Re: additional detail[MW:8038] effect of PWHT Temperature at 600 DEG CELSISIUS ON SS 316L

hi, If you PWHT with Austenitic SS (SS316) internal sensitation happened at 450 to 600 degrees which will reduce the corrosion resistance of SS316(chromium becomes chromium carbide). But in your case it is SS316L ,for this it may PWHT since 'L" grade has stabilising elements like Ti,Cb,Nb which will help to reduce the sensitation. So if you are not ready to dismantle the internal for PWHT,you may go with SS316L internal for PWHT.  Thanks & Regards, (Karthik) Karthikeyan.S QA/QC Manager Getabec Energy Co.,Ltd. 379,Moo6,Soi8,Nikhomphatana, Rayong-21180, Thailand. Phone: 0066 38 897035-8 (Off) Fax: 0066 38 897034 Hand Phone: 0066 892512282 --- On Wed, 11/3/10, asad azmi <azmiasadayub@gmail.com> wrote: From: asad azmi <azmiasadayub@gmail.com> Subject: [MW:8034] effect of PWHT Temperature at 600 DEG CELSISIUS ON SS 316L To: materials-welding@googlegroups.com Date: Wednesday, November 3, 2010, 1:44 PM Dear All,   Greetings.   Contractor is doing PWHT of the Carbon Steel Vessel along with  SS316L  INTERNALS ( BEAMS, CHANNELS) Bolted with the Vessel.  PWHT temperature is 600 DEG CELSIUS.   Pls  suggest me whether it is allowed. what will be the effect on mechanical proerties/corrosion ressiatnce  proerties of SS 316L becuase of the PWHT Temperature.   Thanks in advance for your valuable suggestions.   Regrads -- 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.

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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.