Steel sheet to be jointed with aluminum-based material by brazing, jointing method using the steel sheet, and coupling joint

TL;DR: In this article, the problem of providing a steel sheet that can form a coupling joint superior not only in shear tensile strength but also in peeling strength when jointed with an aluminum-based material by brazing is addressed.

Abstract: PROBLEM TO BE SOLVED: To provide such a steel sheet as to form a coupling joint superior not only in shear tensile strength but also in peeling strength when jointed with an aluminum-based material by brazing. SOLUTION: The steel sheet is any one of steel sheets selected from the group consisting of a galvannealed steel sheet, a hot-rolled steel sheet and a cold-rolled steel sheet; and comprises, by mass%, 0.05-0.25% C, 1.5% Si or less, 0.1-3.5% Mn, 0.05% P or less, 0.03% S or less, 0.1% Al or less while satisfying C+Mn/40≥0.12, and the balance Fe with unavoidable impurities. COPYRIGHT: (C)2007,JPO&INPIT