Zn-Al-Mg Steel Coil
Zinc-aluminum-magnesium(ZAM) coating is through the role of aluminum and magnesium, so that the hot dip coating has excellent corrosion resistance, wear resistance and processing, can be widely used in various fields.
In the hot-dip galvanizing production line, the pretreated steel strip is immersed in a zinc solution containing aluminum and magnesium to obtain a coating. The mass percentage of magnesium in the zinc-magnesium alloy solution is 1.0-2.0%, the mass percentage of aluminum is 0.8-3.0%, the mass percentage of other trace control elements is less than 1%, and the remaining components are zinc.
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Product Classification
| Type | Aluminum Content | Main Characteristics |
| Low-Al Zn-Al-Mg | 1%-3.5% | Upgraded corrosion resistance from hot-dip galvanizing |
| Medium-Al Zn-Al-Mg | 5%-11% | Balanced corrosion resistance and workability, e.g., Zn-11%Al-3%Mg |
| High-Al Zn-Al-Mg | ~55% | Upgraded corrosion resistance from hot-dip galvalume |
Which type would you like to know about ?
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Common Grades and Standards
| Common Grades and Standards | ||
| Grade | Standard | Characteristics & Applications |
| DX51D+ZM | EN 10346 | Commercial grade, general forming, for construction and general use |
| DX52D+ZM | EN 10346 | Drawing grade, for medium forming requirements |
| DX53D+ZM | EN 10346 | Deep drawing grade, for complex forming |
| DX54D+ZM | EN 10346 | Extra deep drawing grade |
| S250GD+ZM | EN 10346 | Structural grade, 250MPa yield strength |
| S350GD+ZM | EN 10346 | Structural grade, 350MPa yield strength |
| S550GD+ZM | EN 10346 | High-strength structural grade, 550MPa yield strength |
| DC51D+ZM | Low carbon steel, for appliances and general fabrication | |
| Coating Specifications | ||
| Coating Designation | Coating Weight (Both Sides) | Typical Applications |
| ZM60 | 60 | General indoor use |
| ZM90 | 90 | Light industry, appliances |
| ZM120 | 120 | Construction, general use |
| ZM150 | 150 | Construction, outdoor structures |
| ZM180 | 180 | Highly corrosive environments |
| ZM200 | 200 | Harsh environments, coastal/industrial areas |
| ZM275 | 275 | Heavy corrosion environments |
| ZM350 | 350 | Special heavy corrosion requirements |
GNEE STEEL can also produce other grades; you can contact us for customization!
| Grade | Tensile Test a, b, c | r₉₀ b ≥ | n₉₀ b ≥ | ||
|---|---|---|---|---|---|
| Yield Strength MPa | Tensile Strength MPa | Elongation after Fracture A₈₀mm ≥ | |||
| DC51D+Z, DC51D+ZM, DC51D+XM, DC51D+ZF | 140～300 | 270～500 | 22 | - | - |
| DD51D+Z, DD51D+ZF | - | 270～500 | - | - | - |
| DC52D+Z, DC52D+ZM, DC52D+XM, DC52D+ZF | 140～260 | 270～420 | 26 | - | - |
| DC53D+Z, DC53D+ZM, DC53D+XM, DC53D+ZF | 140～220 | 270～380 | 30 | - | - |
| DC54D+Z | 120～200 | 260～350 | 36 | 1.6 d | 0.18 |
| DC54D+ZF, DC54D+ZM, DC54D+XM | 120～200 | 260～350 | 34 | 1.4 d,e | 0.18 e |
| DC56D+Z | 120～180 | 260～350 | 39 | 1.9 d | 0.21 |
| DC56D+ZF, DC56D+ZM, DC56D+XM | 120～180 | 260～350 | 37 | 1.7 d,e | 0.20 e |
| DC57D+Z | 120～170 | 260～350 | 41 | 2.1 d | 0.22 |
|
DC57D+ZF, DC57D+ZM, DC57D+XM |
120～170 | 260～350 | 39 | 1.9 d,e | 0.21 e |
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Our Qualifications
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Packaging and Shipping
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Client Visit
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FAQ
Q: What is a Zinc-Aluminum-Magnesium (ZM) steel coil?
A: It is a cold-rolled steel coil coated with a zinc-aluminum-magnesium alloy, offering excellent corrosion resistance and long service life.
Q: What are the main benefits of ZM steel coils?
A: Superior corrosion protection, lightweight coating, good formability, and long-lasting outdoor performance.
Q: Where are ZM steel coils commonly used?
A: Solar mounts, roofing, building panels, automotive parts, and other outdoor applications.
Q: Can ZM steel coils be cut, bent, or welded?
A: Yes, they are suitable for standard cold-forming, cutting, bending, and welding processes.
Q: How long does ZM steel coil last outdoors?
A: Typically 2–3 times longer than traditional galvanized steel, depending on environment and coating thickness.
