There’s a lot that goes into choosing the right metal for the job: you need to think about its weight, strength, how easy it is to work with, and much more. If you choose a metal that doesn’t fit the bill, you might have to pay for costly replacements after it cracks or warps. In the worst-case scenario, it could even collapse completely, posing a real danger to the people and property around it.
One critical factor to consider is how your chosen metal will perform under the specific environmental conditions it will face. This is particularly important in environments subject to extreme heat or cold, where temperature fluctuations can have a significant impact on the performance, strength, and durability of materials.
Since 1994, MG Metals have supplied high-quality, custom-cut metal to people all across the UK. With decades of expertise, we provide tailored advice and solutions for industries ranging from construction to aerospace. In the comparison below, we delve into the heat and cold resistance of both steel and aluminium to help you determine the right material for your project.
Is Steel or Aluminium Better for Hot Temperatures?
Generally speaking, steel tends to be a better option for hot temperatures. This is mainly thanks to its high melting point – steel melts at around 1,370°C to 1,510°C, whereas aluminium melts at about 660°C.
The higher melting point of steel is due to factors like its greater atomic mass, strong metallic bonding, and more complex crystal structure. As a result, steel is commonly used in furnaces and engines in industries such as defence, oil, and gas. Its ability to retain strength at elevated temperatures also makes it a preferred material for structural components in high-temperature environments.
However, there’s one reason you may want to choose aluminium over steel in hot conditions: aluminium has much higher thermal conductivity. This means it transfers heat more efficiently, which can be useful in situations where effective heat dissipation is key. Applications such as heat exchangers, electronic enclosures, and cooling systems often benefit from aluminium’s excellent thermal properties.
Is Steel or Aluminium Better for Cold Temperatures?
If your structure is going to face more cold than heat, it’s generally a good idea to go with aluminium instead of steel. This is because aluminium doesn’t get as brittle as steel in lower temperatures, making it much longer lasting. Steel, particularly certain grades, can become prone to cracking under extreme cold due to reduced ductility and increased brittleness.
In fact, aluminium even becomes stronger in the cold – a phenomenon known as “cold working” or “cold deformation.” This occurs because of changes in the crystal structure, reduced thermal activation of atoms, and a more refined grain structure. The enhanced strength and resilience of aluminium at low temperatures make it the material of choice for cryogenic applications and cold storage facilities.
Aluminium’s cold resistance makes it a great choice for industries that are commonly working in low temperatures, such as the aerospace and marine sectors. For projects like offshore platforms or arctic structures, aluminium’s reliability under freezing conditions offers unmatched performance.
First-Rate Steel and Aluminium Components, Custom-Cut for Your Project
Looking to source metal for your next project? MG Metals have all the high-quality components you could possibly need, all custom cut to match your exact specifications! From bespoke designs to bulk orders, we ensure every piece meets your precise requirements.
We offer a wide selection of metals, including:
Whether you’re in need of a steel sheet or a brass bar, we’re here to deliver it to your location, exactly when you need it. Our fast delivery options and commitment to quality ensure your projects stay on track and within budget.
Not sure which metal is the best fit for your project? No worries. Our metal specialists have supplied steel and aluminium for projects of all sizes, from small-scale structures to massive multi-site builds, and are more than happy to provide advice on the best metal for your specific job. We’ll guide you through the selection process to guarantee optimal performance for your application.
If you’re ready to get started, you can get a quote online or call us on 01794 521070 today. Experience the MG Metals difference with expert advice, custom solutions, and metals you can trust.