1018 Steel vs 6061 Aluminium – What’s the Difference

1018 Steel vs 6061 Aluminium

If you work in construction or manufacturing, you’re no stranger to the debate between 1018 steel and 6061 aluminium. These two materials are commonly used in various industries but differ in a few ways. Understanding their differences can help you choose which would work better for your project. In this blog post, we’ll delve into the differences between 1018 steel and 6061 aluminium and hopefully answer some of your questions about them.

Difference Between 1018 Steel and 6061 Aluminium

Material Composition:

The first notable difference between 1018 steel and 6061 aluminium is their composition. 1018 steel is a low-carbon steel with 0.18% carbon content and trace amounts of other elements such as manganese, phosphorus, and sulfur. On the other hand, 6061 aluminium is made up of aluminium, magnesium, and silicon, making it an alloy. This composition affects each material’s properties and behaviour under different conditions.


The second point of difference is the weight; 6061 aluminium is lighter than 1018 steel. This makes it a popular choice in the aerospace and automotive industries, where weight plays a significant role in performance. Its lightweight also contributes to easy transport, making it cost-effective for businesses that rely on shipping.

Strength and Durability:

1018 Steel is known for its high strength and durability, ideal for heavily loaded applications like construction and manufacturing. Albeit less strong than 1018, 6061 aluminium is also known for its strength and malleability, making it an excellent choice for products that undergo repetitive stress.

Corrosion Resistance:

When it comes to corrosion resistance, 6061 aluminium trumps 1018 steel. Aluminium is naturally corrosion-resistant, unlike steel, which requires coatings to keep it from rusting. As a result, 6061 aluminium is often used for outdoor applications with frequent exposure to moisture.


Finally, the cost of 1018 steel and 6061 aluminium differs. 6061 aluminium is more expensive than 1018 steel, primarily due to the added cost of processing its mixture of metals. However, this cost difference could be offset by the overall benefits of your chosen material.


In conclusion, 1018 steel and 6061 aluminium have unique qualities and benefits, and choosing one over the other would depend on specific project requirements. Understanding the differences between both materials can help you make an informed decision that aligns with your project requirements. This information makes it easy to choose based on your budget, weight, durability, strength, and corrosion resistance needs. So, evaluate your project’s needs, consult with the experts, and make a decision that works best for you.

Minal Jogale

Minal Jogale

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