Hot-Dip Aluminum Coated Steel Coil / Sheet / Plate | ASTM A463, EN 10346
Huaxiao-Alloy’s Hot-Dip Aluminum Coating transforms carbon steel into an ultra-durable hybrid material that outperforms traditional galvanized steel 3-5x in extreme heat (≤800°C) and corrosive environments. By fusing steel with aluminum-silicon or pure-aluminum layers, we deliver solutions for industries where failure is not an option.
1. PRODUCT SPECIFICATIONS
Standard Dimensions & Tolerances
| Form | Thickness | Width | Coating Mass (g/m²) | Surface Finish |
|---|---|---|---|---|
| Coil | 0.3–3.0 mm (±0.03mm) | 600–1,600 mm (±0.8mm) | 75/100/150/200 | Regular (R), Minimized spangle (M) |
| Sheet | 0.5–4.0 mm (±0.05mm) | 1,000–2,000 mm (±1mm) | 100/150/200 | Skin-passed (S), Bright finish |
| Plate | 3–25 mm (±0.5%) | 1,500–3,500 mm | 150/200 | Pickled & oiled (PO), Blasted |
2. BASE MATERIAL OPTIONS
(Tailored for Mechanical Performance & Compatibility)
| Steel Grade | Standard | Yield (MPa) | Tensile (MPa) | Use Case |
|---|---|---|---|---|
| DC01 | EN 10130 | 140–210 | 270–350 | Agricultural tanks |
| HCT450X | EN 10346 | ≥220 | ≥450 | Automotive exhausts |
| S320GD+AS | EN 10346 | 320–420 | 320–470 | Solar mounting structures |
| DP600 | ASTM A1085 | 340–440 | 600–730 | Battery enclosures |
3. COATING SYSTEMS: TECHNOLOGY & PERFORMANCE
Type 1 (AlSi Alloy Coating)
- Composition: Al 86-89% + Si 6.5-8.5%
- Structure: FeAl₃ + Fe₂Al₅ + β-Si eutectic (5-18µm)
- Key Attributes:
- Max service temp: 650°C continuous, 800°C peak
- Salt spray resistance: 1,500–2,500 hrs (ASTM B117)
- Heat reflectivity: 85% (vs. 35% for HDG)
Type 2 (Pure Aluminum Coating)
- Composition: Al ≥99% + trace Fe
- Structure: Pure Al overlay + Fe₂Al₅ layer (15-40µm)
- Key Attributes:
- Acid corrosion resistance: 0.05 mm/year in 10% HCl
- Formability: LDR 1.6 (ISO 12004-2)
- UV stability: Zero degradation after 10 years outdoor exposure
4. MECHANICAL & PHYSICAL PROPERTIES
| Property | Test Method | Type 1 Value | Type 2 Value |
|---|---|---|---|
| Adhesion (T-Bend) | ISO 16273 | 1T | 0T |
| Thermal Expansion | ASTM E228 | 11.5 µm/m·°C (20-600°C) | 12.8 µm/m·°C |
| Microhardness (Coating) | ISO 6507-1 (HV0.1) | 180–220 HV | 25–35 HV |
| Electrical Resistivity | ASTM B193 | 10 µΩ·cm | 3 µΩ·cm |
5. INDUSTRY APPLICATIONS
| Sector | Component | Recommended Grade | Huaxiao Solution |
|---|---|---|---|
| Automotive | Exhaust manifolds | AT1100HD (AlSi 150g/m²) | VW TL267 certified, 900°C cyclic |
| Energy | Biomass boiler tubes | AH172X (AlSi 172g/m²) | Flue gas dew point corrosion <0.1mm/yr |
| Construction | Agro-chemical storage | AP-410P (Pure Al 200g/m²) | Resists NH₃/H₂S vapors |
| HVAC | Heat exchanger fins | AF-85S (AlSi 85g/m²) | Compatible with Al brazing (600°C) |
FAQ: ENGINEERING-CRITICAL QUERIES
A: At >500°C, Si oxidizes into SiO₂, creating a self-healing barrier against O₂ diffusion (per ISO 2740). Our 7.5% Si optimizes this.
A: Yes – use ER309L filler with 95Ar/5H₂ gas. Preheat ≤150°C prevents Al-contaminated cracks.
A: 1) Zinc-rich epoxy (70µm) | 2) Laser-sealed edges | 3) Huaxiao’s proprietary Zn-Ni flash coating.
A: 20 MT for Type 1, 15 MT for Type 2 – with ±7g/m² tolerance guaranteed.
A: ALUM150 offers superior heat resistance (>650°C vs. 400°C) while Galvalume excels in cut-edge corrosion.
A: Full ASME SB263 compliance – Includes hydrostatic test reports & NDE documentation.
ADDITIONAL ENGINEERING SUPPORT
Technical Documentation Library
- Coating Selection Guide (Temp/Corrosion Matrix)
- Welding Procedure Specifications (AWS D8.7-compliant)
- Lifecycle Cost Calculator vs. Stainless/Galvanized
Value-Added Services
- Prototype Stamping: Test runs on 1,200-ton press
- Corrosion Mapping: Predictive modeling per ISO 20340
- ESG Reporting: CO₂ savings per ton vs. alternatives
- Deep Technical Credibility: Microscopic layer specs, validated test data
- Solution-Focused Positioning: Match steel grade + coating + processing for use cases
- Risk Mitigation: Certifications, 3rd-party reports, field performance data
- Conversion-Driven CTAs: Samples → Testing → Engineering support flow
- Competitive Defense: Explicit comparisons vs. alternatives (Galvalume/SS)
Hot-Dip Aluminum Coated Steel Coil / Sheet / Plate
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