What are the components you are heat treating?
This may be a long shot, but I have seen "IR" prefixed on Ingersol-Rand steel grades and material specs for rock drill / hammer tool steels. These are usually proprietary grades and / or modifications of AISI alloy steels or carburizing steels...
Thank you all for your valued comments.
With respect to the importance of specimen "quality" discussed by Ed Stainless, during this exercise some debate has arose as to the merit of using ground notches vs broached notches.
One school of thought is that notches manufactured by grinding...
These may be too general questions but I will give it a go.
What would be considered the normal spread of values obtained between the 3 Charpy specimens in a test?
Does the expected variation depend upon the overall level of toughness eg 10J vs 100J?
To define a little further, the case in...
