Quote:
Originally Posted by AtomicLabMonkey
Well, they're both steel. 1018 or 1020 for example are regular mild carbon steels, and 4130 is a higher carbon content steel with chromium, molybdenum, and some other good stuff mixed into the metal composition. BUT.. 4130's strength is all about how it's been heat treated (quenched/tempered).
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INCREDIBLY good to know for all who are looking at chromo cages, frames, chassis. I can all but guaranty none of the chassis or bars available to the VW community are treated to any heat aside from welding.