A metal pipe 1 has a quadrangular cross section. The metal pipe 1 includes a pair of side walls 11 and 12 facing each other and having a height H, a top portion 13 connected to an upper edge of each of the pair of side walls 11 and 12, and a bottom portion 14 connected to a lower edge of each of the pair of side walls 11 and 12. The metal pipe 1 has a length six times the height H of the side walls 11 and 12 or more. Each of the pair of side walls 11 and 12 includes a high-strength portion 11A or 12A and a pair of low-strength portions 11B or 12B. Each high-strength portion 11A or 12A has a dimension not less than (2/3) H and not more than 3H as measured in the longitudinal direction of the metal pipe, the high-strength portions forming opposite portions of the pair of side walls 11 and 12, each high-strength portion having a yield strength not less than 500 MPa. The low-strength portions 11B or 12B sandwich the high-strength portion 11A or 12A as determined along the longitudinal direction of the metal pipe, each low-strength portion having a yield strength of 60 to 85 % of that of the high-strength portion 11A or 12A.
METAL PIPE, AND VEHICULAR STRUCTURE MEMBER USING METAL PIPE
METALLROHR UND FAHRZEUGSTRUKTURELEMENT MIT DEM METALLROHR
TUYAU MÉTALLIQUE ET ÉLÉMENT DE STRUCTURE DE VÉHICULE UTILISANT UN TUYAU MÉTALLIQUE
2020-05-13
Patent
Electronic Resource
English
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