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What are the commonly used metal materials in street lamp manufacturing?

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:  



1. Hot-Dip Galvanized Steel

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.




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