When comparing 3003 alloy and 3004 alloy for your application, it's important to consider their specific properties and how they align with your requirements. Here's a comparison of these two aluminum alloys:

3003 Alloy:

• Composition: It is an aluminum-manganese alloy, with manganese being the primary alloying element.
• Strength and Formability: 3003 alloy offers good strength and excellent formability, making it easy to work with during manufacturing processes such as bending, rolling, and forming.
• Corrosion Resistance: It has good resistance to atmospheric corrosion, making it suitable for outdoor applications.
• Weldability: 3003 alloy exhibits excellent weldability, enabling easy joining with other components or structures.
• Typical Uses: It is commonly used in various applications such as cooking utensils, heat exchangers, roofing, and general sheet metal work.

3004 Alloy:

• Composition: It is an aluminum-manganese alloy, similar to 3003, but with a higher manganese content and the addition of a small amount of magnesium.
• Strength and Formability: 3004 alloy offers higher strength compared to 3003, making it suitable for applications that require greater structural integrity.
• Corrosion Resistance: It has good resistance to atmospheric corrosion, similar to 3003 alloy.
• Paintability: 3004 alloy exhibits excellent paint adhesion and is often used in applications where painting or coating is desired.
• Typical Uses: It is commonly used in the manufacturing of beverage cans, automotive parts, storage tanks, and other applications where strength and paintability are important.

Choosing between 3003 alloy and 3004 alloy depends on the specific requirements of your application. If formability and weldability are primary concerns, along with good corrosion resistance, 3003 alloy may be suitable. On the other hand, if you require higher strength and paintability, along with similar corrosion resistance, 3004 alloy could be a better choice.

It's recommended to consult with a materials engineer or supplier who can further evaluate your specific application needs and provide tailored advice based on your requirements.