How does the surface hardness of aluminum compare to stainless steel in outdoor armchairs?

When choosing outdoor armchairs, material durability is a key factor. Aluminum and stainless steel are popular choices, but their surface hardness differs significantly.

Aluminum is lightweight and naturally corrosion-resistant, but its surface hardness is lower than stainless steel. It typically scores around 2.5-3 on the Mohs hardness scale, making it prone to scratches and dents over time. However, aluminum can be anodized or coated to improve its hardness and wear resistance.

Stainless steel, on the other hand, is much harder, ranging between 5-6 on the Mohs scale. This makes it more resistant to scratches and impacts, ideal for high-traffic outdoor settings. The chromium content in stainless steel also enhances its corrosion resistance.

For long-term durability, stainless steel outperforms aluminum in surface hardness. However, aluminum is lighter and often more cost-effective, making it suitable for less demanding environments. Consider your climate, usage, and maintenance preferences when selecting between these materials for outdoor armchairs.