EN 10346 DX51D+Z140: Enhanced Corrosion Protection for Durable Infrastructure

Our EN 10346 DX51D+Z140 Galvanized Steel Coils are specifically engineered for projects requiring an elevated level of atmospheric protection without sacrificing material workability. Compliant with the rigorous European EN 10346 standard, this grade provides a robust $140g/m^2$ zinc coating mass, bridging the gap between standard commercial grades and heavy-duty industrial cladding. Whether for HVAC ducting, premium roofing, or agricultural structures
Bomis Steel’s Z140 coils ensure superior longevity and structural reliability.

Technical Specification: The DX51D+Z140 Advantage

Understanding the chemical and mechanical balance of this grade is essential for high-quality fabrication. According to the EN 10346 framework:

• DX51D (Forming Grade): This designation ensures the steel possesses the necessary ductility for cold-forming and bending. It is the industry’s most trusted grade for roll-forming into complex profiles, maintaining a consistent yield-to-tensile ratio.

• +Z140 (140g/m² Zinc Mass): The “140” signifies a total zinc coating weight of $140g/m^2$ (both sides). This provides approximately 40% more sacrificial protection than standard Z100 coils, making it highly effective in environments with higher humidity or moderate salinity.

Key Performance Benchmarks

• Superior Adhesion: The hot-dip process creates a metallurgical bond between the zinc and the steel substrate, passing the 0T-1T bend test without any flaking or peeling.

• Consistent Mechanical Integrity: High-quality base metal ensures predictable performance in automated stamping and profiling machines.

• Environmental Resilience: The Z140 coating mass is specifically rated for C2 and C3 corrosivity categories, providing a long-lasting barrier against oxidative stress.

Technical Summary (Compliance Table)

Feature	EN 10346 / EN 10143 Requirement	Bomis Steel Capability
Grade	DX51D (Commercial/Forming)	Prime Quality Certified
Zinc Mass	$140g/m^2$ (Z140)	Precisely Controlled $\pm 5g$
Surface Finish	Normal / Minimized Spangle	Optimized for Aesthetics
Tolerances	Normal / Restricted	High-Precision Micrometric
Bending Property	Suitable for Profiling	0T – 2T Pass
Chemical Treatment	Passivated / Oiled / Dry	Full Anti-Corrosion Options

DX51D Z140 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

Factory services

DX51D Z140 Galvanized Steel Coil Application Scenarios

Construction Industry: This steel coil is one of the main application areas, commonly used to manufacture components such as roofing panels, wall panels, gutters, ventilation ducts, soundproof walls, and purlins. These components are either exposed to the outdoors or located in humid indoor environments within buildings. Their corrosion resistance and formability meet the requirements for building structures, while also being compatible with various processing scenarios in construction.

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Frequently Asked Questions

 

1.How long will DX51D Z140 last in outdoor conditions?

With a 140g/m² zinc layer, Z140 offers moderate outdoor protection. In normal rural environments, it can last 10-15 years before significant rust appears, depending on local humidity and salt levels.

2.What are the typical applications for Z140 coating?

It is widely used for roofing sheets, warehouse wall panels, and agricultural equipment where a balance between cost and durability is required.

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.