Lower Total Cost

Superior corrosion resistance means fewer replacements and maintenance costs over the life of your project.

Self-Healing Protection Against Scratches

The alloy coating seals small cuts and scratches automatically, preventing rust from spreading.

Ideal for Harsh & Coastal Environments

Performs reliably in high humidity, salt spray, and tropical climates where standard GI fails quickly.

Factory-Direct Pricing & Stable Supply

Competitive factory pricing with bulk order support. Monthly capacity ensures your projects stay on schedule.

Roofing & Wall Cladding:

Long-lasting protection for warehouses, factories, and residential buildings in humid areas.

Solar Mounting Structures

Perfect for solar brackets and frames, resisting corrosion outdoors for decades.

Infrastructure & Guardrails

Durable choice for road guardrails, bridges, and outdoor structural components.