17-4PH Valve Stem material
17-4PH Valve Stem material
(OP)
Which is the best A564 Type 630 condition for Valve stem material,can we us condition H1075,what is the Max. & Min temp. of various conditions of Type 630,is there any restriction in using Type 630 as Stem material, appreciate your reply, Thank you





RE: 17-4PH Valve Stem material
Second, what type of valve and service conditions?
RE: 17-4PH Valve Stem material
RE: 17-4PH Valve Stem material
RE: 17-4PH Valve Stem material
H1075 had higher yield strength & cheap$ when compared to XM-19.
17-4 PH Stem are being used in Ball valves, so could clarify "Which is the best A564 Type 630 condition for Valve stem material,can we us condition H1075,what is the Max. & Min temp. of various conditions of Type 630,is there any restriction in using Type 630 as Stem material," appreciate your reply, Thank you
RE: 17-4PH Valve Stem material
I don't see a prohibition for using 17-4PH other than the higher strength heat treatment could lead to increased susceptibility to environmentally assisted cracking. Also, the higher strength will result in less ductility which could effect performance as a valve stem. The maximum service use temperature I have seen for this material is 600 deg F.
RE: 17-4PH Valve Stem material
RE: 17-4PH Valve Stem material
RE: 17-4PH Valve Stem material
RE: 17-4PH Valve Stem material
The galling resistance of Nit50 is an added bonus that often is a great advantage.
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P.E. Metallurgy, Plymouth Tube
RE: 17-4PH Valve Stem material