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Home > Forums > Materials Engineers > Activities > Tribology engineering Forum

Recommendation for valve material

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gatchaman (Mechanical)

30 Jul 10 12:47

I'm looking for a material recommendation on a ball/seat combination to use for a ball valve.

The valve cycles 1 time in 1 second, every 30 seconds.  Pressure is 1500psi, temperature at 450F, medium is Nitrogen.

We tested the valve using a carbide coated ball with a nickel aluminum bronze seat and valve lasted only 2 days.  The nickel aluminum bronze showed heavy wear/galling on the seat.

btrueblood (Mechanical)

30 Jul 10 14:05

Look into Nitronic 60. Even if you don't use this specific alloy, the data bulletin (see link below, you want the 40-page pdf) has a wealth of data on galling between a variety of alloys.

http://www.hpalloy.com/alloys/descriptions/NITRONIC60.html

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