Is there any possible reason to use 4140 pre-hard to make the machined parts (that the spechrcals mount into) on a set of racecar A-arms. The parts will be normalized, but not heat treated, I can't see how theyr'ed be ANY reason to use pre-hard, with the welding and normalizing.
The prints for some of the parts have pre-hard as the material, but I don't understand why.
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