Material selection for high temperature pin
Material selection for high temperature pin
(OP)
I want to select material for a pin operating at 550C. It is simple pin joint with pin under shear load. Please suggest suitable material for this application.





RE: Material selection for high temperature pin
RE: Material selection for high temperature pin
Diameter : 8 mm
Load : 2500 N (Pin is under Double shear)
Length : 50 mm
Design temperature : 550 C (Argon environment)
Thanks in advance
RE: Material selection for high temperature pin
RE: Material selection for high temperature pin
Is your recommendation based on the low shear stress and assuming a service life that is somewhat short? In general, this temperature usually calls for a higher alloy concentration for creep strength and resistance to graphitization and spheroidization. Thanks for any added basis for the selection.
RE: Material selection for high temperature pin
Yes. The relatively low shear load on the pin at 1020 deg F should allow acceptable use of this material at reasonable service life, with lowest cost. Upgrades in material could include ASME SA 193 Grade B16 material similar to 4140 with vanadium for elevated temp strength and creep strength or further upgrade to 410 ss.
RE: Material selection for high temperature pin
The 4140 steel can be used with no creep concerns to 1000 deg F because of the Mo and Cr contents. Recognizing that the service temperature is 1020 deg F versus 1000 deg F should still afford a good service life. I don't see any graphitization concerns because the Cr content is above 0.50% by mass. So, given the low stress in service this should be acceptable, as a minimum.
RE: Material selection for high temperature pin
RE: Material selection for high temperature pin
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RE: Material selection for high temperature pin
Metengr,
What is the higher temperature limit of ss410 for continuous operation.
RE: Material selection for high temperature pin
http://cartech.ides.com/datasheet.aspx?i=103&e...
Take a look at the creep/stress rupture data and see if this works for you. If you need more margin, you can upgrade further in pin material.
RE: Material selection for high temperature pin
Maui
RE: Material selection for high temperature pin
In my application the material is heated to 550C and kept for 50 hours then cools to room temperature(heating and cooling will be done at 25C/hr). It undergoes approx. 500 such type of cycles. Will it degrade the properties of ss410? Please suggest heat treatment temperature
Maui,
I have not worked out on exact hardness requirement, the pin joint has to work for approximately 500 times.
RE: Material selection for high temperature pin
RE: Material selection for high temperature pin
http://www.crucible.com/eselector/prodbyapp/plasti...
Maui