SA-36 Temperature / Yield 2

[Shark21]

I am trying to locate (thus far unsuccessfully) data that states that A-36 material is good for up to 1300 degrees. This is not in a pressure environment; it is for an exhaust vent. So far everything that I've come across says that it is only good for 750 - 850 F before creep kicks in. If that is the case, then what would the yield be at 1300F?

Thanks in advance.

 

[metengr]

At 1300 deg F the yield strength would be around 15% of the yield strength at ambient temperature.

Source - report on fire exposure of structural steel below

http://www.mace.manchester.ac.uk/pr...HotRolledCarbonSteel/mechanicalProperties.htm

Your main concern will be severe oxidation at 1300 deg F for carbon steel.

 

[mw1st]

I wouldn't use this steel for applications that are subject to prolong temperature above 800F, because this produces graphitazation - pearlite will slowly transform to graphite rendering steel brittle.

 

[metengr]

Graphitization damage is a risk, not a given, in comparison to creep deformation and severe oxidation.

 

[Shark21]

Thanks all. Is there a material recommended which can withstand that kind of temperature?

 

[metengr]

Yes, you can use a ferritic stainless steel - Type 439 - is common for exhaust ductwork on gas turbines.

 

[Shark21]

Thanks again metengr. You were a big help.