4140mod Forged bar -Normalizing - is it still done?
4140mod Forged bar -Normalizing - is it still done?
(OP)
We have a company mats spec that requires forged bar that we buy in to have been normalised before Q+T.
In my structural steel experience, normalising has been pretty much superceded these days. Eg in Rolled structural steels, controlled rolling is used where lower temps in the last stages of hot rolling are employed to control austenite grain size so that it transforms to a fine grained ferrite.
So do they do they same thing in forged bar?
We have been offered some 6inch 80ksi 4140mod but the supplier has noted that it does not meet our mat spec to be normalized prior to Q+T.
In my structural steel experience, normalising has been pretty much superceded these days. Eg in Rolled structural steels, controlled rolling is used where lower temps in the last stages of hot rolling are employed to control austenite grain size so that it transforms to a fine grained ferrite.
So do they do they same thing in forged bar?
We have been offered some 6inch 80ksi 4140mod but the supplier has noted that it does not meet our mat spec to be normalized prior to Q+T.





RE: 4140mod Forged bar -Normalizing - is it still done?
RE: 4140mod Forged bar -Normalizing - is it still done?
RE: 4140mod Forged bar -Normalizing - is it still done?
RE: 4140mod Forged bar -Normalizing - is it still done?
Also Timken seems to list better properties to the core than q&t, which we need because we whittle the shaft down pretty far for bearings and couplings.
It seems we have to ask and pay for it these days.
RE: 4140mod Forged bar -Normalizing - is it still done?
We are going to bore it out..
RE: 4140mod Forged bar -Normalizing - is it still done?
RE: 4140mod Forged bar -Normalizing - is it still done?