Material for Steam Valve Spindles 1

[GordonF]

We have experimented with various materials for valve spindles operating in steam at 540C including

Nitrided low allow steels (EN41B)
Nitrided 12Cr steels
Incolloy 800 HT

The most successful valve spindles have been a low alloy steel (AISI P20) coated with Stellite 6. We wish to manufacture more of these spindles unfortunately we cannot source AISI P20 readily. Do you know of a supplier of AISI P20 or could you advise of any similar low alloy creep resistant steel suitable for the application?

 

[luckymix]

Hi Gordon F,

Greetings. Have you used specially grain orientated forgings for such applications? And when you say successful, what sort of time frames have your spindles been in service? Have they bent slightly after excessive use? Stop valves or governor/control valves?

have you tried (for your material)?

Latrobe Steel Company, Klanicac@timken.com,

http://www.timkenlatrobe.com

Best regards

 

[EdStainless]

P20? Do you mean the 2% Cr tool steel? You might also consider H13.
trey

http://www.crucibleservice.com

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