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SFA-5.1/SFA-5.1M

2007 SECTION II, PART C

TABLE A3 TYPICAL STORAGE AND DRYING CONDITIONS FOR COVERED ARC WELDING ELECTRODES
AWS Classification A5.1
E6010, E6011 E6012, E6013, E6019, E6020, E6022, E6027, E7014, E7024, E7027

Storage Conditions(1,2) A5.1M Ambient Air
Ambient temperature 80°F ± 20°F [30°C ± 10°C] 50% max. relative humidity Not recommended

Holding Ovens
Not recommended 20°F to 40°F [10°C to 20°C] above ambient temperature 50°F to 250°F [30°C to 140°C] above ambient temperature

Drying Conditions(3)
Not recommended 275°F ± 25°F [135°C ± 15°C] 1 hr at temperature 500°F to 800°F [260°C to 425°C] 1-2 hr at temperature

E4310, E4311 E4312, E4313, E4319 E4320, E4322, E4327, E4914, E4924, E4927

E6018, E7015, E7016, E7018, E7028, E7018M, E7048

E4318, E4915, E4916, E4918, E4928, E4918M, E4948

NOTES: (1) After removal from manufacturer’s packaging. (2) Some of these electrode classifications may be designated as meeting low moisture absorbing requirements. This designation does not imply that storage in ambient air is recommended. (3) Because of inherent differences in covering composition, the manufacturers should be consulted for the exact drying conditions.

and low-hydrogen electrodes, as well as to recognize the industry demand for electrodes with 70 ksi [490 MPa] minimum tensile strength. Unlike the E70XX-X [E49XX-X] classification in AWS A5.5, Specification for Low-Alloy Steel Electrodes for Shielded Metal Arc Welding, these electrodes do not contain deliberate alloy additions, nor are they required to meet minimum tensile properties after postweld heat treatment. A6.13.4 E70XX [E49XX] low-hydrogen electrodes have mineral coverings which are high in limestone and other ingredients that are low in moisture and hence produce weld deposits “low in hydrogen content.” Low-hydrogen electrodes were developed for welding low-alloy high-strength steels, some of which were high in carbon content. Electrodes with other than low-hydrogen coverings may produce “hydrogen-induced cracking” in those steels. These underbead cracks occur in the base metal, usually just below the weld bead. Weld metal cracks may also occur. Low-hydrogen electrodes should be used when welding high-sulfur or enameling steels. Other electrodes are likely to cause porosity and/or cracks in high-sulfur steels. With enameling steels, the hydrogen that escapes after welding with other than low-hydrogen electrodes produces holes in the enamel. A6.14 Amperage Ranges. Table A4 gives amperage ranges which are satisfactory for most classifications. When welding vertically upward, currents near the lower limit of the range are generally used.
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A7. Description and Intended Use of Electrodes A7.1 E6010 [E4310] Classification A7.1.1 E6010 [E4310] 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, usually exceeding 30% by weight. The other materials generally used in the covering include titanium dioxide, metallic deoxidizers such as ferromanganese, various types of magnesium or aluminum silicates, and liquid sodium silicate as a binder. Because of their covering composition, these electrodes are generally described as the high-cellulose sodium type. A7.1.2 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 pipe and generally are capable of welding in the vertical position with either uphill or downhill progression. A7.1.3 The majority of applications for these electrodes is in joining carbon steel. However, they have been used to advantage on galvanized steel 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 3⁄16 in.

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