You can use E 8010 for root and alternatively E 8018 / 9018 for balance passes.
E 9010 is good but, expensive.
Sridhar.
On Thursday, 9 August, 2018, 5:48:33 PM IST, 'Asif Shahzad' via Materials & Welding <materials-welding@googlegroups.com> wrote:
This message is eligible for Automatic Cleanup! (materials-welding@googlegroups.com) Add cleanup rule | More info Dear Expert,
we need to weld the API 5L X70 grade pipe and using the electrode 6010 for root, While tensile strength of the 6010 electrode is 430 MPa while tensile strength of X70 grade is (570 to 760)MPa. So tensile strength of 6010 is lower than x70.For hot pass, filling and capping we are using 9010.
Please provide your expert opinion that we can use the electrode having low tensile strength than the base metal and if yes kindly give the reason
Regards,
Asif
https://materials-welding.blogspot.com/
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