9Cr Carbon Steel @ High Temperature
9Cr Carbon Steel @ High Temperature
(OP)
Does anyone have information they could share on the tensile properties (yield strengths) and other mechanical properties for 9Cr low alloy carbon steel (in particular SA 335-P9) at elevated temperature (in excess of 1000°F)?
Thanks!
~NiM
Thanks!
~NiM





RE: 9Cr Carbon Steel @ High Temperature
Typical Tensile Properties;
@ 1100 deg F - UTS is 41 Ksi, 0.2% YS is 23 Ksi
@ 1300 deg F - UTS is 18.5 Ksi, 0.2% YS is 10.5 Ksi
@ 1500 deg F - UTS is 10 Ksi, 0.2% YS is 3.5 Ksi
Creep and Rupture Properties
Stress to cause 1% def in 100K hrs
At 1100 deg F, the stress is 5.8 Ksi
At 1200 deg F, the stress is 2.6 Ksi
At 1300 deg F, the stress is 1 Ksi
Stress to cause Rupture in 10,000 hrs
At 1100 deg F, the stress is 10.5 Ksi
At 1200 deg F, the stress is 5.5 Ksi
At 1300 deg F, the stress is 2.5 Ksi
RE: 9Cr Carbon Steel @ High Temperature
~NiM
RE: 9Cr Carbon Steel @ High Temperature
RE: 9Cr Carbon Steel @ High Temperature
Thanks for the information. However, I'm investigating a runaway temperature failure. The normal temperature should never exceed 850°F and there is a good possibility the tubes I'm examining saw 1600-1700°F. (NOT a pretty sight...)
~NiM
RE: 9Cr Carbon Steel @ High Temperature
RE: 9Cr Carbon Steel @ High Temperature
Also, when I mention a temperature, I'm just guessing at the firebox temperature. The actual tube temperature may have been cooler by a tad bit, but not much. If anyone has good information regarding temperatures and failures in this material, I'm all ears.
Thanks everyone.
~NiM
RE: 9Cr Carbon Steel @ High Temperature
RE: 9Cr Carbon Steel @ High Temperature
~NiM