Just had a phone call from a m8 wanting to fix some holes in his camper, he asked would 2mm steel sheet be ok, I am pretty sure that may be a bit excessive .
Could some nice person tell me what thickness steel he needs.
Tia
Quoting from somebody more knowledgable than me on another forum:
body tinware 1.0 - 1.2 mm not much difference to the result, but the 1.2 mm is better to weld and work with and gives good support when butt welding /letting in;
1.5 mm for steps, lip and edge repairs, inner arch repairs (around seat belt anchorages), inside of B posts down to jacking point;
2.0 mm reinforcement for seatbelt anchorages, out rigger repairs, to vertical support above rear arm mount (need lower rear wing/arch off to get to this ,so you should know what your doing lol);
2.5 - 3.0 mm replacing top of deformation panel (which lower front panel mounts to ) and main chassis repairs.
Depends on the car I guess but on outer panels etc I use 0.8mm, more structural or reinforcing areas it's 1.2mm. Even the spring perches on my Merc are only made of 1.2mm steel. I do have some 2 and 3mm plate but it's so rare that I have to weld anything that thick on a monocoque car.
well that was unpleasant, more filler and rust than metal, struggling to get a decent earth to windy for tig and should of switched to 0.6mm wire in mig.
but its done and plenty strong.
had to do a series of bridge tacks up to 10mm wide, but the cubitron2 fibre pads from @hotponyshoes made short work of blending them back in, seriously impressive
no pics im afraiid as 1. it was fugly, 2. my m8 attacked it with primer as soon as they was blended back in
but after a quick coat of glass filler you cant see where patches were.
and he was so pleased he made it well worth my time, even though i didn't want anything