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.


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    Title :

    METAL PIPE, AND VEHICULAR STRUCTURE MEMBER USING METAL PIPE


    Additional title:

    METALLROHR UND FAHRZEUGSTRUKTURELEMENT MIT DEM METALLROHR
    TUYAU MÉTALLIQUE ET ÉLÉMENT DE STRUCTURE DE VÉHICULE UTILISANT UN TUYAU MÉTALLIQUE


    Contributors:

    Publication date :

    2020-05-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    C21D Veränderung der physikalischen Struktur von Eisenmetallen , MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS / B62D MOTOR VEHICLES , Motorfahrzeuge



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