Google Groups
Subscribe to Materials & Welding
Email:
Visit this group

Wednesday, November 3, 2010

R: additional detail[MW:8042] effect of PWHT Temperature at 600 DEG CELSISIUS ON SS 316L

PWHT  on austenitic stainless steels  (like 316,304) is rarely applied ad “stress relieving”.

Sometime applied in medium-small size pressure components ( welded).

The temperature are in the range 205-480 °C max, normally carried out ad 300 °C but only with the scope to get an effective stress-relieving.

Heat treatment carried out in dedicated & ventilated  (electric furnaces), in order to avoid or control possible distortion/warpage.

 

 Joseph B  ,

welding & material eng.

 


Da: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] Per conto di Karthik
Inviato: mercoled├Č 3 novembre 2010 8.45
A: materials-welding@googlegroups.com
Oggetto: 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.

 

--
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.




This e-mail contains privileged and confidential information intended for the use of the addressees named above. If you are not the intended recipient of this e-mail, you are hereby notified that you must not disseminate, copy or take any action in respect of any information contained in it. If you have received this e-mail in error, please notify the sender immediately by e-mail and immediately destroy this e-mail and its attachments.

No comments:

Blog Archive