Products Description
DC53D+AZ Galvalume Steel Coil is a high-performance hot-dip aluminum-zinc alloy coated steel product, engineered with a deep-drawing cold-rolled substrate (DC53D) and a 55% Al-43.4% Zn-1.6% Si alloy coating (+AZ). It delivers exceptional formability, superior corrosion resistance, and excellent heat reflectivity, making it the ideal material for automotive, home appliance, construction, and renewable energy applications. As a top-grade Galvalume steel coil, it outperforms traditional galvanized steel in durability and cost-effectiveness, serving as a preferred choice for global buyers seeking reliable coated steel solutions.
Key Advantages of DC53D+AZ Galvalume Steel Coil
1. Unmatched Corrosion Resistance
The 55% aluminum-zinc-silicon alloy coating forms a dense quaternary crystal structure, combining aluminum's barrier protection and zinc's sacrificial anode effect. It withstands 1500+ hours of salt spray testing, with a service life 3–8 times longer than conventional galvanized steel, even in harsh marine, industrial, or humid environments.
2. Exceptional Formability for Complex Processing
DC53D substrate features high ductility (elongation ≥30%) and low yield strength (140–260 MPa), enabling seamless deep drawing, stamping, bending, and welding without cracking. It is perfect for manufacturing complex components like automotive body panels, appliance housings, and architectural parts.
3. Excellent Heat Resistance & Reflectivity
Withstands continuous high temperatures up to 315°C without coating peeling or discoloration, ideal for heat-generating components like oven parts and solar panel frames. Its silver-white surface reflects 80%+ of solar radiation, reducing building energy consumption and enhancing sustainability.
4. Superior Surface Quality & Aesthetics
Smooth, flat surface with a gorgeous star-like spangle and bright silver-white finish, requiring minimal surface treatment. Supports anti-fingerprint, chromated, and non-chromate passivation treatments for enhanced durability and appearance.
5. Cost-Effective & Sustainable
Fully recyclable, reducing carbon footprint and aligning with global environmental standards. Long service life (up to 25 years) minimizes maintenance and replacement costs, delivering excellent total cost of ownership.
Technical Specifications of DC53D+AZ Galvalume Steel Coil
| Parameter | Specification |
|---|---|
| Steel Grade | DC53D+AZ (EN 10346, ASTM A792M, JIS G 3321) |
| Coating Composition | 55% Al, 43.4% Zn, 1.6% Si |
| Thickness | 0.2–2.5 mm (customizable) |
| Width | 900–1250 mm (customizable: 600–1500 mm) |
| Coating Mass | 40–150 g/m² (both sides total) |
| Yield Strength (ReL) | 140–260 MPa |
| Tensile Strength (Rm) | 270–380 MPa |
| Elongation (A80mm) | ≥30% |
| Surface Finish | Regular spangle, minimized spangle, skin-passed |
| Surface Treatment | Chromated, non-chromated, anti-fingerprint, oiled/dry |
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Surface Finish
Applications of DC53D+AZ Galvalume Steel Coil
Automotive Industry: Body panels, chassis parts, door panels, fuel tanks, and structural components.
Home Appliances: Air conditioner casings, refrigerator back panels, oven parts, and electronic device housings.
Construction: Roofing sheets, wall panels, ceiling panels, roller shutters, and architectural decorations.
Renewable Energy: Solar panel frames, wind turbine components, and energy storage system parts.
Agriculture & Industry: Warehouse panels, barns, silos, and industrial equipment casings.
Aluzinc Coating Specification Chart
| Coating Code | Total Coating Weight | Total Coating Thickness | Approx. Single Side Thickness(μm) | Applicable Standards |
| (g/m², both sides) | (μm, theoretical) | |||
| AZ50 | 50 | 13.16 | 6.58 | GB/T 14978, EN 10346, ASTM A792 |
| AZ70 | 70 | 18.42 | 9.21 | GB/T 14978, EN 10346, ASTM A792 |
| AZ100 | 100 | 26.32 | 13.16 | GB/T 14978, EN 10346, ASTM A792 |
| AZ150 | 150 | 39.47 | 19.74 | GB/T 14978, EN 10346, ASTM A792 |
| AZ180 | 180 | 47.37 | 23.68 | GB/T 14978, EN 10346, ASTM A792 |
| AZ200 | 200 | 52.63 | 26.32 | GB/T 14978, EN 10346, ASTM |
Frequently Asked Questions (FAQ)
Q1: What does DC53D+AZ mean?
A1: DC53D refers to a deep-drawing grade cold-rolled steel substrate; +AZ stands for hot-dip aluminum-zinc alloy coating (55% Al, 43.4% Zn, 1.6% Si).
Q2: How does DC53D+AZ differ from galvanized steel (GI)?
A2: DC53D+AZ has better corrosion resistance (3–8x longer life), higher heat resistance (315°C vs. 200°C for GI), and superior formability for complex stamping.
Q3: What coating mass options are available?
A3: Standard coating mass ranges from 40–150 g/m² (both sides); custom coating masses are available upon request.
Q4: Can DC53D+AZ be painted or coated?
A4: Yes, it has excellent paint adhesion and can be directly painted or used as a substrate for color-coated steel (PPGI/PPGL).
Q5: What surface treatments are offered?
A5: Options include chromated (Cr3+/Cr6+), non-chromated, anti-fingerprint, slight oiled, or dry surface.
Q6: Is DC53D+AZ suitable for outdoor use?
A6: Absolutely. It resists UV radiation, rain, and salt spray, making it ideal for roofing, wall panels, and outdoor equipment.
Q7: What is the standard delivery length for coils?
A7: Standard coil inner diameter is 508 mm or 610 mm; coil weight ranges from 3–8 tons (customizable).
Q8: Does GNEE STEEL provide third-party inspection?
A8: Yes, we support SGS, TÜV, and other third-party quality inspections as required by customers.
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