[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
>
> --
> To post to this group, send email to materials-welding@googlegroups.com
> To unsubscribe from this group, send email to
> materials-welding+unsubscribe@googlegroups.com
> For more options, visit this group's bolg athttp://materials-welding.blogspot.com/
> The views expressed/exchnaged in this group are members personel views and
> meant for educational purposes only, Users must take their own decisions
> w.r.t. applicable code/standard/contract documents.- Masquer le texte des messages précédents -
>
> - Afficher le texte des messages précédents -

--
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding+unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.

Heat tint (temper) colours on stainless steel surfaces heated in air // Heat tint

Introduction The colour formed when stainless steel is heated, either in a furnace application or in the heat affected zone of welds, is dependent on several factors that are related to the oxidation resistance of the steel. The heat tint or temper colour formed is caused by the progressive thickening of the surface oxide layer and so, as temperature is increased, the colours change. Oxidation resistance of stainless steels However, there are several factors that affect the degree of colour change and so there is no a single table of colour and temperature that represents all cases. The colours formed can only be used as an indication of the temperature to which the steel has been heated. Factors affecting the heat tint colours formed Steel composition The chromium content is the most important single factor affecting oxidation resistance. The higher the chromium, the more heat resistant the steel and so the development of the heat tint colou...

Materails FAQs

Q: What are equivalents for standard Q 235 B (and Q 235 A) for U-channels? (asked by: boris.vielhaber@vait.com) A: DIN Nr. = 2393 T.2, 2394 T.2, EN 10025 W. Nr. DIN 17007 = 1.0038 Design DIN 17006 = RSt 37-2, S235JRG2 (Fe 360 B) Q: What is St DIN 2391 BK material? (asked by: dmcandrews@automaticstamp.com) A: Precision steel tubes, cold-finished/hard. Q: What is C.D.W. Boiler Tube? (asked by: montydude123@yahoo.com) A: Cold Drawn Welded Boiler Tube. Q: WHAT IS W.Nr. 1.4301? PLS TELL US IN EASY LANGUAGUE (asked...

The Schaeffler and Delong diagrams for predicting ferrite levels in austenitic stainless steel welds

Introduction Ferrite is important in avoiding hot cracking in during cooling from welding of austenitic stainless steels. 'Constitution diagrams' are used to predict ferrite levels from the composition by comparing the effects of austenite and ferrite stabilising elements. The Schaeffler and Delong diagrams are the original methods of predicting the phase balances in austenitic stainless steel welds. Nickel and chromium equivalents A 'nickel equivalent' is calculated for the austenite stabilising elements and a 'chromium equivalent' ferrite stabilising elements. These are used as the axes for the diagrams, which show the compositional equivalent areas where the phases austenite, ferrite, martensite (and mixtures of these) should be present. Although intended to show the phase balance of weld fillers, these diagrams can also be used to illustrate the phase balance of the 'parent' material. There are different diagrams for dif...

Materials & Welding

Search This Blog