Determining DBTT from Limited CVN Results (17-4PH)
Determining DBTT from Limited CVN Results (17-4PH)
(OP)
Hi,
I'd like to know an approximate DBTT for 17-4PH in the H1025 condition. I've found some limited CVN data (Link) but this doesn't give a clear DBTT. Is there a specific impact energy that can be considered a minimum for ductile behavior?
I'd like to know an approximate DBTT for 17-4PH in the H1025 condition. I've found some limited CVN data (Link) but this doesn't give a clear DBTT. Is there a specific impact energy that can be considered a minimum for ductile behavior?





RE: Determining DBTT from Limited CVN Results (17-4PH)
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P.E. Metallurgy, Plymouth Tube
RE: Determining DBTT from Limited CVN Results (17-4PH)
http://www.interlloy.com.au/our-products/stainless...
RE: Determining DBTT from Limited CVN Results (17-4PH)
RE: Determining DBTT from Limited CVN Results (17-4PH)
Your link is not working for me.
RE: Determining DBTT from Limited CVN Results (17-4PH)
RE: Determining DBTT from Limited CVN Results (17-4PH)
It works for me. As you scroll down the page there is a more complete list of CVN values for 17-4 PH based on HT condition and temperature range from 10 def F down to -320 deg F.
RE: Determining DBTT from Limited CVN Results (17-4PH)
Typically people use H1050 down to -40 and H1150 down to -125F (or so)
This agrees with NASA data from 1967.
I will caution you that the transverse properties can be much worse than Longitudinal.
I have worked on projects where T was critical and we used extensive HT procedures to get it (homogenize, cool, anneal, cool, over age, cool age, cool, form and machine, anneal, cool, final age, cool).
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P.E. Metallurgy, Plymouth Tube
RE: Determining DBTT from Limited CVN Results (17-4PH)
BTW, I was able to view metengr's link on my phone.
RE: Determining DBTT from Limited CVN Results (17-4PH)