Lincoln Electric C2.410 manual Multipass

Page 25

Drag the electrode lightly. Since low hydrogen electrodes rely on the molten slag for shielding, never hold a long arc, whip, leave the crater, or move rapidly in any direction. Failure to follow these techniques may result in porosity and/or reduce mechani- cal properties.

For Clean Tie-Ins – Strike the arc ahead of the crater, move quickly back into the crater, then proceed in the direction of welding. This technique welds over the striking area, eliminating porosity or tendency for poor starting bead shape.

Multiple Pass Welds – Clean the slag after each bead. When welding in the downhand position, use stringer beads or small weaves rather than wide weaves to avoid slag inclusions.

Vertical Techniques

Use 5/32” or smaller electrodes and currents in the lower portion of the electrode’s range. Techniques are as follows:

1.Use a triangular weave for heavy single pass welds. Heavy Single Pass

Triangular weave

Multipass

Stringer bead

Straight weave

-25-

Image 25

Contents Stick Electrode Welding Guide Page Table of Contents Out-Of-Position Welding Vertical and Overhead Welding ProceduresVertical Up Techniques for Fillet and Groove Welds Vertical Down Welds Vertical Up Groove Welds160 Polarity Vertical Up Fillet WeldsWeld Jetweld LH-3800 E7028H8 High-Deposition WeldingWrong End view Side view Corner Welds Groove Welds First Pass Groove WeldsJetweld 2 E6027 Amps. AC at 14/Min Over E6011 Root Passes Deep Groove Welds Joint a Pass E6011TPlate Size T 14 ga 12 ga 10 ga No. of Passes Leg Size L Flat Fillet WeldsFt. of Weld/Hr Lbs. of Elec./Ft. 049 082 117 162 WeldHorizontal Fillet Welds Welding Inclined Plate Polarity Arc Speed In./Min.3 Lbs. of Elec./Ft. Downhill Angle deg180 Alternate High Speed Welding Sheet MetalPage Edge Welds Lap Welds Fillet WeldsCurrent Amps 110 155 Polarity Diameter PositionCurrent Amps 120 170 Polarity 018 028Roof Deck Thickness 22 ga 20 ga 18 ga 16 ga Burnthrough Spot Welds Roof Decking to Beam Roof Beam FlangeE7018-1 Low Hydrogen WeldingMultipass Page Diameter Current Amps 155 Polarity Overhead Groove WeldsNo. of Pass Leg Size L Overhead Fillet Welds Also see Out-of Position Procedures,Arc Speed In./Min Ft. of Weld/Hr Lbs. of Elec./Ft. No. of Passes Leg Size LBack gouge first bead as needed Plate Size T No. of Passes Horizontal Groove WeldsDiameter Current Amps 230 200 Polarity Arc Speed In./Min Ft. of Weld/Hr Lbs. of Elec./Ft. of Weld230 200 Polarity Use steel backing as onWith E7028 Electrode 275 350 With E7018 Electrode132 195 272 409 727 157 236 320 260 335203 335 Ft. of Weld/Hr.2 Lbs. of Elec./Ft.785 Minimum Preheat and Interpass Temperature1 Out-of-Position Group Stick Electrode Typical Operating ProceduresHigh Speed Group High Deposition GroupLow Hydrogen, Low Alloy Steel Group Low Hydrogen GroupFleetweld 5P Shield-Arc Fleetweld 5P+ Fleetweld JetweldFleetweld Fleetweld 35LS Jetweld Shield-Arc 70+ 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