EN 10346 DX51D+Z200: Heavy-Duty Galvanized Steel for Long-Term Structural Integrity
Our EN 10346 DX51D+Z200 Galvanized Steel Coils are engineered for high-durability construction projects that demand superior resistance to oxidative stress and atmospheric corrosion. Compliant with the premier European standard EN 10346, this heavy zinc-coated material provides a robust $200g/m^2$ protective barrier, making it the preferred choice for industrial roofing, agricultural silos, and structural decking in high-humidity or coastal environments.
Advanced Surface Protection & Quality Control
To ensure our coils perform under the most challenging job site conditions, we implement rigorous surface treatments and inspections:
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Spangle Customization: Available in Regular Spangle for traditional aesthetics or Minimized/Zero Spangle for a smooth finish suitable for post-processing or high-end architectural facades.
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Corrosion Inhibition: Every coil undergoes Chemical Passivation (Chromated) or anti-fingerprint treatment to inhibit “white rust” formation during long-distance maritime transit and outdoor storage.
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Tension Leveling & Flatness: We utilize advanced tension-leveling technology to ensure superior flatness, eliminating internal stresses and ensuring the coil remains flat during high-speed decoiling and slitting.
Key Performance Advantages
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Superior Bendability: Despite the thick $200g/m^2$ zinc layer, our coils maintain excellent adhesion, passing the 0T-2T bend test without flaking or micro-cracking of the protective barrier.
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Environmental Resilience: Rated for C3 and C4 corrosivity categories, Z200 steel is designed to thrive in industrial atmospheres and moderate salinity environments where standard Z100 products would fail.
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Metallurgical Bond: The hot-dip process ensures the zinc layer is chemically bonded to the steel substrate, creating an indestructible shield against moisture and oxygen.
Technical Specifications Summary
| Feature | EN 10346 / EN 10143 Requirement | Bomis Steel Performance |
| Substrate Grade | DX51D (Structural/Forming) | Prime Quality Certified |
| Zinc Coating Mass | $200g/m^2$ (Z200) | Precision Controlled $\pm 5g$ |
| Surface Finish | Regular / Zero Spangle | Optimized for End-Use |
| T-Bend Test | $\leq$ 2T (No Peeling) | Guaranteed Adhesion |
| Chemical Treatment | Passivated / Oiled / Dry | Anti-Rust Options Available |
| Thickness Tolerance | Per EN 10143 (Restricted) | High-Precision Micrometric |
DX51D Z200 Galvanized Steel Coil Classification
The material is available in several designations as follows:
Commercial Steel (CS Types A, B, and C),
Forming Steel (FS Types A and B),
Deep drawing steel (DDS),
Extra deep drawing steel (EDDS),
Structural steel (SS),
High strength low alloy steel (HSLAS Type A), and
High strength low alloy steel (HSLAS Type B).
Certification
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DX51D Z200 Galvanized Steel Coil Application Scenarios
The applicable scenarios and environments for DX51D Z200 galvanized steel coils are determined by their corrosion resistance and formability characteristics:
Applicable Scenarios:
Construction Industry
Enclosure structures for light steel structures: such as roof panels, wall panels, and framing for skylights in factories, warehouses, and airport terminals, or simple fences and walls for
prefabricated houses.
Building decoration and accessories: such as balcony railings, ventilation duct casings, and rainwater gutter components.
Hardware Manufacturing Industry
Can be used to manufacture hardware shelves, tool cabinet bodies, metal parts of trash cans, or small agricultural tool accessories.
Applicable Environments:
Dry/Semi-dry inland environments
In this environment, the air humidity is low and there are few corrosive substances. The galvanized layer of DX51D Z200 can achieve the longest anti-corrosion lifespan, making it the most suitable application environment, such as inland factories, warehouses, and civil buildings.
Urban environments
The air humidity in urban areas is higher than in inland areas, and there are small amounts of dust and corrosive substances from automobile exhaust. The galvanized layer of this steel coil can provide sufficient anti-corrosion capabilities without frequent maintenance.
Coastal areas with light salt spray (1-3 kilometers from the coastline)
This environment has a small amount of salt spray, but the concentration is not high. The Z200 galvanized layer can provide sufficient protection and maintain long-term use, such as small warehouses near the coast and external components of coastal civil buildings.
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Frequently Asked Questions
1.Why choose Z200 over Z100 for construction?
Z200 provides a much thicker zinc barrier (200g/m²), making it essential for high-corrosion areas like coastal regions or industrial zones. It significantly extends the service life of the steel.
2.Is the Z200 coating prone to peeling during bending?
No, our hot-dip process ensures the Z200 layer forms a strong metallurgical bond with the steel base, allowing for 180-degree bending without cracking or flaking.
3.Are you a manufacturer or a trading company?
We are a factory with over 10 years of sales experience
4.How do you guarantee the quality?
1) Sourcing only from top-tier, certified mills.
2) Conducting our own rigorous in-house QC checks.
3) Providing a formal Mill Test Certificate and our quality warranty for every shipment.
