ZAM Steel

Product Name	ZAM steel
Base Metal	Cold rolled steel
Thicknesses	0.3 – 4mm
Width	600-1500mm
Coating thickness	60-180g/㎡
Surface treatment	Passivation, Fingerprint resistance, Oil coating
Grade	SPHC, SPHD, SPHE, DX51D, DX52D, DX53D, SPCC, SPCD, A1006, A1008, etc
Value-added services	Cutting, slitting, shearing
MOQ25	25 tons
Packing	Standard export packaging (waterproof paper inside and steel strap outside)

Chemical Composition

Chemical composition of substrate (taking DX51D as an example)	C	Mn	P	S	Fe
	≤0.12%	≤0.50%	≤0.045%	≤0.045%	Remainder
Coating chemical composition	Zn	Al	Mg	Si	Fe
	55% – 65%	20% – 30%	1.5% – 3.5%	0.1% – 0.5%	≤0.3%

Production video

Application of zam steel

• Construction industry: Lightweight steel framing systems, Roofing structures and purlins, Curtain wall support systems.
• Solar & renewable energy: Solar mounting structures, Ground-mounted PV systems, Wind energy auxiliary frames.
• Transportation: Truck body structural parts, Container reinforcement panels, Rail auxiliary components.
• Agriculture: Greenhouse structural frames, Livestock housing systems.
• Industrial equipment: Electrical enclosures, HVAC structural components, Machinery protective covers.

Key Advantages of ZAM Steel

1. Excellent corrosion resistance: ZAM steel offers significantly improved resistance to rust compared to traditional galvanized steel, especially at cut edges and scratched surfaces.
2. Superior edge protection: The magnesium component helps form a stable protective film that reduces corrosion propagation from cut edges.
3. Reduced maintenance cost: Longer service life reduces repainting and replacement frequency in structural applications.
4. Stable performance in harsh environments: Suitable for coastal areas, industrial zones, and high-humidity climates.
5. Cost-effective alternative to stainless steel: In many structural applications, ZAM steel provides a balance between performance and cost.

The role of each element in the zam steel coating

First, let’s introduce the main components of the coating in the zinc-aluminum-magnesium steel. The content of zinc 80%-90%, aluminum 5%-11%, magnesium 1%-3% and a small amount of silicon.

1. Sacrificial protection (zinc), The main function of zinc is to prevent steel from rusting.
2. Self-repairing corrosion product layer (magnesium effect), The role of magnesium is to improve corrosion resistance, because adding magnesium to the coating can reduce the surface tension of the coating and reduce the occurrence of leakage plating.
3. Barrier protection (aluminum),  The role of aluminum can enhance the corrosion resistance and heat resistance of steel.
4. The small amount of silicon in zam steel is mainly to inhibit the reaction between aluminum and iron.

The performance of zam steel sheet and galvanized steel sheet in salt spray corrosion experiments is shown in the figure below:

ZAM Steel vs GI Steel vs GL Steel

Property	ZAM Steel	GI Steel	GL Steel
Coating system	Zn-Al-Mg	Pure Zinc	Al-Zn
Corrosion resistance	High (edge protection advantage)	Medium	High (high temp advantage)
Cut-edge protection	Excellent	Weak	Medium
Lifespan	Long	Medium	Long
Cost	Medium-High	Low	Medium
Best use	Harsh outdoor environment	General indoor/outdoor	High temperature / industrial