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7039 aluminium alloy : ウィキペディア英語版 | 7039 aluminium alloy AA 7039 is an aluminum alloy principally containing zinc (3.5–4.5%) as an alloying element. It also contains 0.30% silicon, 0.40% iron, 0.10% copper, 0.10–0.40% manganese, 2.3–3.3% magnesium, 0.15–0.25% chromium, 0.10% titanium and up to 0.15% trace elements. The density of 7039 aluminium is . This alloy was first registered in 1962, in the United States. ==References==
==Further reading== * "Properties of Wrought Aluminum and Aluminum Alloys: 7039", ''Properties and Selection: Nonferrous Alloys and Special-Purpose Materials'', Vol 2, ASM Handbook, ASM International, 1990, p. 109-111.
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