[MW:19885] RE: 19876] Re: Welding UNS S31254 to UNS S31254

Hi Prabhu,

625 Filler contains fairly high percentage of "Nb"(please see below)

The presence of Nb causes problems that may place restrictions on the weld procedures. Nitrogen can diffuse rapidly from the 6%Mo HAZ to the weld metal and result in the formation of niobium nitrides at the weld deposit & fusion boundary, leading to some loss of ductility and corrosion resistance.

If the failures are in side bends test, then Nb  in weld metal  should be restricted to minimum or Nil content.

It would be good to know what's the real problem.

Thanks

 

Pradip Goswami, P.Eng,IWE

Welding & Metallurgical Specialist

Ontario, Canada

pgoswami@quickclic.net

pgoswami@sympatico.ca

 

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From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of prabhu
Sent: Thursday, January 16, 2014 10:56 PM
To: materials-welding@googlegroups.com
Subject: [MW:19876] Re: Welding UNS S31254 to UNS S31254

Dear All,

ER NiCrMo-3 result are dood for lower thickness but for higher thickness i am getting problem. I am welding 10-16 mm thick plates please guide welding parameters for the same.

On Friday, November 15, 2013 3:28:52 PM UTC+5:30, prabhu wrote:

Dear All,

Can you guide me for selecting TIG filler wire for SMO 254  UNS S31254  to  UNS S31254 plate thickness 10mm

and in preparing WPS for same with parameters inputs.

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