Thread: Which kind of Aluminum is a good choice
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Unread 23-10-2015, 10:22
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Re: Which kind of Aluminum is a good choice
Quote:
Originally Posted by jwfoss View Post
Material selection is an engineering trade off but a general rule of thumb we go by is the following:
Sheetmetal/Bending (Up to .125 Thick) - 5052
Plates/Gearboxes (.125+ Thick) - 6061
Shafts (Hex or Round) - 7075
Be very careful of the origin of 7075 if you are using it in a high stress application. We used 7075 for drivetrain axles a few years ago only to replace them with 4041 (steel) after the 7075 fractured at the first competition. One of Rosie's mentors is a metallurgist and has a co worker who is an industry expert in aluminum and traced back this particular batch to China and really crappy grain structure after micro-sectioning and analysis.
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