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Weldability
EN AW 5754 offers very good weldability, particularly in the H111 temper. The high magnesium content contributes to improved resistance to cracking during and after welding. TIG and MIG welding are the most common methods; MIG is especially suitable for thin sheets. Spot welding can also be an option, while resistance welding is generally less suitable. Typically no post-weld heat treatment is required, and weld seams show good ductility and strength.
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Machinability
The machinability of EN AW 5754 is moderate. It performs somewhat better in the strain-hardened condition than in the annealed state. Compared with higher-strength aluminum alloys it is easier to machine, but it tends to form long, sticky chips that complicate processing. Using carbide or HSS tooling, adequate cooling, and consistent chip evacuation is important to avoid built-up edge and entanglement.
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Forgeability
EN AW 5754 has moderate forgeability. Open-die forging is slightly more suitable than closed-die forging. In the heated state the alloy shows good deformability, allowing for complex shapes. A possible post-forge heat treatment to improve mechanical properties is stress-relief annealing.
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Magnetizability
Aluminum is non-magnetic; the addition of magnesium does not impart magnetism.
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Corrosion resistance
EN AW 5754 exhibits excellent corrosion resistance in atmospheric and marine environments. It also performs well in aggressive conditions with chlorides or chemicals and shows good resistance to stress corrosion cracking and pitting. Anodizing (protective anodizing) can further enhance corrosion resistance.
