Re: [MW:14682] RE: 14588] FERRITE PERCENTAGE

Dear Chiranjeevulu

Stabilization annealing in the range of 500-900 Deg C will lead to
sensitization and embrittlement due to the sigma phase formation.
Sigma phase formation will depend on the ferrite %, where more than 8%
ferrite will result in sigma phases which is continuous in nature. So
in ASS the ferrite % is limited to 3-8%.

Thanks and Regards
Harikrishnan N S

On Sun, Jun 24, 2012 at 5:43 PM, pgoswami <pgoswami@quickclic.net> wrote:
>
>
>
> Pradip Goswami,P.Eng.IWE
> Welding & Metallurgical Specialist
> Ontario, Canada.
> Email-pgoswami@sympatico.ca,
> pgoswami@quickclic.net
>
> -----Original Message-----
> From: materials-welding@googlegroups.com
> [mailto:materials-welding@googlegroups.com] On Behalf Of Temburu
> Chiranjeevulu
> Sent: Tuesday, June 19, 2012 3:11 AM
> To: Materials & Welding
> Subject: [MW:14588] FERRITE PERCENTAGE
>
> Dear Expert,
>
>
>                   If A312TP321 material will get ferrite % more than
> required,what will happend during stabilization heat treatment, and why we
> have to check ferrite% before stabilization heat treatment.
>
>
>
> Regards,
> T.CHIRANJEEVULU.
> ENGINEERS INDIA LTD
> ENGINEER-WELDING/NDT
> OPAL PROJECT,DAHEJ.
>
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