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Help choosing steel...

Help choosing steel...

Help choosing steel...

(OP)
Hi.  I am searching for a low-carbon steel that will allow me to do the following.  First, the dimensions of the steel bar I will be using are 1/4" by 1/4" by 48".  I will be welding this bar to other pieces of steel, painting it, and then baking it in an oven at 500 degrees F for 15 minutes.  I need to bake it two times to allow paint to cure.  The problem I have experienced is that the steel tends deform.  There are shear strains, which are causing bending and twisting of the steel bar.  Could someone please recommend a steel that would stay straight through my process?  Thank you very much.

RE: Help choosing steel...

I suspect that it is the thermal deformation of your welded structure that is causing the twisting of your 'sliver' of steel.  I am not sure any steel could do what you are asking.  To confirm it is the structure and not the 48 inch 'sliver' bake it at 500 F by itself.  If it still does try a larger diameter, a longer bake time at lower temperature, or pre-annealing.

RE: Help choosing steel...

You might try a slower heating rate, or stress relieving it prior to painting (long time, low temp).  Or just clamp it onto a heavy metal section during heating.  Just remember to heat and cool slowly.

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