Hi,Thus sa312 tp 316 has moly therefore moly is a promoter for ferrite and if there is excess fn in weld metal after it causes hardness and chances for brittle fracture increases that is why we need to check fn no. For 316Thanks--On 10-Apr-2018 5:41 PM, "Kannayeram Gnanapandithan" <kgpandithan@gmail.com> wrote:what is the reason for Hot crackingTHANKS & BEST REGARDS,KG.PANDITHAN, BE, IWE, AWS-CWI, CSWIP 3.1,CONSULTANT-WELDING & QUALITYMobile no: +919940739349On Tue, Apr 10, 2018 at 4:51 PM, Lu, Feng <luf@zachrygroup.com> wrote:3 ~ 8% ferrite are required in the weld to prevent hot cracking
Feng Lu, Ph.D., NDE Level III
Metallurgy and Welding Engineer
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From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Kannayeram Gnanapandithan
Sent: Tuesday, April 10, 2018 5:56 AM
To: materials-welding <materials-welding@googlegroups.com>
Subject: [BULK]Re: [MW:27666] Stainless steel (SA 312 TP 316L) welding
what is the necessity for ferrite testing on 316L
THANKS & BEST REGARDS,
KG.PANDITHAN, BE, IWE, AWS-CWI, CSWIP 3.1,
CONSULTANT-WELDING & QUALITY
Mobile no: +919940739349
On Tue, Apr 10, 2018 at 4:16 PM, Perumal Govindan <perumalgovindan@gmail.com> wrote:
Hi Prasad,
Ferrite testing is required when it is mentioned in the Client / Project Welding / Construction Specification.
With Kind Regards
P Govindan
On Tue, Apr 10, 2018 at 11:24 AM, 'Shashank Vagal' via Materials & Welding <materials-welding@googlegroups.com> wrote:
NO
On Sunday, 8 April 2018 6:41 PM, Prasad Rode <purode333@gmail.com> wrote:
Dear sir,
I am going to do PQR for SA 312 TP 316L pipe to pipe of 6" and 7.11mm thickness.
I want to know that, i have to go for ferrite testing or not ?
If not, when it is essential to ferrite testing?
Regards
Prasad
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