Abstract: A control arm includes a pair of mounting portions provided separately from each other and a main body portion extending in a X-direction and connecting the pair of mounting portions. At a cross-section perpendicular to the X-direction at a position along the X-direction, the main body portion includes: a first V-shaped member having a first apex and opening from the first apex in a V-shape toward one side in a Y-direction, and a second V-shaped member having a second apex and opening from the second apex in a V-shape toward the other side in the Y-direction. At the cross-section, the first apex and the second apex are joined. At a cross-section perpendicular to the X-direction at the center position of the main body portion in the X-direction, an opening angle of the first V-shaped member and an opening angle of the second V-shaped member are each no more than 150°.

Abstract: A control arm includes a pair of mounting portions provided separately from each other and a main body portion extending in a X-direction and connecting the pair of mounting portions. At a cross-section perpendicular to the X-direction at a position along the X-direction, the main body portion includes: a first V-shaped member having a first apex and opening from the first apex in a V-shape toward one side in a Y-direction, and a second V-shaped member having a second apex and opening from the second apex in a V-shape toward the other side in the Y-direction. At the cross-section, the first apex and the second apex are joined. At a cross-section perpendicular to the X-direction at the center position of the main body portion in the X-direction, an opening angle of the first V-shaped member and an opening angle of the second V-shaped member are each no more than 150°.

Abstract: A tailored blank material 10 is configured by welding a plurality of steel plates 12, 14, and 16. At least one steel plate 12 among the plurality of steel plates 12, 14 and 16 is welded to other steel plates 14 and 16 so that the rolling direction 12a thereof differs from the rolling directions 14a and 16a of the other steel plates 14 and 16. Thickness of at least one steel plate among the plurality of steel plates 12, 14, and 16 may differ from thickness of other steel plates.