F = Flux 7 = 70,000 psi minimum tensile strength A = As welded 6 = At least 20 ft-lbs at -60 when using EM12K E = Electrode M = Medium Mn content 12 = .12% nominal carbon content K = Optional to denote silicon killed (deoxidized) Saw Filler Metal Example F7A6 - EM12K - “Killed” Rimmed steel - Cheapest, most impurities Semi-killed - Better Killed - Best, cleanes, highest cost
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