Casting equal to P92 pipe or F92 forgings
Casting equal to P92 pipe or F92 forgings
(OP)
Does anyone know of a casting material specification which is equal to P92 pipe or the ASTM A-182 F92 forging specification?
Thanks for your help in advance.
Peaseman
Thanks for your help in advance.
Peaseman





RE: Casting equal to P92 pipe or F92 forgings
RE: Casting equal to P92 pipe or F92 forgings
Thanks for the info. Could you please provide me with the Code Case number?
Thanks
RE: Casting equal to P92 pipe or F92 forgings
Sure, the ASME Code case number is 2179-3, with an expiration date of 10-2-05. The code case applies to seamless 9Cr-2W tubes, piping and forgings. Supplied as normalized and tempered or quenched and tempered with a maximum hardness of 250 BHN.
RE: Casting equal to P92 pipe or F92 forgings
I guess that the code case you mentioned lists the max allowable stress values, if so could you give me the values at 575°C and room temp.
Thanks
RE: Casting equal to P92 pipe or F92 forgings
From P J Ennis "creep strengthening mechanisms in 9-12% chromium steels" 2004,regarding P92 after exposure to service temps above 600C, "Although not seeming to have a detrimental effect on creep rupture strength ( indeed W additions are beneficial for the long term strength) the rather large Laves phase particles are responsible for a loss of room temperature ductility and impact strength"
RE: Casting equal to P92 pipe or F92 forgings
Allowable stress @ RT
25.7 Ksi, tube/pipe and forgings
@1050 deg F (566 deg C)
17.2 Ksi, tube/pipe and 16.6 Ksi for forgings
@1100 deg F (593 deg C)
13.6 Ksi, tube/pipe and 13.0 Ksi for forgings
For your specific temperature you can interpolate the value.
RE: Casting equal to P92 pipe or F92 forgings
RE: Casting equal to P92 pipe or F92 forgings
I've seen a lot of cast flanges used, but not sure which code. Where is the ASME and API requirements to use forged flanges?
RE: Casting equal to P92 pipe or F92 forgings