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RE: [MW:21914] Filler wire for C12A with WC9

By Materials & Welding
Hi,Vadivel Mahadevan,
 
The selection of welding consumable may correspond either to Grade 91 steel or Grade 22 steel (depending on the application, component being welded).DMW's involving Grade91 steel are always tricky as chances of failures are always there.
 
Many welding engineers  prefer stronger welds for DMW's involved in supercritical power plants.The rationale " failure of welds" are more common than BMs". Hence  grade 91  consumable is often recommended say for High Temperature Piping, Super heater tubes where DMW's are involved between grade-91 and grade 22 steel.
 
Consumables matching grade 22 steel are generally recommended with good degree of conservatism (as described in the attachment). However chances failures is service for  grade 22 welds are always there if the design temperature is  above 500 Deg C.
 
If required alteration of welding technique(e.g buttering grade-91 with grade 22 electrode+PWHT ) followed by full welding +another PWHT would be better recommendation.
 
Please see this attachment for general guidance.
 
Thanks
 
Pradip Goswami, P.Eng,IWE
Welding & Metallurgical Specialist
Ontario, Canada
pgoswami@quickclic.net
pradip.goswami@gmail.com
http://ca.linkedin.com/pub/pradip-goswami/5/985/299
 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of george.dilintas@gr.bureauveritas.com
Sent: Thursday, September 11, 2014 10:39 AM
To: materials-welding
Subject: Re: [MW:21875] Filler wire for C12A with WC9

Do not forget that section VIII-1 requires PWHT for Pno 15E
Best regards
Dr Georgios Dilintas
Authorized Nuclear Inspector
Authorized Inspector Supervisor
HBS Regional Technical Manager

  From: "rajesh s. mhaske ,Engineer Welding ,PUNE,INDIA" [rajesh.mhaske17@gmail.com]
  Sent: 09/11/2014 05:55 AM MST
  To: materials-welding@googlegroups.com
  Subject: Re: [MW:21873] Filler wire for C12A with WC9


Dear sir
         YES, Weld of  ER90S-B3+E9018-B3  temperature around 720-730°C (1330-1345°F), for 2 hours,  this temp is
sufficient to temper the P91 HAZ without over-tempering the P22,


On Thursday, September 11, 2014 12:36:02 PM UTC+5:30, Vadivel Mahadevan wrote:
Thanks Mr. Rajesh,
I have gone through the chemical composition of ER90S-B3, but it is likely to match 2 1/2 Cr. alloy steels. Will it be compatible for 9 Cr. steel?
Regards
Vadivel. M

On Wednesday, September 10, 2014 7:06:44 PM UTC+5:30, rajesh s. mhaske ,Engineer Welding ,PUNE,INDIA wrote:
Dear sir
   use GTAW : ER90S-B3 , PWHT  720-730 , 2 hrs or
   GTAW +SMAW : ER90S-B3+E9018-B3 , PWHT  720-730 , 2 hrs or
   GTAW +FCAW : ER90S-B3+E91T1-B3  , PWHT  720-730 , 2 hrs
   

On Wednesday, September 10, 2014 12:08:16 PM UTC+5:30, Vadivel Mahadevan wrote:
Sir,
I will take up your suggestion. I have GTAW also.
It is a fillet joint and it varies from 8mm to 20mm.
ASME Sec.IX is the code I need to refer.
Regards
Vadivel. M

On Wednesday, September 10, 2014 11:52:18 AM UTC+5:30, George Dilintas wrote:

I would not recommend MIG for low alloy steels (P22 is also low alloy)
Would be better combination of GTAW and SMAW.
What is your thickness?
What is your construction Code / Standard?

    best regards

    Dr. Georgios Dilintas

    Authorized Nuclear Inspector
    Authorized Inspector Supervisor


    I&F REGIONAL TECHNICAL MANAGER
    BUREAU VERITAS HELLAS

    Tel: +30 210 40 63 113/4
    Fax: +30 210 40 63 118
    Cell: +30 69 44 64 62 04
    (See attached file: Dilintas_George.vcf)

Inactive hide details for Vadivel Mahadevan ---10/09/2014 06:48:12---Dear Experts,Vadivel Mahadevan ---10/09/2014 06:48:12---Dear Experts,

From: Vadivel Mahadevan <vadivel...@gmail.com>
To: material...@googlegroups.com
Date: 10/09/2014 06:48
Subject: [MW:21834] Filler wire for C12A with WC9
Sent by: material...@googlegroups.com



Dear Experts,
 

I need to weld P15E(C12A/P91 - High alloy steel) material with P5A(WC9/P22 - Low alloy steel).

Can you please guide me on MIG Filler wire that needs to used for this combination.

 

Thanks and regards

Vadivel. M

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