As mentioned in the subject, I'm looking for steel suitable to be used to m ake an Olympic barbell, 2.2m long and 28mm in diameter. I'm torn between ch rome-moly steel and spring steel. Again I'm not a metallurgist and know ver y little about these things. The bar will be at least 190000 psi tensile st rength with 170000 psi yield strength. I'm also looking for decent machinin g characteristics so that I can put a knurl on it and cut grooves to attach sleeves.
Here are some steels I've thought about
SAE 4340 (Heat treated to the required Tensile strength) SAE 4140 EN 47??