ALUMINUM ALLOY HAVING EXCELLENT WELD CRACK RESISTANCE

摘要

PROBLEM TO BE SOLVED: To provide an aluminum alloy having excellent weld crack resistance in an arc welding method. SOLUTION: The aluminum alloy material in which no generation peak at <=550 deg.C can be practically seen in the cooling curve from melt obtained by measuring thermal change in the solidification process of the aluminum alloy material to be welded by means of differential thermal analysis can be provided.