Hello Mr. Gandhi
Can you explain how you got a ditch type structure in IGC Practice "E" ??. Practice E is based on visual examination of a bent specimen ! I think you must have condcuted IGC Practice A test. Also before you started the PQR, did you verify the Mill TC of the SS plates you used ? Were the consumables used IGC tested by the consumable manufacturer ? In place of water quenching why don't you just sprinkle water or cool it with a wet cloth after every pass to maintain the interpass temp. Regards Prem Nautiyal
--- On Mon, 3/19/12, Karthik <karthik6684@yahoo.com> wrote:
From: Karthik <karthik6684@yahoo.com>
Subject: Re: [MW:13925] WATER QUENCHING OF S.S. PQR
To: "materials-welding@googlegroups.com" <materials-welding@googlegroups.com>
Date: Monday, March 19, 2012, 1:09 PM
Hi, No need to do quenching. Normally interpass temperature for Austenitic Stainless steel will be 170 degrees maximum. You can monitor the Interpass temperature by Infrared thermometer and if it reach nearer to 170 degrees then stop welding and let it cool down and continue welding. we did like this and we found no defect/problem in PQR.
Thanks & Regards,
(Karthik)
Karthikeyan.S QA/QC Manager German-Thai Boiler Engineering Cooperation Limited. Rayong Factory ; 379 Moo.6 Soi 8, Tambol Pananikom, Nikompattana, Rayong 21180 THAILAND Tel : +66 38 897 035-9 Ext. 137 Fax : +66 38 897 034 Hand Phone: 0066 892512282
From: CHINTUKUMAR GANDHI <cgandhi1975@yahoo.com>
To: materials-welding@googlegroups.com
Sent: Saturday, March 17, 2012 6:03 PM
Subject: [MW:13910] WATER QUENCHING OF S.S. PQR
| Dear Experts, Is it advisable to water quench the Austenitic S.S. PQR (6 mm. Base Metal Thk., SA 240 Tp. 316L) subsequently after each pass and before proceeding for next pass? Same procedure was followed during PQR of 6 mm. to 10 mm. base metal Thk. SA 240 Tp. 304L PQR to control the inter pass temp. max. 100º C. But, unfortunately, the PQR was failed in IGC test as per ASTM A 262 Pr. E. Intermetallic ditches observed in weld metal, and in H.A.Z. and Parent Metal- Ditch structure observed. Also one root bend was failed in testing. What will be the reason? Which precautions to be taken during qualification of 6 mm. Base Metal Thk., SA 240 Tp. 316L PQR and what will be the qualified max. range of base metal thickness? Please share your experience with me. Thanks & regards, C. R. GANDHI (Welding Engineer) | -- 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.
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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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