[gnabgib]

I needed a short length of channel, 37x40x300mm, and as I had the stainless, decided to TIG it up using some of the pieces I had but the open side has closed up a little so I'll need to wedge it and heat until it's back to correct size. Anything I need to consider re. the heating?

[weldin mike 27]

If you overheat stainless steel it can lead to loss of stainless properties. Best to cold work if possible. As in a hydraulic ram. (porta power)

[gnabgib]

If you overheat stainless steel it can lead to loss of stainless properties. Best to cold work if possible. As in a hydraulic ram. (porta power)

Thanks, I take your point about the heating but I don't have access to any sort of press equipment. Only small so possibly clamps and wedges? I suppose if I use heat it would by oxy propane and probably less than the original TIG work.
Also have a stick hot box so maybe clamped up and an hour or 2 in that?

[weldin mike 27]

Blocks of wood and wedges will do the job. I don't know what temp the grain boundaries start to mess up, but it's definitely what you would expect for bending thick metal. Someone smarter than me will be along in a little while.

[Coldman]

You can heat it to a dull red no problem. It's only when you get close to melting point that grains can get messed with.

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[weldin mike 27]

Thanks Coldman. See. I told you that a smarter person would come along.

Mick

[Coldman]

I'm a fart smeller from way back

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