Lincoln Electric C2.410 manual End view Side view

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Fillet and Lap Welds – The ideal fillet or lap weld has equal legs and a flat or slightly convex bead. Excess convexity wastes weld metal. A concave bead is susceptible to shrinkage cracks.

Flat fillet and lap welds are made with the same general techniques as groove welds.

	45°	60°
	45°
End view		Side view

Weld single pass fillets using a drag technique with the tip of the electrode touching both plates. Usually weld with the electrode at a 45° angle (end view) from the horizontal plate. However, adjust this angle from as little as 30° to as much as 60° when required to maintain equal leg sizes on both plates.

When two passes are needed, deposit the first bead mostly on the bottom plate. To weld the second pass hold the electrode at about 45° angle fusing into the vertical plate and the first bead.

		4
	2		3
	2	1	2
		1
		1
		1

Make multiple pass horizontal fillets as shown in the sketch. Put the first bead in the corner with fairly high current even though there may be slight undercut, succeeding passes will burn it out. Deposit the second bead on the horizontal plate fusing into the first bead. Hold the electrode angle needed to deposit the filter beads as shown, putting the final bead against the vertical plate.

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Contents Stick Electrode Welding Guide Page Table of Contents Welding Procedures Out-Of-Position Welding Vertical and OverheadVertical Up Techniques for Fillet and Groove Welds Vertical Up Groove Welds Vertical Down Welds160 Polarity Vertical Up Fillet WeldsWeld High-Deposition Welding Jetweld LH-3800 E7028H8Wrong End view Side view Corner Welds Groove Welds First Pass Groove WeldsJetweld 2 E6027 Amps. AC at 14/Min Deep Groove Welds Joint a Pass E6011T Over E6011 Root PassesFt. of Weld/Hr Lbs. of Elec./Ft. 049 Flat Fillet WeldsPlate Size T 14 ga 12 ga 10 ga No. of Passes Leg Size L 082 117 162 WeldHorizontal Fillet Welds Welding Inclined Plate Polarity Arc Speed In./Min.3 Lbs. of Elec./Ft. Downhill Angle deg180 High Speed Welding Sheet Metal AlternatePage Edge Welds Fillet Welds Lap WeldsCurrent Amps 120 170 Polarity Diameter PositionCurrent Amps 110 155 Polarity 018 028Burnthrough Spot Welds Roof Decking to Beam Roof Beam Flange Roof Deck Thickness 22 ga 20 ga 18 ga 16 gaLow Hydrogen Welding E7018-1Multipass Page Overhead Groove Welds Diameter Current Amps 155 PolarityArc Speed In./Min Ft. of Weld/Hr Lbs. of Elec./Ft. Overhead Fillet Welds Also see Out-of Position Procedures,No. of Pass Leg Size L No. of Passes Leg Size LDiameter Current Amps 230 200 Polarity Horizontal Groove WeldsBack gouge first bead as needed Plate Size T No. of Passes Arc Speed In./Min Ft. of Weld/Hr Lbs. of Elec./Ft. of WeldUse steel backing as on 230 200 PolarityWith E7028 Electrode 275 350 With E7018 Electrode132 195 272 409 727 260 335 157 236 320203 335 Ft. of Weld/Hr.2 Lbs. of Elec./Ft.785 Minimum Preheat and Interpass Temperature1 Stick Electrode Typical Operating Procedures Out-of-Position GroupHigh Deposition Group High Speed GroupLow Hydrogen Group Low Hydrogen, Low Alloy Steel GroupFleetweld Fleetweld 35LS Jetweld Shield-Arc 70+ Fleetweld JetweldFleetweld 5P Shield-Arc Fleetweld 5P+ Shield-Arc HYP+Electric Shock can kill Fumes and Gases can be dangerous For Electrically powered Electric and Magnetic Fields Stick C2.410 12/04