rons
Diamond
- Joined
- Mar 5, 2009
- Location
- California, USA
Different copper tubes:
Type K - OD = 0.875 ID = 0.745
Type L - OD = 0.875 ID = 0.785
Type M - OD = 0.875 ID = 0.811
I have bent Type K annealed tube with a bending jig. The 7/8 tube was rolled for a 5" radius.
My question is how to change Type M drawn tempered tube to the annealed state. Object is to bend it.
The wall is 0.033 less in thickness compared to type K. It should take less force to bend the tube if it was soft? How to get it soft?
I just have a couple of Mapp gas torches.
How to heat the tube so that it can change state?
Rotate the tube while I run the torch down across the length?
Insert a metal rod into the tube and heat tube, would this distribute the heat more evenly?
Heating to a dull red glow and let cool?
I don't have access to a oven.
Type K - OD = 0.875 ID = 0.745
Type L - OD = 0.875 ID = 0.785
Type M - OD = 0.875 ID = 0.811
I have bent Type K annealed tube with a bending jig. The 7/8 tube was rolled for a 5" radius.
My question is how to change Type M drawn tempered tube to the annealed state. Object is to bend it.
The wall is 0.033 less in thickness compared to type K. It should take less force to bend the tube if it was soft? How to get it soft?
I just have a couple of Mapp gas torches.
How to heat the tube so that it can change state?
Rotate the tube while I run the torch down across the length?
Insert a metal rod into the tube and heat tube, would this distribute the heat more evenly?
Heating to a dull red glow and let cool?
I don't have access to a oven.