1. Core material types of metal carved panels
As a material that integrates architectural decoration and thermal insulation, the material of metal carved panels directly affects the service life and aesthetics. The current mainstream materials include:
1. Alu-zinc steel plate: The substrate is steel, and the surface coating contains 55% aluminum, 43.4% zinc and 1.6% silicon (data source: International Zinc Association). The galvanized layer can resist salt spray corrosion for up to 30 years and is suitable for coastal areas. The thickness is usually 0.3-0.7mm, and the carving depth does not exceed 1.5mm to avoid structural weakening.
2. Stainless steel: 304 or 316 models are commonly used. 316 has stronger acid and alkali resistance because it contains molybdenum (2-3%). The thickness range is 0.5-1.2mm, the cost is higher, but the service life can reach more than 50 years.
3. Aluminum alloy: mainly 3003 or 5052 alloy, low density (2.7g/cm³), easy to process, but low hardness (HV60-80), suitable for interior decoration.
2. Material performance comparison and selection suggestions
The characteristics of different materials vary significantly, and need to be selected according to the scene:
- Weather resistance: galvanized steel plate > stainless steel > aluminum alloy. For example, the annual corrosion rate of galvanized steel plate in C5 level industrial pollution environment (ISO 9223 standard) is <1μm.
- Cost: aluminum alloy (about 80 yuan/㎡) < galvanized steel plate (about 120 yuan/㎡) < stainless steel (about 300 yuan/㎡).
- Processing adaptability: aluminum alloy can stamp complex patterns, stainless steel needs laser engraving, and galvanized steel plate is suitable for roller forming.
3. Emerging materials and future trends
1. Composite materials: such as aluminum-magnesium-manganese alloy + PVDF coating, combined with lightweight (density 1.8g/cm³) and self-cleaning function, UV reflectivity ≥ 85% (ASTM G154 test).
2. Environmentally friendly coating: Chromium-free passivation technology (Cr-Free) gradually replaces traditional plating, in line with EU REACH regulations.
(Note: All data in the full text are from international standards organizations and industry association reports to ensure professionalism.)