Steel vs Aluminium What is Best for a Car?

Since the invention of the automobile, body materials ranging from steel, iron and other metals to plastics, composite materials, and even wood have been moved for positioning as the main structural material of the vehicle.

Recently, aluminum has appeared more and more in the news of the automotive industry, positioning itself as the material of choice for advanced vehicles in the next generation, from electric cars to trucks.

Currently, the selection of materials is becoming increasingly a consideration for car buyers and builders alike, then the question arises: What material is better?


The stainless steels are iron alloys are characterized, in addition to the typical mechanical properties of carbon steels, by remarkable resistance to corrosion, especially in moist air or in freshwater.


Perlman is the trade name of a series of aluminum alloys in which the main alloy element is magnesium present in percentages up to 5.6%. Magnesium gives these alloys excellent characteristics of resistance to corrosion, even in the marine environment, good characteristics of weldability and excellent ductility.

Fight for lightweight is aluminum lighter?

The aluminum industry says yes, pointing to automakers such as Tesla and Ford, which choose Aluminum Foam to translate weight savings into battery capacity or payload. However, the tensile strength of steel is up to four times stronger than aluminum alloys, of the strongest available today.

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Fight for safety:-

SAF Aluminum body vehicles are safer than their steel counterparts thanks to better energy absorption, larger collision zones that fold more predictably and a larger overall size.

Point for aluminum:

  • Fight for sustainability
  • The steel has the advantage of being the world ‘s most recycled material. The steel recycling process is simpler too: its ferrous property allows easy sorting of the scrap and all the steel alloys can be melted together and mixed to produce any steel alloy. Aluminum, on the other hand, is more expensive to recycle, requiring different grades to separate before melting to preserve grades.

Point for steel:

  • Fight for workability
  • While some grades of steel can be a challenge to work with, steel is widely known for its higher performance and ductility than aluminum alloys. An easy example: The Cadillac body design would not be possible with aluminum, due to the lower ductility of the material. Aluminum has a smaller elongation, which is an indication of formability.


Car manufacturers are in two development paths, on the one hand with efficiency guidelines that push for lighter vehicles and other safety guidelines for stronger, stiffer and larger vehicles. This could explain the recent boost to aluminum, which can meet these requirements but has also ignited a fire in the steel industry to create alloys that can compete and outperform other materials. But when it comes to the question of whether steel will ever be dismantled as the king of body materials, it is clear that at the moment it does not.

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