[MW:13510] Re: 13415] Filler welding for A351 Gr CD4 M Cu

Sir Goswami,

Hello !

Tanks a lot for your last message and I want to add some details on
the subject.

It is a condensate pump which data is:

1) The pressure discharge is 240 bara,

2) The temperature is between 130°C and 140°C,

3) Pump type is multicelulare with 12 stages,

4) Piping materials is A351 CD4MCu; this seems strange to me, because
a pump barred which operates in those conditions is made of stainless
steel.

Thanks in advance,

Regards,
BENADJAL Redouane
Project engineer (SONATRACH Algeria)

On 6 jan, 00:54, "pgoswami" <pgosw...@quickclic.net> wrote:
>  Hello Benadjal,
>
>  A351Cd4MCu.pdf
> 129KAfficherTélécharger
>
>  Stainless Q & A 2004-09-012-CD4MCu pump.pdf
> 54KAfficherTélécharger
>
> Cd4MCu is a cast duplex stainless steel with not so good weldability. Advice
> would be to use matching filler wire /electrode. Recommendation is to
> solution anneal the weld after welding, if the weld thickness is large,
> typically over 1/2", or else weld with very good control over heat input and
> interpass temperature.
>
> Generally this grade of Duplex S.S ( which is added with Copper) is
> preferred for corrosion resistance in acid media. What's the media in your
> case?? . If the service media is such that choice of Cd4MCu is a must then
> 308/308L filler metal would not match the corrosion requirements.
>
> See the attached articles which explains the pros and cons on welding of
> this alloy. The second one Q&A  is an extract from AWS-Welding Journal, and
> explains this alloy in details.
>
> I hope this would be of help to you.
>
> Thanks.
>
> Pradip Goswami,P.Eng.IWE
> Welding & Metallurgical Specialist & Consultant
> Ontario,Canada.
> Email-pgosw...@sympatico.ca,
> pgosw...@quickclic.net
>
>
>
> -----Original Message-----
> From: materials-welding@googlegroups.com
>
> [mailto:materials-welding@googlegroups.com] On Behalf Of
> rbenad...@avl.sonatrach.dz
> Sent: Thursday, January 05, 2012 4:46 AM
> To: Materials & Welding
> Subject: [MW:13415] Filler welding for A351 Gr CD4 M Cu
>
> Good morning,
>
> I chose type E308 & E 308 L filler welding for A351 Gr CD4 M Cu material,
> the choice was made, as per ASME Section II Part C code,
>
> Question:  Is it a good choice?
>
> Thanks.
>
> Best regards.
> BENADJAL Redouane
> Project engineer (SONATRACH Algeria)
> E-mail: refazosa...@gmail.com
>
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