×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

4340 nitrogen levels
2

4340 nitrogen levels

RE: 4340 nitrogen levels

Based on information I have seen and a project that I was involved with regarding low alloy steel -

For BOF steels, typical range is 30-50 ppm

For EAF air melt, typical range is 40-120 ppm.

RE: 4340 nitrogen levels

I concur with the ranges provided by metengr.  If the 4340 goes through vacuum degassing after the ladle station in an EAF process, then definitely toward the low end, 40-70 ppm.

RE: 4340 nitrogen levels

Just curious,why are you looking for Nitrogen in 4340 grade please?

_____________________________________
"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

(OP)
Arunmrao
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

As always, you deserve a star for your pioneering work.

_____________________________________
"It's better to die standing than live your whole life on the knees" by Peter Mayle in his book A Good Year

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources