431SS losing it quality
431SS losing it quality
(OP)
Good afternoon
I am tempering 431 in the range that adversly effects corrosion resistance
I suppose its the chrome thats depleted
Final hardness is 42 Rc
My part runs at 40,000 PSI in pure water
Would pressure also deplete corrossion resistance
I am tempering 431 in the range that adversly effects corrosion resistance
I suppose its the chrome thats depleted
Final hardness is 42 Rc
My part runs at 40,000 PSI in pure water
Would pressure also deplete corrossion resistance





RE: 431SS losing it quality
Pure water inside at 40,000 PSI no temp
RE: 431SS losing it quality
If you are in that range you not only loose corrosion resistance but the alloy will be very brittle.
42 RC, you get that with 1100F temper (or maybe 1050F), and good toughness and corrosion resistance.
Did you descale and passivate? This is necessary.
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P.E. Metallurgy, Plymouth Tube
RE: 431SS losing it quality
No.
RE: 431SS losing it quality
And we are getting crack failure in these parts
They are vac heattreated and we will work on your advise
thanks a heap
RE: 431SS losing it quality
Raise the temper to 1100F, and get the surfaces clean.
How much general corrosion (rusting) is there?
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P.E. Metallurgy, Plymouth Tube
RE: 431SS losing it quality
and yes corrosion is there
as no passivation was done
Will beat on them to do the chemical corrosion prevention
Thank you