Hi All,

Please help me in interpreting on UCS-79(d). My interpreting is as below :

Material requires heat treatment when :
1. Resulting fiber elongation is more than 5% from the as rolled condition
2. Any of the following exist :
- Vessel is for lethal services
- material requires impact testing
- material thickness exceed 16mm
- reduction by cold forming from the as rolled thickness is more than 10%
- temperature of the material during forming is 250F to 900F.
It is my interpretation is correct.?

"P-1 group 1&2 materials may have fiber elongation as great as 40% provided none of the conditions above exist".This sentence make me confusing.


Appreciate any help on this.

Thanks & Regards,
Khairul

If none of the 5 conditions exist of UCS-79(d), then post cold forming heatreatment for P-No.1 and Group-No.2 materials may be waived off otherwise criteria is of 5%.

_________________
Thanks & Regards,
Nasir
Welding Engineer
DESCON Engineering Limited.
Lahore, Pakistan.
Mobile # 0092-336-4145402