Re: [MW:16699] MAGNETIC CHECK

Dear David:

Tell your customer to check the characteristics of the SS-316.

For this alloy, it's normal to demonstrate magnetizing effects to some degree.
SS-316 "MUST" have some amount of ferrite (i.e. around 10%) other wise
it won't fit its purpose. There is Mo in this alloy, about 2% which
causes an austenite-ferrite structure with about 10% of ferrite in
austenite background.

In addition, durig welding all grains in weld and HAZ (including
ferrite grains) will be recrystalize almost in the same direction and
this is a good amplifier for the coherent magnetic fields of the alloy
which will resond to your customer's magnet.

Best Regards
Ramin Kondori
QC/Welding Engineer *
IWE AT 0070*


On 1/28/13, Chan, David <David.Chan@exterran.com> wrote:
> Hi Experts,
> We have an issue where the Customer is going around on the a stainless steel
> (S316L) using a potable to check on the materials and welds
>
> He has checked on some areas near the weldment where there is a force of
> attachment and the magnet is still sticking to the area
> The magnet drops off when the magnet is moving away from the weldment
>
> I request for a technical understanding to clarify with the customer
>
> Appreciate your kind assistance
>
> Thank you
> Best Regards
>
> David Chan
>
> Republic of Singapore
>
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*با تشكر*

* *

*رامين كندري*

واحد كنترل و تضمين كيفيت كارگاه ال ان جي كنگان

شركت نارديس انرژي

تلفن: 07727462189 داخلي 172 و171

فكس: 07727462179

همراه: 09132150320

آدرس: كنگان - سايت LNG - دفتر شركت نارديس

صندوق پستي 375 (اداره پست شهرستان كنگان)



*Regards*

*Ramin Kondori*

QA/QC Manager

IRAN-LNG Preoject

NARDIS ENERGY CO.

* *

*Tel.: +98-772-7462189 (Int.171, 172)*

*Fax: +98-772-7462179*

*Cell: +98-913-215-0320*

* Add.(Head office): No.27, 6th St., Seyed Jamalledin-e-Asad Abadi Ave.,
Tehran, Iran, 1431784891*
*Add.(Site): NARDIS Office, IRAN-LNG Plant, Kangan-Iran P.O.Box 375(Kangan
Post Office) *

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