![]() ![]() The cost of aluminum and steel is constantly in flux based on global supply and demand, related fuel costs, and the iron and bauxite ore market. This means that an aluminum vessel can be built at a given strength that is two-thirds the weight of a comparable steel boat. With that said, shape and structural rigidity can contribute significantly to the strength of a structure, and when those two factors are optimized, aluminum can provide similar reliability to a comparable steel structure at half the weight.įor example, there is a rule of thumb in boat building that aluminum is roughly half the strength of steel at one-third the weight. It weighs approximately 60 percent less than concrete, however, making it easier to transport and use in various construction and fabrication applications. Steel’s superior strength also comes with a weight/density that is 2.5 times that of aluminum. These resistant properties make it one of the most durable industrial materials. Steel is less likely to warp or bend from weight, force, or heat. While aluminum does increase in strength in colder environments, it is generally more prone to dents and scratches than steel. ![]() STRENGTHĭespite being at risk for corrosion, steel is still harder than aluminum. Steel is more rigid and will crack or rip if pushed too far during the spinning process. While steel is extremely durable and resilient, aluminum is considerably more flexible and elastic.Īluminum’s malleability and smooth fabrication allow it to form deep, intricate, and precise spinnings, giving handlers significant design freedom. Zinc is often used to protect against corrosion through the galvanizing process. Steel - or carbon (not stainless) steel, to be specific - typically needs to be painted after being spun in order to protect it from rust and corrosion. As a result, it requires no paint or other coating to keep it from rusting. But unlike iron oxide, aluminum oxide sticks to the metal, shielding it from decay. Here’s how they stack up: CORROSION RESISTANCEĪluminum oxidizes via the same type of chemical reaction that causes iron to rust. While both metals have countless uses, there are a few key factors that can help you determine which one is best for the job. Steel and aluminum are two of the most widely used materials on the planet.Īluminum is the second-most abundant metallic element on Earth after silicon, while steel is the world’s most popular alloy.
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