The choice of door panel material affects durability, aesthetics, weight, and cost. This article compares stainless steel and aluminum alloy as the two primary materials for electric telescopic door panels.
1. Stainless Steel Panels
Stainless steel doors use 201 or 304 grade stainless steel sheets. 201 stainless steel is more affordable but offers moderate corrosion resistance, suitable for inland areas with low humidity. 304 stainless steel provides superior corrosion resistance for coastal areas or industrial environments with salt exposure. The typical thickness ranges from 0.4mm to 0.8mm per panel. Stainless steel panels provide excellent impact resistance and a premium aesthetic appearance that many commercial and high-end residential installations prefer.
2. Aluminum Alloy Panels
Aluminum alloy panels use 6063-T5 architectural aluminum alloy, which offers excellent corrosion resistance due to aluminum's natural oxide film. Aluminum is approximately one-third the weight of steel, reducing the load on motors and drive systems. This weight advantage allows for larger door configurations with the same motor power. Aluminum panels are easier to form into aerodynamic shapes and accept powder coating in a wide range of colors for aesthetic customization.
3. Weight Comparison
Steel panels weigh approximately 4-6 kg per square meter per millimeter of thickness, while aluminum panels weigh only 2.7 kg per square meter per millimeter. For a typical 10-panel door covering a 6-meter opening, steel construction adds 150-250 kg to the total assembly weight compared to aluminum. This weight difference directly impacts motor selection, energy consumption, and wear on mechanical components.
4. Cost Analysis
Aluminum alloy panels cost approximately 15-25% more than equivalent steel panels due to raw material price differences. However, the reduced motor requirements and longer component lifespan often offset the initial premium over a 5-10 year period. For budget-conscious projects, steel doors with proper hot-dip galvanization and powder coating provide adequate performance at a lower initial cost.
This article compiles information from publicly available automatic door industry resources.