What is the maximum magnesium content in AA-5454 plate alloy?

What is the maximum magnesium content in AA-5454 plate alloy?

• A. 1%
• B. 3%
• C. 5%
• D. 0.5%

Answer: (B)

In this alloy family, magnesium is the key element that strengthens the aluminum. AA-5454 is a plate in the 5xxx series, where the strength comes mainly from Mg content. The composition is specified with a maximum of about 3% magnesium. This limit keeps a good balance of strength, ductility, weldability, and corrosion resistance—especially important for marine environments where this alloy is often used. If the magnesium content were allowed to exceed roughly 3%, ductility can decrease and weld cracking and fabrication difficulties become more likely. So the maximum magnesium content for AA-5454 plate is 3% by weight.

In this alloy family, magnesium is the key element that strengthens the aluminum. AA-5454 is a plate in the 5xxx series, where the strength comes mainly from Mg content. The composition is specified with a maximum of about 3% magnesium. This limit keeps a good balance of strength, ductility, weldability, and corrosion resistance—especially important for marine environments where this alloy is often used. If the magnesium content were allowed to exceed roughly 3%, ductility can decrease and weld cracking and fabrication difficulties become more likely. So the maximum magnesium content for AA-5454 plate is 3% by weight.