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General control line discussion => Open Forum => Topic started by: proparc on November 12, 2010, 07:43:50 PM
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For all you metallurgists; for our applications such as engines, does 356 HAVE to heat treated and, is 713 actually a better material for engine cases than 356?
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In 36 years of Aerospace and commercial machining, I'm pretty certain that all the castings I ever machined or inspected were 356, if that means anything. :-\ Steve
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From comments I've seen, as-cast aluminum is soft and "gummy". Even if strength weren't an issue operationally, soft gummy aluminum is a pain in the wazoo to machine -- any manufacturer is going to want to heat treat it just to make it machine nicely.
Dunno about the alloy -- what makes you think 713 would be better?
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From comments I've seen, as-cast aluminum is soft and "gummy". Even if strength weren't an issue operationally, soft gummy aluminum is a pain in the wazoo to machine -- any manufacturer is going to want to heat treat it just to make it machine nicely.
Dunno about the alloy -- what makes you think 713 would be better?
Didn't mean better, just 713 doesn't seem to require post cast heat treat. Somewhat more brittle than 356.