Friday, September 24, 2010

[MW:7175] MW:7170- Re: Delta ferrite Drg

Mr Hegde,

 

There’s nothing called delta ferrite drawing. There are phase diagrams showing the formation of delta ferrite and constitutional weld metal solidification diagrams for austenitic stainless steels, predicting ferrite in weld, e.g. shaffler, Delong diagram and WRC Ferrite No diagram..

 

The attached file is an extract from a literature of welding institute. I’ve attached some notes on this.

 

Feel free to read and you may discuss with your client also.

 

Thanks.

 

Pradip Goswami,P.Eng.

Welding & Metallurgical Engineer/Specialist.

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of s. karthik
Sent: Thursday, September 23, 2010 5:58 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:7170] RE: 7151] Re: Delta ferrite Drg

 

Hi,

Delta Ferrite Drawing is a diagram predicting Ferrite content in Stainless steels.You can measure the ferrite content by many of the method by NDE.If you are not having such facilities you can ask NDE company to measure the Ferrite Number and the will give you the result with Delta ferrite diagram(Chromium equivalent vs nickel equivalent).you can see the sample file attached with this.

Ferrite number is a measure of Chromium & Nickel equivalent in an Austenitic stainless steel material.Normally client wants to make sure the FN in Austenitic welds which has exceed or not.

 

Thanks & Regards,

(Karthik)

On Thu, Sep 23, 2010 at 10:50 AM, PB HEGDE <hegde.pb@isgec.com> wrote:

Dear Mr Herman Pieper
Client wants specifically "Delta Ferrite Drawing" Which I could not
understand
Regards

Hegde P.B.

-----Original Message-----
From: materials-welding@googlegroups.com
[mailto:materials-welding@googlegroups.com] On Behalf Of hpi001
Sent: Wednesday, September 22, 2010 9:23 PM
To: Materials & Welding
Subject: [MW:7151] Re: Delta ferrite Drg

Dear Mr. Hedge,

I assume that they mean the delta ferrite skeleton in weld connections
of Austenitic Stainless Steels. You need a minimum of 2 - 6 % Delta
Ferrite in order to avoid hot cracks. By way of the ferrite skeleton
in the weld metal you can show that this is present (continue skeleton
instead of a under broken skeleton). I hope you understand what I
meant because I don't now exactly how to put this in English.

Best Regards,


Herman Pieper

On 22 sep, 13:19, "PB HEGDE" <hegde...@isgec.com> wrote:
> Dear friends
>
> Request to share information about " Delta ferrite Drawing " which is
asked
> by one of our client i.e. what is the meaning of Delta Ferrite Drawing ?
>
> Regards
>
> Hegde P.B.

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