I'm not a welding engineer either:laughing: And I'm not saying a 7018 makes a bad weld,[as opposed to 6010],just saying that either would have beat the metal that hook was welded on,and 7018 is no magic rod,on the contrary,7018 rod has definite things going against it,and for the life of me,can't figure out why people say its the rod to weld fill and covers on with.
Probably cause many have never used a 6010 type rod to do things with other than root and hot,,7018 does put a smoother bead down,,but if you're used to using a 6010 type to put your covers on with[like a pipeline welder here in us anyways] you can put a beautiful cap on with it that you can be real proud of,[cause it ain't easy],a 6010 type rod lace on a horazontal comes to mind.
Pipefitters/boilermakers[power plant guys],...and pipeliners are in two different worlds,give an old pipeline guy a tig torch,he might try and light it.
Beating what your welding[meaning your weld not being the weak point,in whatever way] is the main thing,either rod would have beat it by far.As would the 6011.