4340 nitrogen levels
4340 nitrogen levels
(OP)
4340 has no nitrogen spec. Does anyone know a typical value?
Michael McGuire
http://stainlesssteelforengineers.blogspot.com/





RE: 4340 nitrogen levels
For BOF steels, typical range is 30-50 ppm
For EAF air melt, typical range is 40-120 ppm.
RE: 4340 nitrogen levels
RE: 4340 nitrogen levels
_____________________________________
"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year
RE: 4340 nitrogen levels
I'm doing some research on hydrogen embrittlement and hydrogen's interaction with dislocations. The dislocation density in martensite is a function of interstitial level, but some data I have for 4340 omits nitrogen level. So, in the VAR 4340 mentioned I will use the level suggested by TVP.
This gives a dislocation density of 1.5 x 10 (exp13)/cm2 if anyone is interested, as-quenched, of course.
Michael McGuire
http://stainlesssteelforengineers.blogspot.com/
RE: 4340 nitrogen levels
_____________________________________
"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year
RE: 4340 nitrogen levels
Michael McGuire
http://stainlesssteelforengineers.blogspot.com/