Normal duplex and super duplex

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Pravin G

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Apr 14, 2015, 11:29:16 PM4/14/15
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Dear expert,

I'm having to weld normal duplex plate for vessel, SMAW process with following requirements:

I.v -40degC
FN: 35-65
CPT 22deg C @24 hrs
Corrosion 4g/mm

I'm unable to achieve FN even after several test.

Can anyone guide me how to achieve FN ?

Pravin
Singapore

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meisam shokri arfaei

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Apr 15, 2015, 3:19:09 AM4/15/15
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Which test did you implement for measuring the ferrite content?
Ferrite meter equipment or metallography?


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george....@gr.bureauveritas.com

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Apr 15, 2015, 3:22:28 AM4/15/15
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You are getting low or high ferrite?

best regards

Dr. Georgios Dilintas

Authorized Nuclear Inspector
Authorized Inspector Supervisor

I&F REGIONAL TECHNICAL MANAGER
BUREAU VERITAS PIRAEUS - GREECE

Tel: +30 210 40 63 113 /4 /5
Fax: +30 210 40 63 118
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Inactive hide details for Pravin G ---15/04/2015 06:29:23---Dear expert, I'm having to weld normal duplex plate for vessel, SMAPravin G ---15/04/2015 06:29:23---Dear expert, I'm having to weld normal duplex plate for vessel, SMAW process with following requirem

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Pravin G

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Apr 15, 2015, 10:18:07 AM4/15/15
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Dear Sir,

Our requirement for FN is 35-65, however we are getting exactly 35 which is border line for several test which is unacceptable by the client.

Kindly advice with your expertise.
Pravin Poornachandran


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On 15 Apr 2015, at 15:22, george....@gr.bureauveritas.com wrote:

You are getting low or high ferrite?

best regards

Dr. Georgios Dilintas

Authorized Nuclear Inspector
Authorized Inspector Supervisor

I&F REGIONAL TECHNICAL MANAGER
BUREAU VERITAS PIRAEUS - GREECE

Tel: +30 210 40 63 113 /4 /5
Fax: +30 210 40 63 118
Cell: +30 69 44 64 62 04


<graycol.gif>Pravin G ---15/04/2015 06:29:23---Dear expert, I'm having to weld normal duplex plate for vessel, SMAW process with following requirem

Pravin G

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Apr 15, 2015, 10:18:26 AM4/15/15
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Dear Sir,

We used ferrite meter equipment.

Pravin Poornachandran


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george....@gr.bureauveritas.com

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Apr 15, 2015, 4:40:05 PM4/15/15
to Pravin G
You weld needs to cool slower to give time for ferrite to develop. Could you send me the process parameters?

Sent from my BlackBerry 10 smartphone.
From: Pravin G
Sent: Τετάρτη, 15 Απριλίου 2015 - 17:18
Subject: Re: [MW:23104] Normal duplex and super duplex


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pgoswami

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Apr 16, 2015, 8:22:51 AM4/16/15
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Hello Pravin,
 
What's the  grade of DSS involved.What's the consumable used and what's the ferrite readings in consumable MTR? What's the thickness involved?
 
Meeting ferrite is only one part of DSS procedure qualification.
 
All those information would be worth looking at.
 
Thanks.
 
 
 
Pradip Goswami, P.Eng,IWE
Welding & Metallurgical Engineer/Specialist
Ontario, Canada
 

From: material...@googlegroups.com [mailto:material...@googlegroups.com] On Behalf Of Pravin G
Sent: Wednesday, April 15, 2015 10:04 AM
To: material...@googlegroups.com
Subject: Re: [MW:23105] Normal duplex and super duplex

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