Thursday, September 23, 2010

[MW:7176] Re: 7151] Re: Delta ferrite Drg

Hello Mr.. Hedge and Mr. Karthik

Thanks for sharing this information. I know the diagram as Scheaffler
- DeLong Diagram but didn't make a relation to it when some asked for
Delta Ferrite Drawing.
As mentioned before in the past during my work at a metallurgical
laboratory we often have to report a picture of delta ferrite skeleton
present in weld metal which in my opinion fits more to the description
"Delta Ferrite Drawing". In some specifications clients and/or
Engineers describe a requirement for Ferrtie Number as additional
variable for PQR which in my opinion is more clear as the term "Delta
Ferrite Drawing".
Problem with clients and / or Engineers is that "a fool can ask for
more that ten wise guys can answer", perhaps this applies to this
request as well.

Best regards,

Herman Pieper

On 23 sep, 11:58, "s. karthik" <karthik14...@gmail.com> wrote:
> 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...@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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> > meant for educational purposes only, Users must take their own decisions
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>
>
>
>  DIAGRAM PREDICTING FERRITE.bmp
> 938KWeergevenDownloaden

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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.

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