Aluminum alloy wire rod, aluminum alloy stranded wire, covered wire and wire harness, and method of manufacturing aluminum alloy wire rod

A wire harness comprising:

• a covered wire including a covering layer at an outer periphery of one of an aluminum alloy wire rod and an aluminum alloy stranded wire;
• and
• a terminal fitted at an end portion of the covered wire, the covering layer being removed from the end portion,
• wherein the aluminum alloy wire rod had a composition comprising Mg:
• 0.10 mass % to 1.00 mass %, Si:
• 0.10 mass % to 1.00 mass %, Fe:
• 0.01 mass % to 1.40 mass %, Ti:
• 0 mass % to 0.100 mass %, B:
• 0 mass % to 0.030 mass %, Cu:
• 0 mass % to 1.00 mass %, Ag:
• 0 mass % to 0.50 mass %, Au:
• 0 mass % to 0.50 mass %, Mn:
• 0 mass % to 1.00 mass %, Cr:
• 0 mass % to 1.00 mass %, Zr:
• 0 mass % to 0.50 mass %, Hf:
• 0 mass % to 0.50 mass %, V:
• 0 mass % to 0.50 mass %, Sc:
• 0 mass % to 0.50 mass %, Sn:
• 0 mass % to 0.50 mass %, Co:
• 0 mass % to 0.50 mass %, Ni:
• 0 mass % to 0.50 mass %, and the balance:
• Al and inevitable impurities,
• wherein a ratio of (standard deviation of crystal grain size of the aluminum alloy wire rod)/(average crystal grain size of the aluminum alloy wire rod) is less than or equal to 0.57, and a ratio of (diameter of the aluminum alloy wire rod)/(average crystal grain size of the aluminum alloy wire rod) is greater than or equal to 10.