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Abstract

An aluminum alloy forging of the present invention includes 0.15 wt % to 1.0 wt % of Cu, 0.6 wt % to 1.3 wt % of Mg, 0.60 w t% to 1.45 wt % of Si, 0.03 wt % to 1.0 wt % of Mn, 0.2 wt % to 0.4 wt % of Fe, 0.03 wt % to 0.4 wt % of Cr, 0.012 wt % to 0.035 wt % of Ti, 0.0001 wt % to 0.03 wt % of B, 0.25 wt % or less of Zn, 0.05 wt % or less of Zr, the balance being Al and inevitable impurities. When integrated intensity of a diffraction peak of an AlFeMnSi phase in an X-ray diffraction pattern obtained by an X-ray diffraction measurement of a cross-section of the forging is “Q₁” (cpd·deg) and integrated intensity of a diffraction peak of a (200) plane of an Al phase is “Q₂” (cps·deg), a value of Q₁/Q₂ is 6×10⁻² or less.

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