Annealing Copper Sheet Gas Torch

You should have a form to bend it against.

Annealing copper sheet gas torch.

Hold the flame 3 4 in 7 6 10 2 cm from the copper you re annealing. When you anneal copper it expands and becomes soft and pliable thus giving you a seal once the copper has been compressed. Connect the torch head to the oxygen and acetylene tanks using the torch hoses. Anneal bend a little anneal again bend a little and repeat.

Step 1 completely shut off the valves on the oxygen and acetylene tanks. Many torches generate sufficient btu and flame temp to anneal a large copper sheet but the copper conducts the energy so readily that it acts like a giant heatsink radiateing energy acrosss its entire surface faster than you can get it in. So long as you get the copper red hot then let it cool it will bend. Hold the flame farther than 4 5 inches 10 13 cm away and the copper will take a long time to heat.

Annealing is a method of softening metal that has been hardened by one method or another. The torch head is a pencil tip and i am using mapp gas. Propane will work fine to anneal the copper pipe you will have to anneal several times while you try to bend it. Copper is one of the metals that hardens when it is worked bent stretched.

I have a feeling the piece is just too large to get it to cherry red within a reasonable amount of time. Having some trouble annealing copper sheet using mapp gas torch. Annealing copper requires you to heat the copper so that it softens as soft copper can be worked without becoming brittle. I usually use a bernzomatic mapp gas torch and heat the entire copper gasket until its cherry red then quickly dump it in a bucket of cold water to quench it.

If all you want to do is color the copper a small torch will likely do the job but you are not likely to be able to actualy anneal any signifiacnt size piece. Point the flame directly at the copper band or pipe.