Fig.UCS-66 (g)(3) Normalized rolling condition 2

[pvesseleng]

Hi,
ASME Section VIII Div.1 Fig.UCS-66 (g)(3) states that
"Normalized rolling condition is not considered as being equivalent to normalizing"

Does it mean that if heads formed in normalizing temperature, can not be assumed as normalized.

Regards

 

[metengr]

pvesseleng;
Yes, you are correct. Normalizing is a separate heat treatment operation.

 

[deanc]

Agree with metengr.

If you are having heads made see SA-20(6.4).

Think I would get more info. Perhaps the item is formed at normalizing temp. and then held there for a time after forming. Would this be the correct end result?

 

[metengr]

Yes, provided the time at temperature and cooling rate has been documented.

 

[pvesseleng]

Lets assume the item is formed at normalizing temp. and then held there for a time after forming. Results; time and temperature recorded on material test report.
Is this the same situation explained in ASME Section VIII Div.1 Fig.UCS-66 (g)(3)?
thank you for your valuable comments

 

[metengr]

The normalized rolling condition means that the material is at least heated to some temperature above the lower critical transformation temperature (AC₁) for working and cooled in air.

Normalizing heat treatment occurs when the material is heated about 100 deg F above the upper critical (AC₃) transformation temperature ( assuring 100% austenitizing treatment) and held for a specific period of time and cooled or liquid quenched, if necessary.

 

[metengr]

or liquid quenched, if necessary.

The above statement was not part of the thread response above. The thread should have ended with ...and cooled in air.