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Hi, Ken, Seems like you got good information, and lots of it. Here are a couple of points I didn't see anyone else mention. 7018 is coated with extra iron powder in the flux. It is a low hydrogen rod that needs to be left sealed until you are ready to use it, then kept in a heated container. If it picks up moisture from the air, the porosity of the weld will more than undo the benefit of the extra 10,000 psi tensile strength. 7018 is a poor performer on AC, and 7018AC is just kind of a poor performer. 7014 is coated with iron powder titania. It is an all position, high deposition, 70,000 psi electrode that runs well on AC and doesn't require special handling (stores okay at room temp.) Both 7018 and 7014 are mild penetrating rods, whereas 6010 and 6011 are deep penetrating. Keep in mind that you only get the benefit of the extra 10,000 psi for what's welded. You don't even have to do the math to figure out that 100% penetration with 6010 is going to be a stronger weld than 50% pentration with 7014 or 7018. Don't hesitate to correct me if I'm wrong here, T_Bone. I don't have a lifetime of real world experience behind me like you do. What I have is an inquiring mind, and the opportunity to run hours and hours of destructive testing under reasonably controlled conditions. Nothing I've been able to devise has worked out much different from just about what it was supposed to. All the best, Stan
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