© COPYRIGHT 2000 THE ESAB GROUP, INC. LESSON III





Lesson 1
The Basics of Arc Welding
Lesson 2
Common Electric
Arc Welding Processes
Lesson 3
Covered Electrodes for Welding
Mild Steels
Lesson 4
Covered Electrodes for Welding Low Alloy Steels
Lesson 5
Welding Filler Metals for Stainless Steels
Lesson 6
Carbon & Low Alloy
Steel Filler Metals -
GMAW,GTAW,SAW
Lesson 7
Flux Cored Arc Electrodes Carbon Low Alloy Steels
Lesson 8
Hardsurfacing Electrodes
Lesson 9
Estimating & Comparing Weld Metal Costs
Lesson 10
Reliability of Welding Filler Metals
trodes.  The cost of electrical power is also a factor to a lesser degree.  By far, the largest factor is labor and overhead. g)   Welder Appeal- Welder appeal is definitely important, although this factor must not be allowed to subordinate other more significant criteria. 3.4.1 Typical Electrode Use by Welding Classification 3.4.1.1 The E6010 and E6011 classification electrodes would most likely be used for welding a mild steel joint in the vertical position with an open root.  If there are only AC power sources available, the choice between these two must be the E6011 type.  Many times arc blow is encountered when welding with direct current.  The use of E6011 electrodes on alter- nating current eliminates the arc blow. 3.4.1.2 The E6012  classification electrodes are largely used today in repair and welding of less critical structures.  Carbon steels with some rust present can be welded with this type of electrode.  It can be used to bridge or weld across wide gaps.  The use of this electrode, however, has diminished greatly in the past few years.  Before the advent of the low hydrogen electrodes and other welding processes, the E6012 electrode made up 60% of the total production of electrodes.  Today, it represents about 6% of the total production in the United States. 3.4.1.3 The E6013 classification of covered mild steel electrodes was originally designed to have low arc penetration and flat smooth weld beads.  These features allowed the electrode to weld sheet metal.  Today, many 6013 electrodes are used instead of 6012 electrodes because of the smoother arc, less spatter and more uniform weld bead surface. 3.4.1.4 The E7014 classification of covered mild steel electrodes, as indicated earlier, have iron powder added to the coating formulation of the E6013 electrodes.  This addition allows the electrode to be welded at higher currents, resulting in higher deposition rates and deposi- tion efficiencies.  Applications for the E7014 are similar to those of the E6013 electrodes. 3.4.1.5 The E7016 covered mild steel electrodes are, as indicated earlier, low hydrogen with a basic slag system.  This combination of attributes allows the electrode to be used to weld some of the higher carbon steels and some low alloy steels.  This electrode has dimin- ished in usage  because of its lower deposition rate and lower deposition efficiency than the more modern E7018 electrode. 3.4.1.6 The E7018 classification is the low hydrogen iron powder electrode.  The appre- ciable amount of iron powder in the coating and the somewhat heavier amount of coating on the core wire allow the electrodes to be used at higher currents than those used with the
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