Extruded aluminum wire

An extruded aluminum wire comprising:

• Fe, Cu, Ti, Mn, Mg, Cr, B, Ga, V and Zn, wherein a total content of 0.01% by mass or less, and
• one or more components selected from the group consisting of Ni, Y and Si, with the balance being Al and inevitable impurities,
• wherein, in a cross-section perpendicular to the longitudinal direction of the extruded wire, an average grain size measured by electron backscatter diffraction is 15 to 50 μm, respectively, in both a central measurement region including a center point of the cross-section and a peripheral measurement region in contact with the outer periphery of the cross-section,
• wherein the central measurement region is a rectangular region positioned so that an intersection of diagonals of the central measurement region overlaps with the center point of the cross-section, for the extruded aluminum wire having a diameter of 1.6 mm or less, the central measurement region is a rectangular region of 0.23 mm×0.31 mm, for the extruded aluminum wire having the diameter of more than 1.6 mm, the central measurement region is a rectangular region of 0.46 mm×0.61 mm;
• and
• wherein the peripheral measurement region is a rectangular region positioned so that each end of one of two opposing long sides of the peripheral measurement region are in contact with the outer periphery of the cross-section, for the extruded aluminum wire having the diameter of 1.6 mm or less, the peripheral measurement region is a rectangular region of 0.23 mm×0.31 mm;
• for the extruded aluminum wire having the diameter of more than 1.6 mm, the peripheral measurement region is a rectangular region of 0.46 mm×0.61 mm.