terials and if it’s expected to continue in the future?
A:
The use of lightweight materials has ramped up over the last decade. When I worked in a body shop in 2008, the incidents of aluminum in our facility were minimal. By the time I left in 2012, it was becoming more common. Looking at Mitchell data from our estimating customers, we see a
types of materials. Looking ahead, it is predicted that this trend will continue to evolve. A study conducted by IHS Markit showed that over the next 10 years, we’re going to see highstrength steels have higher percentage content in vehicles than mild steels. Higher tensile strength steels are fired at higher temperatures, which produces more rigidity, so the material is not only lighter, but also stronger.
Q: A: This Audi structure at the SCRS booth during SEMA consists of stamped and extruded aluminum with carbon fiber reinforcements. Credit: Tim Ronak
couple of percentage points growth every year in terms of the major component parts constructed of these
see a shift in the use of composite plastics. All these changes are likely to affect the repair versus replace decision-making process. Certain materials are simply going to create a different pattern of damage than steel. With some parts of the car comprised of ultra-high-strength steel, for example, a repair is prohibited
How is this shift expected to impact collision repairers?
As manufacturers continue to use more non-traditional materials, it will ultimately impact collision repairers. When Ford manufactured the all-aluminum F-150 in 2015, there was much discussion around the use of this material. As a result, some collision repairers have already set up their facilities to accommodate aluminum repair with a clean room and dedicated tools, dust evacuation systems, etc. In addition to aluminum and lightweight steel, I think we’ll also
A BMW i8 using carbon fiber. Credit: Tim Ronak
because it will ruin the vehicle’s structural integrity. Other parts, such as composite plastics and even carbon fiber, can be repairable in certain instances but this is rarer than if the panel was comprised of mild steel. The properties of the metal in
the vehicle dictate how it will respond in an accident. Because aluminum becomes more brittle when impacted, it’s more likely that it will crack versus deform. When mild steel is impacted, it dents. It deforms the energy and continues to travel through the rest of the car because that energy hasn’t been dispersed quickly enough. When you have something that cracks, that energy disperses much more efficiently. If you have a fender with a dent, it might be repairable; however, it probably can’t be fixed if it has a crack. Take the 2018 Audi A3. There’s an A3 with a gas engine and an Audi e-tron, the plug-in electric vehicle. With the gas engine version, the fenders are made of mild steel. The fenders on the plug-in version are aluminum. The front ends look identical and there is no difference cosmetically. However, when those cars are in an accident and subjected to impact, the fenders are going to respond very differently. There will be different patterns of damage simply due to the materials. That’s at the
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Regardless of the age of your customer’s Audi, Audi dealers have access to over 200,000 part numbers and are supported by a nationwide network of distribution centers to help ensure non-stocked parts are delivered the next day. autobodynews.com / OCTOBER 2021 AUTOBODY NEWS 51
