We have a different understanding for the generally, the oil & gas industry, the percent ferrite should be between 35 - 60% and the FN from 4 - 8
We would assume you are using Ferritscope MP 30 for the measurement
David Chan
~~~~~~~~~~~~~~~~~~~~~~~~~~
-----Original Message-----
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Sukamal Naskar
Sent: Friday, February 26, 2010 1:22 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:4376] ferrite number of duplex stainless steel weld
Optimum is 50FN, but 40 ~ 70 FN will be acceptable , but still it
depends on the client's technical specifications.
Regards,
On 2/26/10, pankaj.johri@in.transport.bombardier.com
<pankaj.johri@in.transport.bombardier.com> wrote:
> Hi,
>
> We are welding duplex stainless steel.
>
> To control the parameters of welding, we are measuring ferrite number of
> weld.
>
> Can anybody tell us how acceptable values of ferrite numbers are decided.
>
>
> Regards,
>
> Pankaj
>
>
> Please consider the environment before you print / Merci de penser à
> l'environnement avant d'imprimer
>
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