I am not quite sure about the yield but you can find allowable stress in the Appendix A of ASME B31.3 Process Piping for over 1000 F.
Also your question made me think, why do you need the yield stress for over 1000 F?
Frank,
Calgary
Frank,
ASME B31.3 now allows an alternative allowable stress for occasional loads for temperatures greater than 800F. However it references the yield strength at temperature in Table Y in Sec II Part D. Unfortunately the table goes to 1000F and my line is 1050F.
I have several boiler OEM tube brochures back in the home office that date back about 25 years ago or so and contain actual mechanical property (tensile test and creep rupture) data for their tubing material. This was in the days when technical brochures meant something. I can check it tomorrow.
You have better records than I do, but may be properties certified by a standard writing body are better than a manufacturers brochure.
Sorry but if ASME wants to be the international standard it claims to be, it needs do to more than just change the words on the cover and leave the rest the same as always.
athomas236;
I agree. I am sure you have heard the expression that once you get an elephant to move you better get out of the way. Well, one of these days I hope the elephant will begin to move.
corky48;
The value I picked off of the graph indicates a YS of 18 Ksi at 1000 deg F for P11 material. Keep in mind that there is variability in properties, and there is no indication if these values were averaged or minimum strength properties. However, the 1.25 Cr - 1/2 Mo steels do see a noticeable drop-off in mechanical properties above 1025 deg F versus 2.25 Cr- 1 Mo alloy steels.
