Aluminum alloys offer superior heat dissipation and aesthetic appeal compared to plastic materials, along with a premium weight feel that plastic cannot replicate.
1. Material Differences

    Die-cast aluminum: Typically uses ADC12 or AlSi9Cu3.

    Machined aluminum (wrought aluminum): Commonly 6063 or 6061.

2. Appearance & Formability

    Die-cast aluminum: Similar to plastic injection molding—complex, intricate shapes possible (e.g., streetlight housings).

    Machined aluminum: Limited to uniform cross-sections (e.g., heat sinks for bulbs, aluminum profiles for doors/windows).

3. Thermal Conductivity

    Die-cast aluminum: ~80–90 W/m·K

    Machined aluminum: ~180–190 W/m·K (better for heat dissipation)

4. Cost Comparison

    Both are priced by weight & machining complexity.

    Die-casting is generally more expensive due to mold costs, but high-volume production reduces per-unit cost.

    Machining costs depend on CNC time & material waste.

5. Production Efficiency

    Die-casting: Highly efficient for mass production (e.g., 1,000+ parts/day), with low shrinkage (0.5%) and consistent dimensions.

    Machined aluminum: Slower, as each part requires CNC milling/turning.

6. Applications

    Die-cast aluminum:

        Automotive parts (e.g., engine components)

        LED streetlights & smartphone frames

    Machined (wrought) aluminum:

        LED downlights, ceiling lamps

        Door/window profiles, heat sinks