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Re: [MW:14432] WPS on Forged Steel

By Materials & Welding
Dear Sir,
 
My problem is not with grade of the steel (S355J2G3). The TPI insists on WPS using forged steel of the above grade. There are some agencies to supply the rolled steel of the same grade, but no one responding for forged steel of S355J2G3.
 
Your comment on the above, please.
 
Regards,
A Megnath
----- Original Message -----
From: pgoswami
Sent: Thursday, May 31, 2012 4:01 PM
Subject: FW: [MW:14427] WPS on Forged Steel

Hi Megnath,
 
Please see two attachments for your reference. My feel is this grade of steel could be supplied in both shapes, either as bar or plate. You need to confirm the same from supplier. The other choice is perform a comprehensive PMI of the forged bar, and calculate the carbon equivalence (CE) and match the same  with the composition and calculate CE of the  proposed plate to be supplied. If both the values are close it would give confidence to the TPI. 
 
Hope this would be of help.
 
 
Thanks.
 

Pradip Goswami,P.Eng.IWE

Welding & Metallurgical Specialist

Ontario, Canada.

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net

 

 
On Wed, May 30, 2012 at 2:00 PM, Lab <lab@cochinshipyard.com> wrote:
Dear Friends,
 
In our production unit, we would like to make butt weld between forged steel grade of S355J2G3, a round shaped object. The Third part Inspection (TPI) agency which clears the joint, insists us to perform WPS on similar material before production welding. This particular material was imported from other country long back and we could not thick about WPS when we purchased. It is not possible for us to get the similar material (same grade & same condition) suitable for WPS as well as WPQ and no response from the suppliers when contacted for supply of small quantity.
 
At last one supplier came forward and ready to supply S355J2G3 of rolled and normalized plate.
 
When we went to TPI with the proposal of making WPS with rolled plate, they are not convinced as the properties of forged and rolled steel even after Normalizing, are different and insisting us to do WPS test on forged steel of same grade.
 
Request the forum to provide guidelines to get rid of this situation or from where I get small quantity of material of similar grade, condition in India to arrange for WPS.
 
Regards,
Megnath
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