Description

Zn-Alu-Mg Steel Coil is an alloy-coated steel primarily composed of zinc, with added aluminum (1%–11%), magnesium (1%–3%), and trace amounts of silicon.

The alloy coating of zinc-aluminum-magnesium steel coils is a dense ternary eutectic structure formed by high-temperature solidification of zinc (Zn), aluminum (Al), and magnesium (Mg). , forming a dense super coating on the surface of the steel plate, which effectively prevents corrosion and can adapt to various harsh environments. It is a new type of environmentally friendly and energy-saving steel plate.

Features of Zn-Alu-Mg Steel Coil:

1. Excellent Corrosion Resistance: 10–20 times stronger corrosion resistance than ordinary hot-dip galvanized steel coil, especially outstanding in harsh environments such as those containing chlorine, salt spray, and acid rain. Some grades showed no red rust after 3300 hours of neutral salt spray testing.

2. Self-Healing Capability of Cut Edges: The Mg and Al in the coating of Zn-Alu-Mg Steel Coil form a dense basic zinc chloride/magnesium hydroxide protective film during corrosion, covering defects such as cut surfaces and scratches, and inhibiting further oxidation of the substrate.

3. High Hardness and Wear Resistance: The coating has a Vickers hardness of HV140–190 (compared to approximately HV70–80 for ordinary galvanized steel coil), a low coefficient of friction, and less wear on stamped edges, reducing burr defects.

4. Excellent Processing Performance: Zn-Alu-Mg Steel Coil possesses good stamping, bending (e.g., the coating does not peel off when bent at 180°), and weldability (Mg reduces laser welding spatter), making it suitable for complex formed parts.

5. Lightweight and Economical: For the same lifespan, the coating thickness of Zn-Alu-Mg Steel Coil can be thinner than galvanized steel (e.g., 275g/m² Zn-Al-Mg ≈ 800g/m² galvanized steel), achieving weight reduction and cost reduction; although the unit price is higher than galvanized steel, the total life-cycle cost is lower.

6. Environmental Compliance: Free from hexavalent chromium and other harmful substances, it complies with RoHS and other environmental standards, and the production process generates less pollution than traditional galvanizing.

Applications of Zn-Alu-Mg Steel Coil:

Zn-Alu-Mg steel coils are mainly used in fields requiring strong corrosion and high durability, covering construction, photovoltaics, agriculture, power, transportation, home appliances, and industrial equipment.

1. Building Structures: Roofing sheet, walls, joists, cable trays, cooling towers, roller shutters, modular houses (especially suitable for high-humidity, high-salt environments such as coastal areas and industrial zones).

2. Photovoltaic Power Generation: Photovoltaic brackets (C-type/Z-type steel, thickness typically 1.5–5.0mm), becoming a mainstream alternative material due to excellent self-healing cuts and weather resistance.

3. Agricultural Facilities: Greenhouses, livestock sheds (pigs/chicken houses), grain silos and feeding equipment, resistant to ammonia and moisture corrosion.

4. Power and Communications: Transmission and distribution switchgear, prefabricated substation enclosures, communication tower components, ensuring long-term outdoor reliability.

5. Transportation: Highway guardrails, railway sleeper pads, automobile mufflers/fuel tanks/cargo boxes (some vehicle models).

6. Home Appliances and Manufacturing: Air conditioner/refrigerator back panels, industrial ovens, electrical cabinets (Zhonglv has already achieved mass production applications in the home appliance industry).

7. Underground engineering and warehousing: Pipe gallery cable supports, racking systems, and storage racks (requiring both load-bearing capacity and rust prevention).

Zn-Alu-Mg steel coil coating contains Al and Mg (typically Zn-3%Al-3%Mg), possessing characteristics such as self-healing cuts, strong salt spray resistance (10–20 times that of ordinary galvanizing), and good formability and weldability. It is gradually replacing hot-dip galvanized steel sheet and aluminized zinc plates.

Specifications of Zn-Alu-Mg Steel Coil:

Zn-Alu-Mg Steel Coil
SCS51D	DC51D+ZM	H180BD+ZM	S280GD+ZM
SCS52D	DC52D+ZM	H220BD+ZM	S320GD+ZM
SCS53D	DC53D+ZM	H260LAD+ZM	S350GD+ZM
SCS300	DC54D+ZM	H420LAD+ZM	S390GD+ZM
SCS340	DC56D+ZM	H460LD+ZM	S400GD+ZM
SCS400	DD51D+ZM	HC180BD+ZM	S420GD+ZM
SCS440	DDX51D+ZM275	HC180YD+ZM	S450GD+ZM
SCS490	DX51D+AZM	HC220YD+ZM	S500GD+ZM
SCS570	DX51D+ZM	HC260LAD+ZM	SG340+ZM
SCS51D+ZM	DX52D+ZM	HC260YD+ZM	SG350+ZM
AZM	DX53D+ZM	HC340/590DPD+ZM	SGC340+ZM275
ZAM	DX54D+ZM	HC340LAD+ZM	SGC440+ZM275
A792M/CSBAZM150	DX56D+ZM	HC420LAD+ZM	SGH340D+ZM
A792M/CSBT/AZM100	DX57D+ZM	HCT780X+ZM	SGH340D+ZM-275
A792M/S550/AZM150		HD380LAD+ZM	SGH440+ZM275
CR340LAD+ZM		HX340LAD+ZM	A792M/CS+AZM70
		S250GD+ZM

Standards and Classifications

Zn Alu Mg Steel Coil Zn-Alu-Mg Steel Coil Zinc Aluminum Magnesium Alloy Steel Sheet In Coil
Application	cutting sheets, making corrugated sheets, making container, making fences
Thickness	0.5mm-6.0mm
Width	40-1500mm Or customized
Length	Customized
Grade	SCS51D+ZM, SCS490+ZM, DD51D+ZM, DC51D+ZM, S350GD+ZM, etc.
Coating	Customized
Tolerance	±1%
Surface treatment	Zn-Al-Mg Coated
Technology	Galvanize Aluminnum Magnesium
Coil ID	508mm-610mm
Sample	Sample Freely
Coil Weight	4.5 -5.0 Tons
Packing	Standard Seaworthy Packing
Advantage	Easy processing / strong corrosion resistance / strong rust resistance / high hardness
Monthly Output	8000 Tons