Re - Normalizing Sec VIII - 1 Interpretation
Re - Normalizing Sec VIII - 1 Interpretation
(OP)
I found two interpretations in the latest volume ( 63 ) that pertain to normalizing P1 material, interesting. The interpretations are VIII-1-15-06 and 08.
06 Q- If a plate is normalized once at the mill and then is subsequently normalized again during manufacturing, does UCS 85 (c) require test specimens that account for both normalization cycles?
R - Yes
Q2 - In this instance, does the Code require a separate set of test specimens that represent only the first normalization?
R - No
08 Q - Consider a vessel that will have the heads fabricated from SA 516 plate normalized at the mill. During fabrication, the heads will subsequently be normalized after forming and the entire vessel postweld heat treated at a temperature below the lower transformation temperature. Does UCS 85(c) require that the test specimens for the head material account for both cycles of normalization?
R- Yes
Q2 In accordance with UCS 85(f), do the test specimens also have to be subjected to the PWHT condition for the vessel?
R - No.
For fellow fabricators, I'm interested to know whether or not, for you, this is a departure from past practice?
For metallurgists, I'm interested in your opinion as to whether or not representing the second normalizing cycle is justified?
Thanks
06 Q- If a plate is normalized once at the mill and then is subsequently normalized again during manufacturing, does UCS 85 (c) require test specimens that account for both normalization cycles?
R - Yes
Q2 - In this instance, does the Code require a separate set of test specimens that represent only the first normalization?
R - No
08 Q - Consider a vessel that will have the heads fabricated from SA 516 plate normalized at the mill. During fabrication, the heads will subsequently be normalized after forming and the entire vessel postweld heat treated at a temperature below the lower transformation temperature. Does UCS 85(c) require that the test specimens for the head material account for both cycles of normalization?
R- Yes
Q2 In accordance with UCS 85(f), do the test specimens also have to be subjected to the PWHT condition for the vessel?
R - No.
For fellow fabricators, I'm interested to know whether or not, for you, this is a departure from past practice?
For metallurgists, I'm interested in your opinion as to whether or not representing the second normalizing cycle is justified?
Thanks





RE: Re - Normalizing Sec VIII - 1 Interpretation
RE: Re - Normalizing Sec VIII - 1 Interpretation
The above mentioned interpretations may not be straight forward valid in the light of UCS-85(i). Second normalization need not be accounted for if second normalization temperature is below or equal to the first normalization, I read the UCS-85(i) this way. Any comment please?
Nasir
Welding Engineer
DESCON ENGINEERING LIMITED
PAKISTAN
RE: Re - Normalizing Sec VIII - 1 Interpretation
So, if the final normalizing (austenitizing and air cool heat treatment) is performed at or above previous treatments by the mill or otherwise, the last performed at or a higher temperature from preceding heat treatments re-sets the material properties.