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Root pass on 7018 certification
Posted: Tue Apr 07, 2020 7:11 pm
by Wildwelder96
For those of you that have taken the 7018 certification test what diameter electrode did you guys use for the root? I've had trouble doing a root with a 1/8. I can easily do a root with a 3/32 though.
Re: Root pass on 7018 certification
Posted: Sun Apr 12, 2020 2:25 pm
by bap_
What position/thickness/bevel angle/gap are you using. The AWS D1.1 allows for quite a bit of movement.
I have used 1/8 in all positions and 3/32 was allowed in the 3G. I gaped the plates a somewhere between 3/8 and 1/4 inch so 1/8 is a bit easier to fill the root. I think 3/32 is a bit safer in terms of making sure you burn into the corners.