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What Does Aluminum Do to The Car Body

A basic advantage of aluminum alloys over steel is that they are lighter. Why are aluminum alloys lighter? Because the density of aluminum is relatively small, the density of aluminum alloy materials is 2.5-2.8g/cm3, while the density of steel is 7.8-8.7 g/cm3. With the same volume, the weight of aluminum alloy is only 35-40% of steel, which can limit the weight of the car body.

Of course, for industrial materials, density and lightness are only one aspect. The advantage of the automotive aluminum is that its strength is relatively high, close to or exceeding that of high-quality steel. It has good plasticity, can be processed into various profiles, and has excellent electrical conductivity, thermal conductivity and corrosion resistance.

Deformed aluminum alloy refers to automotive aluminum sheets, extruded profiles and forged materials. It is mainly used in automobiles for body panels, body frames, engine radiators, air conditioning condensers, evaporators, wheels, decorative parts and suspension system parts.


Due to the obvious lightweight effect, the application of aluminum alloys in car bodies is expanding. For example, the entire NSX uses 31.3% aluminum. For the all-aluminum body, the outer panels use 6000 series alloy, the inner panels use 5052-O aluminum and most of the frame uses Al5182.

5182 aluminum sheet belongs to the aluminum-magnesium alloy aluminum plate. Generally, this series is used for automobile parts and automobile door panels. It has good corrosion resistance, good cold workability and medium strength. The main alloying element of 5182 is magnesium, and a small amount of silicon is added, so the welding performance of gas welding, argon arc welding, spot welding and seam welding of 5182 aluminum plates is very good.

5182 aluminum properties

1. The welding performance of gas welding, argon arc welding, spot welding and seam welding is very good.

2. Good machinability. The surface is beautiful after anodizing.

3. This alloy has high strength, especially fatigue resistance.

4. It cannot be strengthened by heat treatment. The plasticity is good during semi-cold work hardening, but the plasticity is low during cold work hardening.

6014 aluminum is a heat-treatable strengthenable alloy with good formability and machinability. It also has medium strength and can still maintain good operability after annealing. Its main alloying elements are magnesium and silicon, which form the Mg2Si phase. Mg2Si is solid dissolved in aluminum, giving the alloy artificial age hardening properties.

6014-t651 is a main temper of the AA6014. Although its strength cannot be compared with that of 2XXX series or 7XXX series, it has excellent features such as processability, excellent characteristics and plating properties, good corrosion resistance, high toughness and no deformation after processing, dense material and easy polishing, easy coloring film, and oxidation effect.

Original Source:https://www.autoaluminumsheet.com/a/what-does-aluminum-do-to-the-car-body.html

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