Obviously you have to use E9018-X classification according to your PSL .Many specification say the strength level should be matched .In case of pipeline we have see the Y.S also Refer DNV –OS-F101 specification
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of dinesh verma
Sent: 23 August 2010 20:49
To: materials-welding@googlegroups.com
Subject: Re: Re: [MW:6661] ELECTRDOE STRENGHT REQUIRMNET FOR PLATE GR65
pl clarify why E8018 MIN TENSILE 80,000 PSI ELECTODE IS BEING USED IN MANY OF THE LINE PIPE WELDING OF GRADE API 5L X 70 WHOSE MIN TENSILE IS 82,000 PSI
REGARDS
DINESH
On Mon, 23 Aug 2010 21:57:53 +0530 wrote
>Sujeeth,
In all PQR testing as per ASME SEC-IX requires Tensile strength only .How can you calculate based on Yield strength.
vaithiyanathan
On 8/22/10, Sujeet Sangle wrote:
We should select the consumable with the YS and no TS properties .
Regards,
Sujeet
From: materials-welding@googlegroups.com [mailto:materials-welding@googlegroups.com] On Behalf Of B.Vaithiyanathan
Sent: Sunday, August 22, 2010 5:56 PM
To: materials-welding@googlegroups.com
Subject: Re: [MW:6625] ELECTRDOE STRENGHT REQUIRMNET FOR PLATE GR65
Always the welding electrode should meet Base material strength .By this way the electorde slection should be F7A0 .
Regards,
Vaithiyanathan,
On 8/22/10, Syed Moin wrote:
Dear Members,
Appreciate if you could provide me some information on the issue, During a PQR, manufacturer has used electrode F6A0-EM12 to weld plates A516 Gr. 65, welding procedure is SAW. Below is the comparison, between the tensile strength of the electrode,
comparison table
WELDING FLUX F6A0 PLATE flux certificate(see attachment) Strength of the plate material
REFER TO SFA 5.17 ASTM A516, GR65 test result Test Result
Tensile Tensile tensile tensile
60,000~80,000 psi 65000~85,000 psi 72289 psi (500MPa) 68875 psi (475 Mpa)
Our client says that the selected electrode is not suitable for Gr. 65c plates. Is it correct?
They say that the electrode shall be selected considering the minimum strength ( for this electrode minimum strength is 60, 000 PSI), and therefore it is not suitable for a plate with minimum strength value equal to 65000 PSI .
As you can see in the above table tensile test value for the electrode is 72289 PSI, but still the client is not ready to accept the use of this electrode.
Please advise.
Regardsa
MS
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