DX51D+AZ (also known as Galvalume or Al-Zn coated steel) is a commercial quality cold-rolled steel with a hot-dip Aluminum-Zinc alloy coating (typically 55% Al, 43.4% Zn, 1.6% Si). Defined by EN 10346, this coating provides 2 to 6 times better corrosion resistance and heat reflectivity than traditional pure zinc (GI) coatings. It is the ideal material for long-term outdoor construction, roofing, and appliances.
Chemical Composition (Base Metal)
Typical chemical composition (% by mass) per EN 10346.
| Grade | C (%) | Si (%) | Mn (%) | P (%) | S (%) |
|---|---|---|---|---|---|
| DX51D+AZ | ≤0.18 | ≤0.50 | ≤0.70 | ≤0.120 | ≤0.045 |
Note: The “+AZ” indicates an Aluminum-Zinc alloy coating. The base metal (DX51D) is commercial quality. Coating weights (e.g., AZ100, AZ150) determine the lifespan and corrosion resistance.
Mechanical Properties
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Coating Weight (Typical) |
|---|---|---|---|---|
| DX51D+AZ | 140–300 | 270–500 | ≥22 | AZ100 – AZ150 |
Available Sizes & Delivery
| Thickness | 0.3–2.0 mm |
| Width | 600–1500 mm |
| Coating Weight | AZ100 – AZ150 (g/m² both sides) |
| Surface Treatment | Chromated, Oiled, Anti-fingerprint (AFP) |
| Forms Available | Al-Zn coated coil (GL), cut-to-length sheet |
| Standard | EN 10346 / ASTM A792 |
| Mill Test Certificate | EN 10204 3.1 with every shipment |
| MOQ | 5 Tons |
| Delivery Time | Within 10-15 days (≤1000 tons) |
Why Order from Zhongtang Steel?
- Superior Corrosion Resistance — 2-6 times longer lifespan than pure zinc (GI) coatings
- Excellent Heat Reflectivity — Ideal for roofing and high-temperature applications
- EN 10204 3.1 MTC supplied with every shipment
- ISO 9001 certified manufacturer since 1998
- Mill-direct pricing — no trading company markup
Applications
- Roofing and wall cladding for industrial and residential buildings
- Home appliances — ovens, refrigerators, washing machines
- Automotive exhaust systems and underbody parts
- HVAC ductwork and agricultural equipment
- Solar panel mounting structures
- Base material for PPGL (color-coated Al-Zn coils)
Values are typical reference ranges per EN 10346. Actual properties may vary by mill and production route. Mill test certificates (EN 10204 3.1) are supplied with every shipment — contact us for exact data sheets.
