AZ150 Galvanized Steel Coil: Advanced 55% Al-Zn Coating for Extreme Corrosion Resistance
AZ150 Galvanized Steel Coil Product Overview
AZ150 Galvanized Steel Coil is a hot-dip aluminum-zinc alloy-coated steel engineered for harsh industrial and coastal environments. With a 55% aluminum, 43.4% zinc, and 1.6% silicon coating, it delivers 3–5x longer corrosion resistance than standard galvanized steel. The unique dual-phase microstructure—composed of an aluminum-rich skeleton (75% volume) and zinc-aluminum eutectic (25%)—provides self-healing edge protection, ensuring durability even when exposed to scratches or trimmed edges. Compliant with ASTM A792, EN 10346, and JIS G3321, it is ideal for roofing, automotive components, and structural applications requiring high strength (550 MPa tensile) and thermal reflectivity (80%).
Technical Specifications
1. Coating & Dimensions
- Coating Weight: 30–185 g/m² (adjustable per application)
- AZ150 Standard: 150 g/m² (36 μm total thickness, 18 μm per side)
- Base Steel Thickness: 0.12–6.00 mm (±5% tolerance)
- Width: 600–1,500 mm (custom slit for HVAC, automotive panels)
- Length: 1–12 m (coil or cut-to-length sheets)
2. Chemical Composition
| Element | Al (%) | Zn (%) | Si (%) | Fe (%) | Trace Elements (max) |
|---|---|---|---|---|---|
| Content | 55–58 | 41–43 | 1.5–2 | ≤0.25 | Pb:0.05, Cr:0.05, Ni:0.05 |
Coating Advantages:
- Salt Spray Resistance: 3,000+ hours (ASTM B117) without red rust.
- Thermal Reflectivity: 80% (vs. 20% for galvanized steel), reducing rooftop temps by 10–15°C.
- Self-Healing Mechanism: Zinc ions migrate to exposed edges, forming a protective layer.
Mechanical Properties
| Grade (EN 10346) | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Hardness (HV) |
|---|---|---|---|---|
| DX51D+AZ | 240–380 | 270–500 | ≥22 | 85–125 |
| S250GD+AZ | ≥250 | ≥330 | ≥19 | 100–140 |
| S350GD+AZ | ≥350 | ≥420 | ≥16 | 120–160 |
| S550GD+AZ | ≥550 | ≥550 | – | 180–220 |
Key Performance Metrics:
- Bendability: 0T–2T (180° bend @ 0.5 mm thickness).
- Weldability: 8–12 kA spot welding current (20% lower energy than galvanized steel).
- Punching Force: ≤50 kN for 2 mm sheets.
Surface Treatment Options
| Coating Type | Surface Finish | Applications |
|---|---|---|
| Zero Spangle (Z) | Smooth, reflective | Architectural façades, solar panels |
| Minimized Spangle (M) | Matte, low glare | Automotive interiors, appliances |
| Anti-Fingerprint (N5) | Chromate-free, textured | Electronics, medical equipment |
Environmental Compliance:
- RoHS Certified: Chromium-free passivation (EN 10346-C5).
- Recycled Content: ≥30% (ISO 14021 verified).
Applications
| Industry | Use Case | Recommended Grade |
|---|---|---|
| Construction | Coastal roofing, cladding | S350GD+AZ (150 g/m² coating) |
| Automotive | Exhaust systems, truck frames | S550GD+AZ (100 g/m² coating) |
| Energy | Solar panel backing, ducts | DX51D+AZ (50 g/m² coating) |
| Agriculture | Grain silos, livestock roofing | S250GD+AZ (75 g/m² coating) |
Global Standard Equivalents
| China (GB) | Europe (EN) | USA (ASTM) | Japan (JIS) |
|---|---|---|---|
| DC51D+AZ | DX51D+AZ | CS Type B | SGCC |
| S350GD+AZ | S350GD+AZ | SS345 | SGLC490 |
| S550GD+AZ | S550GD+AZ | SS550 | SGLC570 |
Sustainability & Certifications
- Carbon Footprint: ≤1.5 tons CO₂ per ton of steel (ISO 14064).
- Lifespan: 25–30 years in coastal environments (ISO 12944 C5-M).
- Certifications: LEED v4.1, GreenGuard Gold (low VOC).
Packing And Delivery
