Hollow member

摘要

A lightweight hollow member having excellent rigidity and collision characteristics, the hollow member being suitable for an automotive part because of having high tensile strength equal to or higher than, for example, 780 MPa and a complex shape. A hollow member (11) provided with a steel hollow body (14).  The body (14) consists of a single part at least in the longitudinal direction.  The body (14) has a flat cross-section at least having portions where the body (14) has the largest outer dimension (L