[MW:1792] Re: Query on SMAW electrode selection for API 5L X65

Hi,

 

Using E6010-G would keep the dilution level as minimum, but at the same time, it wouldn;t give the UTS equal to Parent metal UTS for API5L X65?

Regards,

 

Ari

 

On 3/21/09, babu k <kbabupsg@gmail.com> wrote:

Hi,

 

Put it in simple words, the use of E6010-G is to keep the dilution level to be minimum ; 

 

Thanks & Regards,

 

K.Babu

Singapore

 

 

On Thu, Mar 19, 2009 at 6:15 PM, Ari <ariv2k@gmail.com> wrote:

Dear All,

Can you please advise, why E6010-G (root) & E-7010-P1 (hot/fill) are
used for Oil pipelines(Sour) containing parent material of API 5L X65.
Since these type of PQR/WPS are being approved by most of the
Company.

As, X65 has an YS of 65,000 Psi, whilst the electrodes used E6010 has
YS of  48,000 Psi, and E-7010-P1 has YS of 60,000 psi. By using both
of these electrodes the weld metal strength would not exceed  YS
60,000 psi.

How its acceptable to keep the low weld metal strength(<YS 60,000 Psi)
than the parent metal (= YS 65,000Psi).

Thy suppose to use E8010 for root and E8018 for hot/fill, for API 5L
X65 materials, which only would give the equivalent WM strength.

As we all know that overmatching weld metal strength causes gross
section yielding in the pipe, whereas Undermatching weld metal
strength will cause straining of the weld.

Your advise/suggession, based on experience is appreciated.

Regards,

Ari

--~--~---------~--~----~------------~-------~--~----~
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.
-~----------~----~----~----~------~----~------~--~---