ASTM A105N to ASTM A333 grade 6

Please help me select welding consumable for pWPS
Flange ASTM A105N to Pipe ASTM A333 grade 6.
Root by TIG
Fill and cap by SMAW
Thanks in advantage.

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For TIG used Er70S6 for SMAW used E7018-1

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Thank you!

As i know er70s-6 is welding wire that used for gmaw process??

This should be mentioned specification
AWS/ASME A/SFA 5.18 ER70S-6
AWS/ASME A/SFA 5.1 E7018-1

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Why don’t use ER70S-2 ?