Cromoly Chassis...

Chassis and suspension of whatever design

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Re: Cromoly Chassis...

Postby Kango on Tue Sep 16, 2008 9:36 am

i had 2 hoops behind my seats and the 50 mm looked too skinny, but as i am trying to build a 500Kg car I will not mind going for the smaller section.

I am planning a roll bar with 2 braces to the back and one to the passanger's foot well. Is that 38mm or 50 mm?
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Re: Cromoly Chassis...

Postby andredp on Tue Sep 16, 2008 8:56 pm

For just a rollbar with braces to the back(to the bottom of the chassis please, not the flimsy top rail) and a front brace, I would stick with 50mm. Only go with 38mm if you do a proper cage.
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Re: Cromoly Chassis...

Postby JonnyB on Wed Jun 28, 2017 1:16 pm

Hey guys,
So I'm new here... and I don't have a 7, please don't attack me :lol:
I found this discussion interesting, and thought I could help with a few questions, and maybe get some advice.
I source my 19mm Cromoly from Placo and everything from 25 x 1.5mm to 50 x 2mm from ATS... I'm sure both suppliers offer other sizes, that's just what we use.

Anyone else know where I can get??

We CO2 weld mainly, but do some TIG on certain sections. On some of the chassis we use a mix of mild steel and Cromoly, and there is not issue welding the two together.

Our chassis take much harder hits, and we need to keep weight down... not a Locost way of doing things, but its great strength for weight. Prices are closer to R300 per meter though.
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