[MW:2749] RE: 2748] Weld Crack at Root trough weld metal

E 8010/E8018 is too brittle joints after welding, those are good if you want to obtain hard/brittle  surface on weld. 7010/7018 will be good for those material

 

 

From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of Antonio Ruscitto
Sent: Tuesday, July 21, 2009 9:29 AM
To: Materials & Welding
Subject: [MW:2748] Weld Crack at Root trough weld metal

 

Sorry IŽm forget to ask you whatŽs the thicknes of pipe?

Antonio Ruscitto

>>> "Antonio  Ruscitto" <ARUSCITT@metrogas.com.ar> 21/07/2009 11:37:31 am >>>

The WPS was qualificated? was it OK? WhatŽs kind messure value was took (Brinnel, Vickers)?
I make a WPS with first pass with E7010 and the hot pass with E8018 (Up), but maybe it better make with 100°C of preheat, and the time between first and second pass it more shorter possible after clen the fisrt pass.

Antonio Ruscitto

>>> shiva <luvshiv2002@gmail.com> 21/07/2009 10:33:36 am >>>

We are using API 5L X65 grade material for sour environment. With
reference to our WPS we used (Ador electrodes) e 8010 for root and
8018 for hot fill pass.
We took NDT and its okay. But after 1 month 4 weld joints crack. We
checked the macro hardness for existing and cracked joint . There was
a high hardness eg 351, 329 on root and in weld metal cap side 280
above. Which is very high.

Can you please tell me for this material what type of electrodes to be
used? And why this occoured ?? And what may be possible reason for
this occourance?

Regards,
Y.C.Shiva,
QA/QC Engineer,
+974 6166465
Doha Qatar.

*********************************************************************

¡IMPORTANTE!

Para evitar accidentes por inhalación de monóxido de carbono:

- Mantenga los ambientes ventilados en forma permanente.

- Revise que la llama sea color azul y uniforme.

- Instale y haga revisar periódicamente sus artefactos sólo a través de gasistas matriculados.

Recuerde que los artefactos a gas pueden emitir Monóxido de Carbono: un gas altamente tóxico e imperceptible.

Más consejos en http://www.metrogas.com.ar

*********************************************************************

Este mensaje es privado y confidencial y va dirigido sólo al destinatario indicado. Si lo ha recibido por error, por favor avísenos inmediatamente vía e-mail a error-mail@metrogas.com.ar y tenga la amabilidad de eliminarlo de su sistema. La utilización o divulgación de su contenido puede importar la comisión de un delito. No copie, reproduzca o divulgue -en forma parcial o total- su contenido. Cualquier opinión contenida, es exclusiva de su autor y no representa la opinión de MetroGAS S.A. - Muchas gracias.

This message is private and confidential and it is only intended for the addressee named above. If you have received this message and it is not addressed to you, please advise us immediately at error-mail@metrogas.com.ar and kindly remove it from your system. The use or disclosure of its contents may be regarded as an offense. Do not copy, reproduce or disclose them, either partially or fully. Opinions are the exclusive responsibility of the author and do not represent the opinion of MetroGAS S.A. - Thank you.

:: http://www.metrogas.com.ar

 

<BR

--~--~---------~--~----~------------~-------~--~----~
To post to this group, send email to materials-welding@googlegroups.com
To unsubscribe from this group, send email to materials-welding-unsubscribe@googlegroups.com
For more options, visit this group's bolg at http://materials-welding.blogspot.com/
The views expressed/exchnaged in this group are members personel views and meant for educational purposes only, Users must take their own decisions w.r.t. applicable code/standard/contract documents.
-~----------~----~----~----~------~----~------~--~---