As outdoor infrastructure, street lamps have high requirements for material weather resistance, strength, and cost control. The commonly used metal materials and their characteristics are as follows:
Application Scenarios:
Main structure components such as lamp poles, bases, and brackets, accounting for over 70% of usage. It is the most mainstream structural material for street lamps globally.
Core Advantages:
High Strength: Meets harsh outdoor requirements such as wind resistance (e.g., withstands Category 12 typhoons) and impact resistance;
Corrosion Resistance: Galvanized layer thickness≥85μm, service life up to 20-30 years, especially suitable for rainy and high-humidity regions;
Cost-Effective: High cost-performance ratio, suitable for large-scale industrial production, and meets the needs of bulk procurement in foreign trade orders.
2. Aluminum Alloy
Application Scenarios:
Lamp head casings, lightweight lamp poles, and special components for coastal/corrosive environments. Demand is rapidly growing in high-end markets in Europe and America.
Core Advantages:
Lightweight & High Strength: Density is only 1/3 that of steel, reducing transportation costs and facilitating installation;
Self-Protective Corrosion Resistance: A natural aluminum oxide protective film forms on the surface, eliminating the need for additional galvanizing. Ideal for high-corrosion environments such as coastal areas and chemical zones;
Design Flexibility: Complex shapes can be formed via die-casting/extrusion, meeting the personalized design needs of landscape street lamps.
3.Stainless Steel
Application Scenarios:
Decorative parts for high-end commercial street lamps (nameplates) and core components in extreme environments (e.g., polar regions, acid rain areas).
Core Advantages:
Superior Corrosion Resistance: 304/316 stainless steel offers excellent acid and alkali resistance, requiring no maintenance, with a service life of over 30 years;
Aesthetic & Durable: Surface can be mirror-finished or brushed, enhancing urban landscape quality and aligning with the needs of high-end projects in developed countries.
4. Copper
Application Scenarios:
Internal conductive systems (wires, terminal blocks) and decorative parts for retro-style street lamps (e.g., copper lamp covers, carvings).
Core Advantages:
Excellent Electrical Conductivity: Conductivity second only to silver, ensuring stable circuit performance and reducing failure risks;
Retro Aesthetics: Develops a unique patina appearance after oxidation, suitable for customized needs in historical districts and cultural tourism projects.
5. Cast Iron
Application Scenarios:
Traditional heavy-duty bases and brackets forRetro-style street lamp (still in demand for retro-style projects in Europe and America).
Characteristics:
High Hardness: Suitable for heavy loads, but high density (increased transportation costs) and prone to rust (requires regular painting maintenance), gradually being replaced by steel.
