What is DC51D+ZM ?
DC51D+ZM is a revolutionary aluminum magnesium zinc coated steel plate that innovatively upgrades traditional galvanizing and integrates aluminum (Al), magnesium (Mg), and zinc (Zn) heavy metal protection to create a super corrosion-resistant, self-healing, and high aesthetic steel protective shield!
The DC51d refers to the steel grade, which specifies the chemical composition and mechanical properties of the steel. The "+ZM" indicates the addition of zinc, magnesium, and aluminum elements through the hot-dip galvanizing process.

Product Description
Dc51d+ZM Zinc Aluminum Magnesium Hot Dipped 3mm Galvanized Steel Coil is a type of galvanized steel coil with a thickness of 3mm. It undergoes a hot-dip galvanizing process and incorporates zinc, aluminum, and magnesium for enhanced corrosion resistance.
The 3mm thickness of the steel coil makes it suitable for various fabrication processes, including welding, bending, and cutting. It offers a balance between strength and flexibility, allowing for the production of a wide range of components and structures.
| Product Name: | Dc51d+Zm Zinc Aluminum Magnesium Hot Dipped 3mm Galvanized Steel Coil |
| Standard: | Q/BQB 420 -2018,EN 10130 |
| Material: | DX51D, DC01 |
| Grade: | DX51D (DX52D,DX53D are also available) |
| Coil weight: | 3-10 ton or according to your request |
| Thickness: | 0.25mm-6mm |
| Width: | 600mm-1250mm or according to your request |
| Surface Coating: | Zn-1.5%Al-1.5%Mg, Zn-2.0%Al-2.0%Mg, Zn-6.0%Al-3.0%Mg oraccording to your request |
| Surface: | Chromated, un-oiled,Zero spangel,regular spangle |
| Performance: | durable, anti-fingerprint |
| MOQ: | 5 ton per size |
| Supply Ability: | 5000t/month |
| Delivery Time: | Within 15 days after receiving the pre-payment. |
| Export Packing: | Standard Export Seaworthy Package. |
| Payment Terms: | L/C at sight, T/T or Negotiable. |
This type of galvanized steel coil is commonly used in applications where corrosion protection is paramount, such as in the construction industry, automotive manufacturing, and electrical equipment. The zinc-aluminum-magnesium coating provides enhanced durability and resistance to rust, ensuring the longevity of the steel.
When using DC51d+ZM Zinc Aluminum Magnesium Hot Dipped 3mm Galvanized Steel Coil, it is important to follow proper handling and installation guidelines to maximize its corrosion resistance and performance. This will help ensure the longevity and reliability of the steel in the intended application.
Mechanical Property
| 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 |
Our core processing capabilities
GNEE STEEL is not only a premier source supplier of high-quality steel but also operates an industry-leading steel deep-processing center. Moving beyond the traditional raw-material supply model, we deliver tailor-made fabrication solutions transforming sheets and coils into precision components based on your engineering blueprints.

CNC Punching & Drilling
Equipped with high-precision CNC punching machines, we deliver accurate positioning, punching, and drilling on steel plates and profiles of various thicknesses. All edges are smooth and burr-free, ensuring seamless bolt alignment during on-site assembly.
Precision Cutting
Utilizing high-power laser and plasma cutting systems, we support large-scale and complex shape profiling. Dimensional tolerances are strictly controlled within minimal ranges, perfectly replicating your technical designs.


Precision Bending & Forming
Powered by heavy-duty, high-tonnage press brakes, we provide multi-angle and complex cold-bending fabrication for diverse steel plates and high-strength structural steels, guaranteeing precise angles without compromising material integrity.
Expert Welding
Our certified welding team possesses deep expertise in handling high-strength structural steels and coated metals (such as Zinc-Aluminum-Magnesium and galvanized sheets). We ensure deep-penetration, robust welds that guarantee structural safety under severe loading conditions.

By seamlessly integrating direct mill supply with precision downstream fabrication, GNEE STEEL effectively eliminates secondary logistics, compresses procurement costs, and significantly accelerates your project timeline. Whether you require standard fabricated parts or complex custom structural components, we deliver ready-to-install solutions directly to your site.
FAQ
What is DC51D+ZM steel?
DC51D+ZM is a cold-forming steel grade coated with a Zinc-Aluminum-Magnesium (ZM) alloy layer. It combines excellent formability with superior corrosion resistance, making it suitable for construction, solar mounting systems, automotive parts, and industrial equipment.
How does DC51D+ZM compare with traditional galvanized steel?
DC51D+ZM generally offers significantly higher corrosion resistance than conventional hot-dip galvanized steel. The addition of aluminum and magnesium helps create a protective layer that slows rust formation and improves cut-edge protection.
What are the main applications of DC51D+ZM steel?
DC51D+ZM is widely used in solar mounting structures, cable trays, agricultural equipment, steel framing, HVAC systems, automotive components, and outdoor infrastructure where long-term corrosion protection is required.
Can DC51D+ZM steel be welded and formed?
Yes. DC51D+ZM maintains good bending, stamping, roll-forming, and welding performance. It is designed for cold-forming applications and can be processed using standard fabrication methods.
Why is DC51D+ZM popular for solar mounting systems?
DC51D+ZM provides excellent outdoor durability, strong cut-edge corrosion protection, and a long service life. These advantages help reduce maintenance costs and make it an ideal material for solar PV mounting brackets and ground-mounted support structures.




