My team and I are encountering our first robot build.......a heavyweight. So were making it easy on ourselves.
We're pretty set on an invertible ram/wedge 4wd defensive bot.

Definitely a NOOB.

Being a welder/fabricator my task is to ensure we have a chassis that wont be ripped to shreds on our first encounter with a spinner.
initial thoughts when first approached were 6-8mm thick mild steel plate. However after re watching the last series of robot wars everyone was using hardox (I'd never heard of it)
I was planning a complete monocoque chassis (inc. wedge) fully welded with chamfers on each side of the wedge to minimise being struck at a hard right angle.
Basically is this possible to achieve in mild steel or is it a must, with spinners around like carbide, that hardox is used.

any ideas would be much appreciated.
Cheers.
Pep.