Abstract: There are provided aluminum alloy for a vehicle and a part for a vehicle in which toughness suitable for the part for a vehicle can be secured even when aluminum material containing impurities such as Fe, Cu or the like is used. The aluminum alloy for a vehicle contains Fe in the range from not less than 0.2 wt % to not more than 1.0 wt %, Mn in the range from not less than 0.01 wt % to not more than 0.7 wt %, Si and Cu, and Al and unavoidable impurities as residuals, and the size of intermetallic compounds is equal to 30 ?m or less.

Abstract: A frame member for use in a two-wheeled vehicle and an all-terrain vehicle that includes a plurality of Al members each made of a 7000 series Al alloy having a high strength is provided in which weld crack sensitivity is reduced and a weld joint having an excellent strength is provided. The alloy composition of the 7000 series Al alloy, which provides the Al member, containing Cu: 0.01 to 0.50%, Mg: 0.5 to 2.1%, and Zn: 4.0 to 8.5%, with the balance being Al and inevitable impurities. Further, in the production of the frame member, the plurality of Al members are integrated by welding using a filler metal containing Mg: 5.5 to 8.0%, Cr: 0.05 to 0.25%, Ti: 0.25% or less, Si: 0.4% or less, Fe: 0.4% or less, Cu: 0.1% or less, Zr: 0.05% or less and Zn: 0.25% or less, and with the balance being Al and inevitable impurities.

Abstract: A frame member for use in a two-wheeled vehicle and an all-terrain vehicle that includes a plurality of Al members each made of a 7000 series Al alloy having a high strength is provided in which weld crack sensitivity is reduced and a weld joint having an excellent strength is provided. The alloy composition of the 7000 series Al alloy, which provides the Al member, contains Cu: 0.01 to 0.50%, Mg: 0.5 to 2.1%, and Zn: 4.0 to 8.5%, the balance consisting of Al and inevitable impurities. Further, in the production of the frame member, the plurality of Al members is integrated by welding using a filler metal containing Mg: 5.5 to 8.0%, Cr: 0.05 to 0.25%, Ti: 0.25% or less, Si: 0.4% or less, Fe: 0.4% or less, Cu: 0.1% or less, Zr: 0.05% or less and Zn: 0.25% or less, and the balance consisting of Al and inevitable impurities.