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Re: [MW:6612] MW:6593- Re: value of ferrite content

By Materials & Welding
Hi
 
Thanks for your valuable message.
 
But my client specification give acceptance range  for duplex weld acceptance is 3 to 10 FN only.
 
Louis

From: GOSWAMI Pradip -THERMAL <pradip.goswami@opg.com>
To: materials-welding@googlegroups.com
Cc: alouis1972@yahoo.co.in
Sent: Fri, 20 August, 2010 2:30:43 AM
Subject: [MW:6602] MW:6593- Re: value of ferrite content

Hi Louis,

 

Please find the following documents for your reference. The first one (extracted from Metals Handbook) is the WRC-1992 diagram for predicting ferrite in stainless steel weld metal. For duplex stainless steel the concept is based on extended ferrite no, shown in the diagram.

 

The second paper from Avesta, shows the formula for conversion of  % Ferrite to FN.

 

·         Volume Percent Ferrite = 0.55 EFN + 10.6

 

This formula looks to be accurate as  Ferrite 65% by volume fraction turns out to 100 FN approx.

 

You may use this formula to convert form Volume % ferrite to FN, as asked below.

 

Thanks.

 

Pradip Goswami,P.Eng.

Welding & Metallurgical Engineer/Specialist

Ontario Power Generation Inc.

Email-pgoswami@sympatico.ca,

pgoswami@quickclic.net

 

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of A D
Sent: Thursday, August 19, 2010 9:48 AM
To: materials-welding@googlegroups.com
Subject: Re: [MW:6593] Re: value of ferrite content

 

Dear all,

 

               Can anybody give reference details what is ferrite no range will get if duplex weld ferrite content is 30-60%.

 

Louis

QC Engineer

Singapore

 

From: Yoon <ych93@hotmail.com>
To: Materials & Welding <materials-welding@googlegroups.com>
Sent: Tue, 17 August, 2010 1:23:33 PM
Subject: [MW:6536] Re: value of ferrite content

above value mentioned by Mr Bathula is for weld metal, not base material.

Regards

On Aug 17, 2:02 pm, "Bathula Raghuram (Mumbai - PIPING)"
<R.Bath...@ticb.com> wrote:
> For Duplex SS it would be 30-60% and austenitic SS 3-10% (except 310)
>
>
>
> -----Original Message-----
> From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Yoon
> Sent: Tuesday, August 17, 2010 10:16 AM
> To: Materials & Welding
> Subject: [MW:6533] Re: value of ferrite content
>
> The chemical analysis of S31803 is designed to obtain 50% ferrite contents.
> The range of ferrite content depends on actual chemical contents.
>
> I think carbon content for C.S or S.S is not important. Anyway ferritic carbon steel : approxi. 100%, austenitic stainless steel:
> approxi. 0%.
>
> Regards,
>
> On Aug 17, 10:38 am, skrie85 <skri...@yahoo.com> wrote:
> > What the range value/percentage for ferrite content of duplex (SA240
> > UNS 31803) , Stainless steel and Carbon steel?
>
> Filtered by Hosted Filtering- Hide quoted text -
>
> - Show quoted text -

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THIS MESSAGE IS ONLY INTENDED FOR THE USE OF THE INTENDED RECIPIENT(S) AND MAY CONTAIN INFORMATION THAT IS PRIVILEGED, PROPRIETARY AND/OR CONFIDENTIAL. If you are not the intended recipient, you are hereby notified that any review, retransmission, dissemination, distribution, copying, conversion to hard copy or other use of this communication is strictly prohibited. If you are not the intended recipient and have received this message in error, please notify me by return e-mail and delete this message from your system. Ontario Power Generation Inc.

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