Need help with RAR abbreviation
Need help with RAR abbreviation
(OP)
I have a part that is carburized SCM420H (similar to SAE 4120). I have a report that states the case microstructure is "Tempered martensite RAR 1-2". I need to know what RAR means. I assume it is a retained austenite rating. Any details about this would be appreciated. Thank you for your help.
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.





RE: Need help with RAR abbreviation
What is the part?
RE: Need help with RAR abbreviation
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Need help with RAR abbreviation
RE: Need help with RAR abbreviation
Perhaps some helpful information;
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RE: Need help with RAR abbreviation
metengr's link shows that lab uses RAR = to your guess. Could it be a typo and should read RAR 1-2% instead of inches?
RE: Need help with RAR abbreviation
RE: Need help with RAR abbreviation
I think Carburize is correct - this is a rating according to an internal company specification. By the way, it can't be the OEM - that's ME! Now to comment to my supplier how much I think of their report that uses unexplained abbreviations, misspelled my company's name, etc.
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Need help with RAR abbreviation
RE: Need help with RAR abbreviation
RE: Need help with RAR abbreviation
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Need help with RAR abbreviation
RE: Need help with RAR abbreviation
Carburize - I prefer to limit public disclosure. If you are an ASM member, you can access the ASM member database and contact me directly.
Regards,
Cory
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Need help with RAR abbreviation
Thanks for the information on the RAR - if only the lab had just put 10 - 15% on the report!