To make required strength of ASTM A355 Gr P-11 , manufacturer use Q+Temper heat treatment.
PWHT above the tempering temperature will decrease the strength of material.
thx
2010/11/17 thulaib arakkal <thulaibwelding@gmail.com>
hi friends, in our contract specification it says, pwht temperature should be less than tempering temperature of the material (ASTM A335 GrP-11). why is this requirement. our P11 pipes have tempering temperature of 700 deg celsius ,and as per our WPS pwht temp is 720 deg celsius.. So is it okay to do pwht at 720 deg celsius. will there be any problem if PWHT temperature exceeds tempering temperature --
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
No comments:
Post a Comment