| 摘要 |
PROBLEM TO BE SOLVED: To provide an Al alloy filler metal, in a joined body obtained by melt welding of a prescribed Al material, which reduces welding crack sensitivity thereof, and can obtain a welded joint having excellent strength properties. SOLUTION: The filler metal used in melt welding for an Al material is composed of an Al alloy having an alloy composition comprising, by mass, 5.5 to 8.0% Mg, 0.05 to 0.25% Cr, ≤0.25% Ti, ≤0.4% Si, ≤0.4% Fe, ≤0.1% Cu, ≤0.05% Zr and ≤0.25% Zn, and the balance Al with inevitable impurities. COPYRIGHT: (C)2011,JPO&INPIT |
