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003 aluminum is alloyed with 1.2% manganese. While more malleable and formable than 5052 aluminum, it is not as strong (tensile strength 17 to 30 KSI vs. 31 to 41 KSI). 

Due to the presence of copper, 3003 aluminum is highly resistant to corrosion. This grade also features excellent workability and weldability. Common applications for 3003 aluminum include sheet metal work, commercial signage, and refrigerator liners. 

3003 aluminum sheet and 5052 aluminum sheet are typically known as “Common Alloys” because they are two of the most widely specified alloys in the aluminum industry. But the differences between them show that even minor tweaks in the composition can have a big impact when it comes to desired properties and end-uses. Here is a list of the differences between the 3003 and 5052 aluminum alloys.