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A Guide to Aluminium Alloy Designations 

Aluminium Alloy Designations

Understanding the complex range of aluminum alloys is essential for anyone who works with them. Various alloys are available, each with its own set of properties and characteristics. To make it easier to differentiate between them, alloys are designated with a four- or five-digit number that identifies the percentage of alloying elements in the metal. This blog post will provide an overview of aluminum alloy designations and how they’re used.



What is Aluminium Alloy Designations?

Aluminum alloy designations are composed of numbers separated by dashes. These numbers indicate the composition of the alloy, as well as its formability and physical properties. The first two digits identify the specific type of alloy (such as 6000-series aluminum), while the last two identify its formability (such as T6 temper).

For example, 6061-T6 aluminum is a 6000-series aluminum with high strength and good formability, while 5052-H32 is a 5000-series aluminum with increased corrosion resistance and excellent weldability. It’s important to note that these designations can vary from one manufacturer to another; however, they should generally be consistent across most suppliers if you need to order specific materials for your project.

Common Alloys Used in Manufacturing

There are dozens of different types of aluminum alloys used in manufacturing today. Some popular ones include 1100 (which is 99% pure), 2017 (stronger than 1100 but more difficult to machine), 2024 (high strength but not ideal for welding applications), 3003 (excellent corrosion resistance), and 5086 (highly resistant to seawater corrosion). Additionally, 7000 series alloys such as 7075 are among the strongest available; however, they are also more expensive than other types due to their greater strength.




Understanding aluminum alloy designations is essential when selecting materials for your project. By familiarizing yourself with these designations — such as 1100, 2017, or 3003 –, you’ll be able to quickly identify which type of alloy you need based on its associated properties and characteristics. Additionally, a common understanding of alloys used in manufacturing will help you make an informed decision when selecting materials for your projects or designs. As always, consult an experienced engineer or supplier before making any final decisions about the materials you use!

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