Aluminium vs Steel vs Stainless Steel: Which Metal Do You Need?
There are a few factors that you need to consider when choosing the right metal for your project. Finding the correct diameter, length, finish, and material is crucial
There are a few factors that you need to consider when choosing the right metal for your project. Finding the correct diameter, length, finish, and material is crucial. The correct material is especially a factor that needs to be considered, because is can affect the strength, weight, durability, appearance, and how well it performs in different environments.
So in this blog, we'll compare the 3 main metal tube types and explore their advantages and disadvantages.
What is the difference between aluminium, steel, and stainless steel?
All 3 materials are used to manufacture metal hardware; however, each type offers different properties that make it suitable for applications.
For example:
- Aluminium is known for being lightweight and naturally corrosion-resistant.
- Steel is valued for its strength and versatility.
- Stainless steel offers strength alongside excellent resistance to corrosion.
So let's explore each material a little further.
Aluminium:
One of the biggest advantages of aluminium is its low density. It weighs around 1/3 as much as steel by volume, so it's useful for projects where keeping the overall weight down is important. The material forms a naturally protective oxide layer when exposed to air. This helps it resist corrosion, although its performance will depend on the alloy, finish, and surrounding environment. But what other benefits does it have?
- Lightweight
- Corrosion-resistant
- Easy to work with
- Versatile appearance
Where can it be used?
- Interior tubing / railing
- Lightweight storage projects
- Decorative fittings
Steel:
When strength and rigidity are high on your priority list, steel tubing is a popular choice. Steel is an iron-based alloy that offers excellent strength; its properties make it useful for everything from furniture components to structural applications. So in projects where supporting loads is important, steel is your choice. Let's look at more benefits:
- Strength and rigidity
- Versatility
- Durability
A closer look at galvanised steel:
Something important to consider with steel is that it isn't all corrosion-resistant meaning not all steel can be used outside. Ordinary steel can rust when exposed to moisture and oxygen, particularly if its protective coating becomes damaged. When browsing Rothley for our outdoor-applicable steel hardware, make sure the product is labelled as Galvanised Steel. This means it has a protective zinc coating that helps resist rust.
Where it can be used:
- Furniture frames
- Storage and hanging systems
- General-purpose DIY projects
- Interior fittings and fixtures
Stainless steel:
Although stainless steel is a type of steel, it has still got a difference in comparison to regular steel. As we mentioned previously, most steel products aren't corrosion-resistant because they have no/little protective coating.
But stainless steel includes chromium, which helps form a protective surface layer, giving it greater resistance to rust and corrosion than ordinary unprotected steel. Unlike steel, stainless steel is suitable for environments consistently in contact with water, like in kitchens and bathrooms. But be aware that stainless steel is not completely corrosion-proof. Its performance depends on the environment and how well the surface is maintained.
- Durability
- Modern appearance
- Low maintenance
When can it be used?
Conclusion:
In conclusion, steel and stainless-steel are generally stronger than common aluminium alloys. Aluminium and steel, however, offer a particularly useful strength-to-weight ratio, whilst stainless-steel is better for water-based locations and outdoor and indoor projects. Galvanised steel is the material to go for to ensure your hardware is completely corrosion resistant.
At Rothley, we have a great selection of aluminium, steel, and stainless steel hardware waiting for you in our handrails, rails, hook sets, and more. Want to find out more about our materials and finishes? Our customer service team would be happy to help!