I am working on a welding project, and would like to know how to introduce a sharp bend in a piece of relatively thin (1-2mm) sheet steel. Would heating be required? I would like the smallest bending radius possible, but don't have access to fancy equipment.

https://www.google.com/search?q=sheet+metal+brake&espv=210&es_sm=93&source=lnms&tbm=isch&sa=X&ei=_N0rU9jeCcHZoATQtIBI&ved=0CAkQ_AUoAg&biw=1517&bih=714&dpr=0.9#imgdii=_

 

Most community colleges have these machines they would probably help you out. If you can get to Portland, Oregon I will bend it on mine for free.

Heating and air conditioning shops have them also, find the closest one and tell them what you need and they will probably be fairly cheap if its not to complex or time consuming.

Ordinary (ferritic carbon steel) accepts sharp bends without heating. Depending on the width, you can do it with a hammer in vice.

What are you seeking to bend?

The answer to the question might be a lump of wood or some expensive bit of technical kit.