CHARACTERISTICS & APPLICATIONS
ífíl-61 electrodes are characterized by a deeply penetrating, forceful, spray type arc and readily removable, thin, friable slag which may not seem to completely cover the weld bead. Fillet welds usually have a relatively flat weld face and have a rather coarse, unevenly spaced ripple. The coverings are high in cellulose. Because of their covering composition, these electrodes are generally described as the high-cellulose potassium type.
These electrodes are recommended for all welding positions, particularly on multiple pass applications in the vertical and overhead welding positions and where welds of good soundness are required. They frequently are selected for joining pipes and generally are capable of welding in the vertical position with either uphill or downhill progression.
The majority of applications for these electrodes are in joining carbon steel. However, they have been used to
advantage on galvanized steels and on some low-alloy steels. Typical applications include shipbuilding, buildings, bridges, storage tanks, piping, and pressure vessel fittings. Since the applications are so widespread, a discussion of each is impractical. Sizes larger than 5.0 mm generally have limited use in other than flat or horizontal-fillet welding positions.
These electrodes are designed to be used with ac current and to duplicate the usability characteristics and mechanical properties of ífíl-60. Although also usable with dcep (electrode positive), a decrease in joint penetration will be noted when compared to ífíl-
60. Arc action, slag, and fillet weld appearance are like those of the ífíl-60. The maximum amperage that can generally be used with the larger sizes of these electrodes is limited in comparison to that for other classifications due to the high spatter loss that occurs with high amperage.
Storage and Drying Conditions: Ambient temperature.
CHEMICAL COMPOSITION OF WELD METAL
| C | Mn | Si | P | S | Ni | Cr | Mo | V | Mn+Ni+Cr+Ni+V |
| 0.20 | 1.20 | 1.00 | NS | NS | 0.30 | 0.20 | 0.30 | 0.08 | NS |
Single values are maxima, except where specified otherwise.
ALL-WELD-METAL MECHANICAL PROPERTIES
| Tensile Strength, MPa | Yield Strength, At 0.2% Offset, MPa | Elongation, % |
Charpy V-Notch Impact at -30°C, Joules |
| 430 | 330 | 22 | 27 |
Single values are minimal.
ELECTRODE SIZE & WELDING CURRENT
| Diameter, mm | Length, mm | AC or DCEP, Amperes |
| 2.50 | 350 | 40-80 |
| 3.15, 3.20 | 450 | 75-125 |
| 4.00 | 450 | 110-170 |
| 5.00 | 450 | 140-215 |
WARNING: Safety and health information is available from many sources, including, but not limited to Safety and Health Fact Sheets listed in A11.3, ANSI Z49.1 Safety in Welding, Cutting, and Allied Processes published by the American Welding Society, 8669 Doral Blvd., Suite 130, Doral, FL 33166., and applicable federal and state regulations. The Safety and Health Fact Sheets are revised, and additional sheets added periodically.