What are the differences in thermal expansion between aluminum and stainless steel outdoor armchairs?

When choosing outdoor armchairs, understanding the thermal expansion properties of aluminum and stainless steel is crucial for long-term durability and comfort. Aluminum has a higher coefficient of thermal expansion (23.1 x 10^-6/°C) compared to stainless steel (16-18 x 10^-6/°C), meaning it expands and contracts more with temperature changes. This makes aluminum more prone to warping or loosening joints in extreme weather, while stainless steel remains more stable. However, aluminum's lighter weight and corrosion resistance often make it a popular choice despite this drawback. For high-heat environments, stainless steel's lower thermal expansion provides better structural integrity over time. Consider your climate and usage needs when selecting between these two metals for outdoor furniture.