| 摘要 |
An aluminum alloy product includes additive elements of 3.0 to 4.2 wt % of silicon, 0.4 to 0.6 wt % of magnesium, 0.2 wt % or less of iron, and 0.5 wt % or less in total of zinc, manganese, nickel, tin and chromium. The additive element substantially excludes copper. The aluminum alloy product is formed by forging a casting of which shape is approximated to a shape of a final product.
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