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Old 04-11-08, 08:34 PM
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BCRider
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If it helps you may want to know that the fancier grades of alloy will be stamped with the alloy familiy and the heat treat number. The times I've bought 6061-T whatever there's bands of repeating info stating company name and alloy in one inch lettering and each band is spaced about 10 inches apart. If you buy a 2 foot square piece or larger it's impossible to not know the alloy provided it's something worthy and pricey enough to be marked. Only the softer and unsuitable grades for applications like this are not marked with the alloy and treatment info. All the "aircraft" grade sheets will be marked.
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