Quote:
Originally Posted by Talonmotorsport
I would say go for 2mm ERW as it's a nicer material to work with, just remember to grind a 1mm 'weld prep' (45' angle) around the edges. This will aid in the finish weld as it will give you a guide so you can see the joint,give better penetration in to the material and also means there will be some 'meat' left if you grind the weld nearly flush on the out side to fit the panels.
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I phoned around all the steel suppliers I could up here but no one seems to stock ERW in anything bigger 12mm square so I ordered 7 lengths of Cold Formed SHS EN 10219:S235JRH. Excuse my complete naivety but is this still ok use as chassis material?
I understand that EN 10219 means its cold formed, S235 is strutural steel and yield but I think its the crappy stuff
and the JRH is the fracture toughness of the steel. After reading some posts I'm a bit nervous now using this grade of steel in a car I have to (hopefully :P) drive when its built and is going to play havoc in the back of my mind. I spent £90 but if it's considered crap then I'll have no choice but to find somewhere that can deliver ERW further away. Damn impaitence, really need to stop it as I was hell bent on starting the chassis this weekend.