Saturday, April 13, 2013

Re: [MW:17368] RE: 17261] Welding of E316L material -Reg

it's not suitable to weld 316L with electrode 316-16 as this case to increase carbon content which case forming chromium carbide (Cr23C6) which case intergrainual corrosion ( sensitization)
( make grain boundary depletion of chromium )




On Sat, Apr 13, 2013 at 5:45 AM, pgoswami <pgoswami@quickclic.net> wrote:
Mr. Pandithan,
 
My Opinion as follows:-
 
 
C is 0.04% Max for SMAW electrodes. The Ferro alloys added through the flux also contributes "C" in the weld. If required electrode manufacturers could  formulate welding electrodes , with max "C"  below 0.04%, but it would be costly.
 
For GTAW filler, the chemical composition of the wire = the chemical analysis of the weld puddle. No alloys are added separately, except that alloys could be lost through turbulence or improper shielding. Hence achieving base filler with Max "C" of 0.03% is very practical, with the available stainless manufacturing routes.
 
Hence thinking all the pros and cons  the  above suggested limits   are  agreed on by  ASME  Sec-II ,Pt-C Code committee.
 
Perhaps  some  opinions from   consumable manufacturing industries would be appreciated.
 
Thanks
 

Pradip Goswami,P.Eng.IWE

Welding & Metallurgical Specialist

Ontario, Canada.

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net

 


From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of kannayeram gnanapandithan
Sent: Thursday, April 11, 2013 8:01 AM
To: materials-welding
Subject: Re: [MW:17352] RE: 17261] Welding of E316L material -Reg

Dear Experts/Mr Goswami
In TIG welding rod ER316L, carbon is kept at max 0.03, In SMAW welding electrode E316L, carbon is kept at max 0.04 in all LOW Carbon electrodes. What is logic behind it
Generally for Carbide formation, minimum carbon require is 0.04
Pandithan
Welding Consultant


On Tue, Apr 2, 2013 at 2:36 PM, kannayeram gnanapandithan <kgpandithan@gmail.com> wrote:
As per SFA 5.9,   C is max .03% for ER 316L,, in this case what should be done?

Pandithan
Welding Consultant


On Tue, Apr 2, 2013 at 8:14 AM, pgoswami <pgoswami@quickclic.net> wrote:
Hi Siva,
 
If the intended service for S.S 316L is for corrosive environments , then the answer is NO.
 
Like base metals , welding consumables for SS 316 could be manufactured as "Dual Certified Grades". Example as per SFA 5.4
  • For E-316-XX-- Maxm "C" allowed is -0.08%
  • For E-316L-XX-- Maxm "C" allowed is -0.04%
If the electrode manufacturer " Restricts C to  0.04%, yet the  all mechanical test as per SFA 5.4  are passed, then  this grade could be certified as "Dual Certified Grade" , e.g -  E316/E316L-XX. Please check this point with electrode supplier. If the answer is yes then welding consumable certified as  E316/E316L-XX, are safe to use for welding S 316L.  However the consumable must meet any corrosion test, say ASTM A-262 Practice E, if required.
 
Hope this will guide you well to cope with the problem.
 
Thanks.
 

Pradip Goswami,P.Eng.IWE

Welding & Metallurgical Specialist

Ontario, Canada.

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net

 


From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of siva subramanian
Sent: Monday, April 01, 2013 11:02 AM
To: materials-welding@googlegroups.com
Subject: [MW:17261] Welding of E316L material -Reg

Dear sirs,
                 I have one clarification regarding welding of SA240 GR 316L material.
May I use E316-16 to weld 316L material.If it is not possible means What is reason behind?

Please Clarify me.

Always Thankful,
A.Sivasubramanian

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