Thursday, September 23, 2010

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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