HYDROGEN EMBRITTLEMENT RELIEF TREATMENT
HYDROGEN EMBRITTLEMENT RELIEF TREATMENT
(OP)
Hi All
I have parts from PH 17-7 SS with TH1050 (RC~38-40), it was passivated after machining but the vendor forgot to perform
HYDROGEN EMBRITTLEMENT RELIEF TREATMENT
I know that this process is to be done within 4 hours after passivation.
are those parts trash?
what can we do?
I have parts from PH 17-7 SS with TH1050 (RC~38-40), it was passivated after machining but the vendor forgot to perform
HYDROGEN EMBRITTLEMENT RELIEF TREATMENT
I know that this process is to be done within 4 hours after passivation.
are those parts trash?
what can we do?





RE: HYDROGEN EMBRITTLEMENT RELIEF TREATMENT
Perform the de-embrittlement thermal heat treatment and nondestructive test( wet fluorescent MT) after this treatment to verify no delayed cracking.
RE: HYDROGEN EMBRITTLEMENT RELIEF TREATMENT
However, if there was a need to chemically clean the parts before passivation then the part should be discarded if they are for aerospace or military use. It depends to what spec they were created. This is why mechanical cleaning process such as aluminum oxide blast with fine grit is preferred before passivation.
Or even best is to to heat treat and then completely final machine the part.
Sometimes it is customary to use aluminum oxide blast on the less accurate dimensions and final machining on precise dimensions.
RE: HYDROGEN EMBRITTLEMENT RELIEF TREATMENT