DC51D+ZM Zn-Al-Mg Galvanized 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.

The DC51D+ZM designation represents the pinnacle of next-generation coated steel sheet technology. Governed by international standards such as EN 10346, the alphanumeric code indicates a continuous hot-dip coated flat product structural base engineered for cold forming (DC51D), integrated with a highly advanced Zinc-Aluminum-Magnesium alloy metallic coating (+ZM). The chemical matrix typically contains a precise proportion of Magnesium (1.5% – 3.0%) and Aluminum (1.0% – 2.5%), with the remainder composed of high-purity Zinc.

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● Longer service life than other coated products.

● Cut edge rust protection - the hallmark feature of ZAM.

● Thinner coating yet more protection - ecologically friendly.

● Excellent in severe environments - especially coastal and agricultural.

● Eliminates the need for post dip (batch) galvanizing.

● Superior formability due to coating characteristics Cost savings through longer service life and reduced maintenance.

● Bridges the product gap between heavily coated galvanized and costly stainless steel.

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The applications of DC51d+ZM Zinc Aluminum Magnesium Hot Dipped 3mm Galvanized Steel Coil include but are not limited to the following areas:

1. Building Construction:

Used in the fabrication of roofing, siding, gutters, and downspouts due to its corrosion resistance and durability.
2. Structural Steel:

Provides enhanced corrosion protection for steel structures in bridges, buildings, and industrial facilities.
3. Automotive Industry:

Used in the manufacturing of automotive parts, such as body panels, chassis components, and exhaust systems.
4. Electrical Appliances:

Offers protection against corrosion in applications like washing machines, refrigerators, and air conditioning units.
5. Sheet Metal Fabrication:

Suitable for forming, welding, and fabrication processes in the production of sheet metal products.
6. Infrastructure:

Applied in the construction of pipelines, storage tanks, and utility poles for corrosion resistance and durability.
7. Shipping and Maritime:

Used in the fabrication of containers, ships, and offshore structures due to its corrosion resistance in marine environments.

Application Zn-Al-Mg Galvanized Steel Coil

Our primary structural application focuses on DC51D+ZM Utility-Scale Photovoltaic Brackets and Solar Racking Systems. Solar arrays are continually subjected to intense wind loads, snow loads, ambient UV degradation, and localized atmospheric acidity. Our structural components are purpose-built to survive these environments.

Our production facilities host multi-stage automated cold-roll forming systems and robotic processing work cells that deliver high dimensional accuracy across a diverse catalog of solar mounting configurations:

1. C-Channel, Z-Purlin, and U-Beam Multi-Profiles:

Continuous roll forming with programmable length matrices, matching structural cross-sections required for main support pillars, purlins, ground beams, and inclined rafters.

2. Automated CNC Punching & Notching:

In-line, high-speed multi-die hydraulic punching ensures that pre-engineered mounting holes, connecting slots, and wiring tracks are executed flawlessly to allow rapid, bolt-together site assemblies without field welding.

3. Custom Racking Sub-Components:

Production of heavy-duty connectors, splice sleeves, end clamps, and custom base plate interfaces engineered to handle localized shear forces.

GNEE STEEL can also produce the following grades; please contact us for custom orders：

Q1: Why is DC51D+ZM better than traditional HDG for solar brackets?

A: DC51D+ZM provides 5–10 times higher corrosion resistance and features a unique self-healing effect on cut edges. It eliminates the need for post-fabrication dipping, reducing structural weight by 15%–30% while offering a longer lifespan (25–30 years).

Q2: Can you customize the PV brackets based on our drawings?

A: Yes. With our automated cold-roll forming and CNC punching lines, we custom-manufacture C, Z, and U channels, as well as tracking components, to match your precise engineering blueprints and load requirements.

Q3: How does the self-healing edge protection work?

A: When exposed to atmospheric moisture, Magnesium and Aluminum ions in the coating migrate over sheared edges and holes. They form a dense crystalline layer (Simonkolleite) that seals the exposed steel and prevents red rust without zinc sprays.

Q4: Do your products comply with international standards?

A: Yes. Our DC51D+ZM coils strictly comply with EN 10346 and DIN 17162. Every shipment includes an official Mill Test Certificate (MTC) detailing mechanical properties, chemical composition, and coating mass.

Q5: What are your typical lead times for delivery?

A: We maintain a large permanent stock of master coils. Raw coil slitting takes 3–5 days, while custom PV bracket production can begin within 48 hours of drawing confirmation to ensure fast site delivery.

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