Mr. Prabhu,
CD3Mn is the cast form of duplex 2205, with Cu(1% max). As you know 2005 is the workhorse of duplex family and is relatively easier to weld, than other duplex alloys. However cast structures may not be all that easy to weld and to get the required properties. Based on the extent of welding and clients' requirement one may have to perform solution anneal(as required).
By default SFA 5.4 E-2209 is the most matching electrode, and should have a guaranteed copper addition of 0.75% max in the weld.Otherwise weld may lack corrosion resistance in strong acid medias.
The following literature might be of interest to you(see the highlighted text).
Thanks.
Pradip Goswami,P.Eng.IWE
Welding & Metallurgical Specialist & Consultant
Ontario,Canada.
Email-pgoswami@sympatico.ca,
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of fredric prabu
Sent: Monday, May 30, 2011 1:21 AM
To: materials-welding@googlegroups.com
Subject: [MW:11202] Welding consumable for CD3Mn
Dear experts
Can some body suggest suitable welding consumable for welding casting grade CD3Mn , UNS J92205 in SMAW process.
Thanks
Regards
Fredric prabu
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