摘要 |
PURPOSE:To obtain an Al alloy having such high strength that the thickness can be reduced, improved deep drawability and improved surface properties after deep drawing by specifying the amounts of Si, Fe and Cr contained. CONSTITUTION:This Al alloy consists of 0.41-0.80wt% Si, >1.25-1.75wt% Fe, 0.05-0.40wt% Cr and the balance Al with impurities. In the composition, Si inhibits earing by deep drawing and increases the elongation, Fe increases the strength and makes the grains fine, and a little Cr increases the strength and elongation and improves the deep drawability. The Al alloy has both strength and ductility and superior formability in a semihardened state as well as in a softened state.
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