Al-alloy 6061 (AMS4080) Elongation
Al-alloy 6061 (AMS4080) Elongation
(OP)
Hi All
Is it possible to achive the elongation to be more than 30%? For example 50%
My concernig refer to tube od 3inch that should be bend on center line radius 3inch and angle 90 degree (wt=.035"). What heat treatment solution should apply ?
Because the tube 6061-0(annealed) have max elongation 30% and it is not enough to perform full bending.
Is it possible to achive the elongation to be more than 30%? For example 50%
My concernig refer to tube od 3inch that should be bend on center line radius 3inch and angle 90 degree (wt=.035"). What heat treatment solution should apply ?
Because the tube 6061-0(annealed) have max elongation 30% and it is not enough to perform full bending.





RE: Al-alloy 6061 (AMS4080) Elongation
That is an extreme bend. Typically when people need that tight of a fit they miter and weld.
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P.E. Metallurgy, Plymouth Tube
RE: Al-alloy 6061 (AMS4080) Elongation
B.E.
You are judged not by what you know, but by what you can do.
RE: Al-alloy 6061 (AMS4080) Elongation
1. Per SAE AS33611 TUBE BEND RADII, min centerline bend radius [CLBR] for 3.0"-OD aluminum alloy tubing [no specified WT]...
CLBR min... [5>... = 1.5D [CLBR4.5"] or 2.0D [CLBR6.0"]
[5> USE OF SMALL BENDS (LESS THAN 3D) IN HYDRAULIC, PNEUMATIC AND AIRCRAFT FUEL SYSTEMS REQUIRE
THE APPROVAL OF THE PROCURING SERVICE. FOR OTHER FLUID SYSTEMS (LESS THAN 1500 psi) THE SPECIAL
BEND RADII COLUMN MAY BE USED.
BR recommended... = 3D [CLBR9.0"] or 4D [CLBR12.0"]
2. Per SAE AS130 TUBE BENDING RADIUS, CLBR min for 3.0-OD X 0.049-WT [as I read the nomograph] ~= CLBR4.9" ~= 27% strain elongation
NOTE... I think the nomograph can be used to extrapolate strain for 3.0-OD X 0.049-WT X CLBR3.0... but unsure exactly how.
3. Other data I have confirms Min [production] CLBR for 3.0-OD X 0.049-WT shall be NO LESS than CLBR6.0" for low pressure systems.
Regards, Wil Taylor
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