Maximum allowable temperature
Maximum allowable temperature
(OP)
For carbon steel operating at high temperature, what is the maximum recommended allowable temperature to prevent damage by creep?
corus
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Maximum allowable temperature
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RE: Maximum allowable temperature
Don’t forget that yield stress and modulus of elasticity are also temperature dependent.
RE: Maximum allowable temperature
Some carbon-manganese and low-alloy steels have temperature limits up to 650C (1200F), albeit with very low design tensile strength.
What is the steel specification?
RE: Maximum allowable temperature
Does operating at these high temperatures have an effect on the material properties of the steel over time, besides the effect of strain accumulation from creep?
corus
RE: Maximum allowable temperature
StephenA
RE: Maximum allowable temperature
I’m not familiar with your Grades 43 and 50. FYI, the steel I’ve mentioned above has a tensile strength of 410MPa and its composition is 0.22%C and 1.7%Mn with up to 0.3%Cr, 0,1%Mo, 0.5%Ni and 0.5%Cu.
According to the Australian standard AS4100-1998 “Steel structures”, at 350C the yield stress ratio is 0.80 and the modulus of elasticity ratio is 0.85. However, according to AS1210-1997 “Pressure vessels” the design tensile strength at 350C is just 79MPa.
Is your application for a pressure vessel or is it for structural steel in a high temperature environment.
RE: Maximum allowable temperature
For dbuzz, the answer to both questions is yes.
Is there information on the effect of age on steel and the possible degradation of material properties, regardless of whether or not it's operating condition was at high temperature?
corus