Al-Mg-Mn Alloy AA3004 Coloured Aluminium Sheet For Curved Curtain Wall
Al-Mg-Mn Alloy AA3004 Coloured Aluminium Sheet For Curved Curtain Wall
AA3004 series alloy demonstrates moderate-to-high mechanical strength with outstanding corrosion
resistance, particularly against atmospheric conditions. It performs exceptionally well in humid and
saline environments. The material offers excellent processing characteristics including cold-forming
capability, weldability, and surface treatment adaptability.
Primarily used for:
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Curtain walls (weather-resistant, UV-proof)
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Roofing systems (lightweight, corrosion-resistant)
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Architectural decoration (versatile colors/finishes, easy fabrication)
Standard Specifications
| Parameter | Specification | Notes |
| Thickness | 1.5-3.0mm | Thinner (<1.5mm) may deform; thicker (>3.0mm) complicates complex shaping |
| Temper | H34/H44 | H34 (half-hard): balances strength/formability; H44: better corrosion resistance |
| Surface Finish | PVDF fluorocarbon coating (2-coat system) | Must meet ASTM D7863 for 25+ year color retention |
| Elongation | ≥10% (H34 temper) | Ensures crack-free cold bending for complex curves |
Key Characteristics of 3004 Aluminum Coil
3004 is an Al-Mn-Mg series alloy (typically supplied in H34/H44 tempers) that, when color-coated,
exhibits:
Mechanical Properties
Tensile strength: 180-240 MPa (H34 temper reaches ≥240 MPa)
Elongation: ≥8% (H34), excellent for stamping and forming
Corrosion Resistance
Mn and Mg elements enhance atmospheric/rain corrosion resistance
Formability
Excellent bendability and deep-drawing capability for complex facade shapes
Performance Advantages for Double-Curved Facades
♦ Formability
High ductility (Mn/Mg alloying) enables cold bending for radii ≥1.5m (requires specialized roll-forming
equipment).
♦ Lightweight & Cost-Effective
1/3 the weight of glass facades, reducing structural costs with 30% faster installation.
♦ Aesthetic Flexibility
Custom PVDF colors (metallic, woodgrain effects) with UV resistance (ΔE<3 after 15 years)
♦ Weather Resistance
Stable performance across -40℃ to 80℃ with no cracking/deformation
♦ Cost Efficiency
Lower lifecycle cost vs stainless steel/zinc; minimal maintenance (cleaning only)
Comparison with Other Curved Facade Materials
| Material | Minimum Curve Radius | Weathering | Maintenance |
| 3004 Aluminum | ≥1.5m | Excellent (PVDF) | Low (self-cleaning) |
| Stainless Steel | ≥3m | Outstanding | Moderate (smudging) |
Notable Project Applications
✅ Skyscrapers: Shanghai World Financial Center (decorative elements)
✅ Airports: Beijing Daxing Airport (curved sunshades)
✅ Commercial Complexes: Parametric facade systems
Company Advantages
Advanced Equipment
• German SMS Group fully automated coating lines with ±0.01mm thickness precision,
Line Speed: 120m/min (20% faster than industry average data)
• MES system enables real-time production monitoring with ≥99.3% product qualification rate
• Multi-spectral imaging detects micro-defects as small as 0.02mm² with 99.8% recognition accuracy
Technology Patents
♦ Anti-Static Color Aluminum Coil and Continuous Production System
♦ Chromium-Free Passivation Solution for Color-Coated Aluminum Coils and Preparation Method
♦ Production Process for High Solar-Reflectance Color Aluminum Coils
♦ Method for Preparing 3D Wood Grain Aluminum Coil Based on Nanoimprint Technology
♦ Low-Temperature Curing Technology
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