Aluminum 6061 series aluminum alloy, this is a combination of aluminum with magnesium (about 2% by weight) and silicon (around 0.5% by weight), sometimes mixed with a variety of other materials such as iron, copper, chromium, zinc, manganese and titanium. 6061 alloy is a strong, sturdy, easy to weld connection, often are used as frames (ribs) (as well as airplanes, boats and many more types).Aluminium 7005 series aluminum alloy, this is a combination of aluminum with zinc (approximately 4.5% by weight), sometimes mixed with a variety of other materials such as Silicon, magnesium, iron, copper, chromium, manganese and titanium. 7005 aluminium alloy 6061 aluminum about 10% more rigid but a bit more brittle, 7005 aluminum alloy 6061 unlike, it requires no over heat treatment with more expensive in terms of money to be hard enough, but in return to use thickness to promoting 7005 reinforcement stiffness, this explains the use of aluminum alloy 7005 not through heat treatment, the low price but the weight the amount of the increase (heavy)
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