Non-ferrous metals, which are metals that do not contain iron as a primary component, have several characteristics that make them less suitable for structural work compared to ferrous metals (those that contain iron). Here are a few reasons:
Lower strength: Non-ferrous metals generally have lower tensile and compressive strength compared to ferrous metals. They are often softer and less rigid, which means they have lower load-bearing capabilities. This makes them less suitable for applications that require high strength and structural stability.
Lower melting points: Many non-ferrous metals have lower melting points than ferrous metals. This can be problematic in structural applications where high temperatures may be encountered, such as in fire situations. Non-ferrous metals are more prone to deformation, melting, or weakening at elevated temperatures, which compromises their structural integrity.
Corrosion susceptibility: Some non-ferrous metals, such as aluminum and copper, are more susceptible to corrosion than ferrous metals like steel. Structural components made from non-ferrous metals may require additional protective coatings or treatments to prevent corrosion, which adds complexity and cost to the construction process.
Cost: Non-ferrous metals, especially those like aluminum and copper, tend to be more expensive than ferrous metals. This higher cost can be a deterrent in large-scale structural projects where cost-effectiveness is a significant factor.
Despite these limitations, non-ferrous metals have their own unique advantages and are widely used in various other applications, such as electrical wiring, plumbing, aerospace, and automotive industries, where their specific properties are more desirable. However, for heavy-duty structural work that requires high strength, rigidity, and cost-effectiveness, ferrous metals like steel are generally preferred.