Re: [MW:6742] ELECTRDOE STRENGHT REQUIRMNET FOR PLATE GR65

Dear,

       When you are selecting the consumables its strength shall be more than the base materials strength . So select F7Ao flux, other wise some cases it will be come to strenght 60000-65000 range . if you required use same flux only option do some more coupons as per same parameters in PQR and go for mechanical testing & ensure its minimum tensile not going below 65000PSI.

 

 

Mohd Mubarish.P.M

Abudhabi.

 

On 22 August 2010 07:49, Syed Moin <Syed.Moin@gerabgroup.com> 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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