Low hardness at weldment and HAZ
Low hardness at weldment and HAZ
(OP)
What should we do if we find low hardness of fired heater tube? I have no information during fabrication. This might be occured several years ago without thickness measurement.
For further comment, please advise me about documents to study about replica in detail.
For further comment, please advise me about documents to study about replica in detail.
RE: Low hardness at weldment and HAZ
RE: Low hardness at weldment and HAZ
RE: Low hardness at weldment and HAZ
RE: Low hardness at weldment and HAZ
I did not see any detrimental effect in past operation. This is the first time that I check hardness at such location.
RE: Low hardness at weldment and HAZ
The other case is overheating or burning of this steel. If this is so - thermal heating wont restore mechanical properties.
To find out the reason I recomend you to make microstructure testing.