Decarburization of T11 HX Tube
Decarburization of T11 HX Tube
(OP)
I am examining a 3/4" diam tube, fairly heavy wall. I see about 0.008" decarb on the outside (boiler water) but none on the ID (hydrocarbons with some H2).
The structure looks well cooked from the original heat treatment, and service temp was not high enough to alter it. Hardness is about 160HV.
Is this uneven decarb a common manufacturing condition?
The structure looks well cooked from the original heat treatment, and service temp was not high enough to alter it. Hardness is about 160HV.
Is this uneven decarb a common manufacturing condition?
"If you don't have time to do the job right the first time, when are you going to find time to repair it?"





RE: Decarburization of T11 HX Tube
http://journals.cambridge.org/action/displayFullte...
RE: Decarburization of T11 HX Tube
I found a takeaway of uneven decarburization caused by annealing, in spite of the puzzling write-up.
"If you don't have time to do the job right the first time, when are you going to find time to repair it?"