In Reply to: Re: 6061-T6 aluminum question posted by Dave P. on 07/08/00 at 12:16 AM:
I addressed this question to a local tubing bending house. He asked me if I could tolerate a small flatting in the forming process. I answer was yes, as long as the min ID did not fall below 0.150" (start ID= 0.180") All he did was to wind it on to a 1.00" OD tube! (one inch OD tube in pipe threading machine chuck) When he was finished, I had a tight coil with a 1.080" ID. (0.080" spring back) The tubing was compressed only 0.018". (0.036" max to min OD difference)
We have done two more six foot lengths. I was able to saw fifty "donuts" from these three formed pieces. Bringing the ends together was no problem, with the ends being no more than 0.030" apart. I plan to Tig, tack weld the ends.
They weigh 4.4 grams each!
Thanks for current input on subject,