Common materials for transformer radiators include aluminum alloy, copper, stainless steel, and carbon steel (Q235). Different materials have their own advantages and disadvantages in terms of thermal conductivity, weight, corrosion resistance, and cost. The choice must be made comprehensively based on the transformer type, operating environment, and economic considerations.
Aluminum Alloy: The mainstream choice, balancing performance and cost.
Advantages: Low density, lightweight (only 1/3 the weight of copper), good thermal conductivity (approximately 200 W/m·K), strong resistance to atmospheric corrosion, suitable for large-scale applications.
Application Scenarios: Widely used in plate radiators, especially suitable for outdoor substations, wind power/photovoltaic booster stations, and other applications with high requirements for lightweighting and corrosion resistance.
Process Characteristics: Often uses extrusion molding + anodizing treatment to improve surface hardness and weather resistance.
Copper: High thermal conductivity but high cost, used in special scenarios.
Advantages: Excellent thermal conductivity (approximately 400 W/m·K), high mechanical strength, good fatigue resistance, suitable for high-frequency thermal cycling conditions.
Disadvantages: Expensive, high density (increasing overall weight), susceptible to sulfide corrosion.
Applications: Primarily used in heat dissipation components for high-reliability equipment such as high-frequency transformers or military and rail transportation equipment.
Stainless Steel: Strong corrosion resistance, used in harsh environments.
Advantages: Resistant to chloride ion corrosion, strong rust prevention, suitable for coastal areas, chemical plants, and other areas with high salt spray or pollution.
Disadvantages: Poor thermal conductivity (approximately 15–20 W/m·K), requiring compensation by increasing the heat dissipation area.
Common models: 304, 316L stainless steel, mostly used in liquid cooling systems or enclosed heat dissipation devices with an IP65 or higher protection rating.
