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Thanks Demon3. To explain a little further I don't see the F peak prior to baking the system. This may be explained by the large water peak at 18 masking the smaller F peak at 19. After I bake I see F along with a lesser peak of HF. I believe F is being liberated from somewhere during the bake...

I am using PTFE coated wires in a vacuum system. It is being baked to 200 C to facilitate getting the proper vacuum level. I have an SRS residual gas analyzer for monitoring the system. After the 20 hour bake I see the RGA head is contaminated with F. Does anybody know the temperature at...

I'm having trouble finding information regarding the magnetic properties of Hastelloy C276. Anybody know where I can look to find it? Thanks for any help.

Thanks for the response dgallup. Is this an internal spec you use or is it something you got from a standard? I have seen similar numbers but slightly lower. Ranging from 705 to 790 C. 430F would be a good choice except for the sulfur content. It's too high to be used in an ultra high...

Thanks for the response, it is appreciated.

Does anybody have any personal experience or source of information on heat treatment of 430 to maximize permeability? I will be making a vacuum chamber from 6" diameter 430. The material will be heavily machined and welded and I plan to anneal it to remove any magnetic hot spots. Any...