Why is rebar not supposed to be welded?

Question

Why is rebar not supposed to be welded?

Answer 1

Strength.  You can weld it, but in its normal use, as reinforcements in a poured wall/slab/footer, etc. you connect it with wires so it retains all its strength and meets the specs. the engineers have worked out.  Welding can weaken it at the point where it is heated.  So the answer is you can weld it and it will be fine if you don't care that the weld point will be a bit weaker, but when the plan specifies rebar of a certain thickness etc. you should put it together in the form the normal way, using wires to tie things together.

Answer 2

You cannot weld rebar. It weakens the hardening and then the strength. It always must be tied

Answer 3

because it will lose strength and evenually collapse. Just wire tie with thick  metal wire

Answer 4

Wha? Who said it's not? Rebar can be welded like any other steel.

Answer 5

weld it and dont worry about it

Answer 6

Re bar is a cheap steel and will crystallize the structure if exposed to high heat.

This is what we were taught in metallurgy class, but I have seen it welded many times with no problem. Perhaps I have not seen it under the right stress to show its weakness.

tcw

Answer 7

It depends on what you are using it for, it's a good cheap steel bar, It bends and will break at some point. heating it might take out some of the strength or make it brittle.

Answer 8

Re-bar like any other steel once welded structurally wise is altered,But using mig welders will not weaken it any more than normal steel of similar dimensions-Also depends on what you intend using it for.

Regards

Wolf