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heat treating 17-4 ph

heat treating 17-4 ph

heat treating 17-4 ph

(OP)
Hello,

Does anyone know the tempering temperature to heat treat 17-4 ph stainless to 50+ Rc?

I know this is really hard, but water is going through it at about 15,000 psi..

any help would be appreciated,

thanks,
brent

RE: heat treating 17-4 ph

Rc 50 is in excess of the normal hardness attainable for
17-4.

RE: heat treating 17-4 ph

Pressure containing systems should be designed based on tensile and yield strength and not for hardness.  

RE: heat treating 17-4 ph

brents,

I agree with israelkk: You should not be designing for hardness in a pressurized system.  However, I would guess that you are using a conversion chart & desire to have a tensile strength around 250 ksi, based on your desired Rc50.  If so, you won't get there with 17-4 PH (according to Mil-Hdbk-5).  H900 Condition is 170ksi yield, 190ksi ultimate.

PH13-8Mo will get you a little higher; "Custom 465 Stainless" will go even higher.  Need to look at the whole picture, though - ductility might be a different requirement.

Pete

RE: heat treating 17-4 ph

Custom 465 is nice stuff, if you can find it, and if you can figure out how to connect to it.

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