| 摘要 |
PROBLEM TO BE SOLVED: To provide a brazing sheet which can obtain both of the high strength after brazing while improving formability and formability of a raw material.SOLUTION: A sacrificial material is composed, by mass%, of 4.1-7.0% Zn, 1.2-2.5% Mg, 0.1-0.4% Si, and the balance Al with inevitable impurities and the ratio of the Zn content to the Mg content, Zn/Mg, is 3 or higher. A core material is composed, by mass%, of 1.0-1.8% Mn, 0.5-1.2% Si, 0.1-0.4% Fe, 0.5-1.5% Cu and the balance Al with inevitable impurities. Further, the average crystal grain diameter after brazing the core material, is in the range of 30-200 μm, and the core material and the sacrificial material under condition of the raw material, are fibrous structure. |
