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Aluminium Grade 3103 vs 3003 – What’s the Difference

Aluminium Grade 3103 vs 3003

Aluminium is a versatile and lightweight material used in various applications, including construction, transportation, and packaging. Two popular aluminium grades are 3103 and 3003. While they may seem similar, there are differences between the two that make one better suited for certain projects than the other. In this article, we will compare and contrast aluminium grades 3103 and 3003 to help you determine which one is best for your needs.

Difference Between Aluminium Grade 3103 and 3003


The main difference between aluminium grade 3103 and 3003 is their chemical composition. Grade 3103 has a higher level of manganese (0.5-1.5%) than grade 3003 (0.7%). This makes grade 3103 more corrosion-resistant, making it ideal for use in marine environments or other applications where it will be exposed to the elements. Grade 3003 is softer and easier to form, making it a popular choice for applications that require a lot of bending and shaping.

Strength and Durability

Another important factor to consider when choosing between aluminium grades is their strength and durability. In general, grade 3103 is stronger and more durable than grade 3003. This is due to its higher manganese content, which helps to improve its overall hardness and strength. For applications requiring higher strength and durability, such as heavy machinery or structural components, grade 3103 is the better choice.


Weldability is another important consideration when choosing an aluminium grade. It refers to the ease with which two pieces of material can be joined using welding techniques. In general, both grade 3103 and grade 3003 are considered to be highly weldable. However, grade 3003 is known to be slightly easier to weld compared to grade 3103. If welding is a critical factor in your project, grade 3003 is the better option.


Finally, price is always a consideration when choosing between two materials. Generally, grade 3003 is more expensive than grade 3103 due to its higher strength and durability. However, the price difference may need to be more significant to make a difference in your decision. It ultimately comes down to your specific project needs and budget.


When deciding between aluminium grade 3103 and 3003, there are several factors to consider. The chemical composition, strength and durability, weldability, and price must all be considered to determine the better choice for your project. If you need a material that is highly resistant to corrosion, then grade 3103 may be the better choice. If you require a material that is easy to bend and shape, grade 3003 is the better option. Ultimately, the decision comes down to your specific needs, and it is recommended to consult an expert to help you make the best choice for your project.

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