Most of my small projects have used inch square tube, comes in approx 7 metre lengths and I cut and weld to match the job.
When looking at a basic go-kart frame for my kids I thought I would try round both inch and 3/4" or even nearest metric sizes.
The idea was to reduce the cut and weld by bending or forming etc.
When I contacted a stockest I was asked what do I want steam tube, ERW or seamless hot rolled or cold rolled and I must admit to not knowing which one would be suitable at reasonable cost.
I have some steel pipe fixing that I would really say are cast and some nipples! (no jokes here please) that are very heavy walled steel, but going off these I would consider it very hard to be able to form or bend this stuff.
I have used the odd piece of electrical conduit at work but never had to bend it and have always assumed it had no great stength, I connot even remember if it was welded seam or not!
ERW being Electric Resistance welded would this lease a line down the pipe that would be tempered different to the rest, and does it really matter?
So can anyone please give advise on what I should be asking for it will be much appreciated.
Cheers
Adrian