#1
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1100 Aluminium annealing question
Sorry for the dumb question and English spelling, but does 1100 (pure) aluminium age harden like the higher strength alloys do, after it has been annealed. i have always thought it only work hardened, but would like to hear from someone that knows.
It'll be a sad day when we stop learning.
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David Hamer |
#2
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I think you will be hard pressed to work harden 1100 al.
no it does not age harden these are the beauties and buggers about 1100 it is soft so it works easy but it does not know to stop. |
#3
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Quote:
Ken is correct - 1100 alloy only work hardens. Annealing it is a permanent change, not related at all to aging. If you just look at the letter designating hardness: "T" or "H" - you will know immediately that "H" signifies only work hardening (Hammering), and "T" signifies thermal hardening through precipitation, or aging. Yes, both alloy groups may be work hardened, but the full tensile strength of the "T" group is only obtained thermally. (psst, no such thing as a dumb question - you remain dumb only by not asking...)
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Kent http://www.tinmantech.com "All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919. |
#4
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Thank you Ken and Kent you confirmed what i had thought. I should reread Kent's website articles on aluminum, because I didn't realize the full meaning of the 'T' and the 'H' in the material spec as pointed out here.
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David Hamer |
#5
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Quote:
Thanks for the reminder, David. Here is one article, on aircraft aluminum alloys, and has the "H" and "T" groups covered, as David referenced. https://www.tinmantech.com/education...num-alloys.php and a few other articles on metal working: https://www.tinmantech.com/education/articles/
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Kent http://www.tinmantech.com "All it takes is a little practical experience to blow the he!! out of a perfectly good theory." --- Lloyd Rosenquist, charter member AWS, 1919. |
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