FRP vs Steel vs Aluminum in OEM Manufacturing
Article
Choosing between steel, aluminum and FRP/GRP composites is one of the first decisions engineering and procurement teams face when designing a new component. At Wentech Composites, we work with all three material families across automotive, recreational vehicle and infrastructure projects — so we see firsthand where each one earns its place.
Weight and Handling
FRP/GRP components are typically 30-60% lighter than equivalent steel parts. On large enclosures and covers — the kind we produce for motorhome manufacturers — this difference shows up directly in transport costs, assembly time on the production line, and how many people are needed to handle a single part.
Corrosion Resistance
Composites do not corrode. This matters most for parts exposed to weather, road salt or industrial chemicals — which is exactly why we produce components such as roadside safety columns and outdoor housings where steel would require ongoing maintenance and aluminum would still need surface protection.
Design Flexibility
Complex curves and integrated structural shapes that would require expensive tooling or multi-part assembly in metal can often be molded as a single composite piece. This is one of the reasons OEM customers come to us mid-project, after running into geometry limitations with metal suppliers.
Maintenance and Lifecycle
FRP components generally require less maintenance over their service life and hold up well in harsh outdoor conditions — relevant for any part that stays in the field for years without scheduled servicing.
When Composites Are the Better Choice
Composites tend to make the most sense when corrosion resistance is critical, weight reduction matters, the geometry is complex, or production volumes sit in the prototype-to-mid-series range rather than full automotive scale.
Conclusion
There is no universally “better” material — the right choice depends on the application, volume and environment. If you’re weighing options for a specific part, our team can walk through the trade-offs based on your actual drawings and requirements.
