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Alloy 6156 is an Al-Si-Mg-Cu-Mn weldable alloy, developed for the lower portion of the fuselage, which required a T6 temper strength level and high damage tolerance properties. This datasheet provides information on key alloy metallurgy of this 6xxx series alloy. Fatigue crack growth and material toughness for various thicknesses of alloy 6156 clad T62 are illustrated.

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