Dear Mr.Pradip Goswami ,
-- Thank you for your reply with the Kobelco Catalogue and it is very useful.
Could you please share Preheat methods for these High alloys as requested in my below mail .
Regards,
Saravanan.
On Sun, Dec 15, 2013 at 10:59 PM, pgoswami <pgoswami@quickclic.net> wrote:
--Hi Saravanan,Usually FCAW consumables for DSS are formulated to work with 100%CO2 and/Or with mixed gases, e.g 80:20, Ar+Co2 or 90:10 Ar+CO2. You need to check with consumable manufacturer. Shielding gas changes, weld metal properties, hence is an essential variable, calling for requalification of PQR.Usually 100%Co2 shielding will have lesser notch toughness in weld metal than with Ar+CO2 shielding. This is due to more oxygen in the weld.The ideal shielding gas will be Ar+Co2, for the optimum properties.See this attachment page 12-14.ThanksPradip Goswami, P.Eng,IWEWelding & Metallurgical SpecialistOntario, Canada
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Saravanan Sornam
Sent: Sunday, December 15, 2013 5:51 AM
To: materials-welding@googlegroups.com
Subject: [MW:19600] Duplex UNS 31803 - FCAW Shielding Gas--Also, share the best Preheat method for high alloy steels to remove moisture and for high thk joint applications .which shielding gas is best applicable for FCAW-GS for welding Duplex material grade UNS 31803 ( P No. 10H ) and why ?Dear Welding Experts ,Could you please share quite urgently that,
Awaiting for your reply.Thanks and Regards,Saravanan,Korea.
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