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9.3.
Selecting Tungsten Electrode (Wear Clean Gloves To Prevent
Contamination Of Tungsten)
Electrode Diameter
2 % Ceria, 1.5% Lanthanum, Or 2% Thorium Alloy Tungstens
1/16" (1.6 mm)
3/32" (2 .4 mm)
1/8" (3.2 mm)
Pure Tungsten Not Recommended For DCEN − Argon
♦Typical argon shielding gas flow rates are 10-15 L/Min.
Figures listed are a guide and are a composite of recommendations from American Welding Society
(AWS) and electrode manufacturers.
9.4.
Preparing Tungsten For DC Electrode Negative (DCEN) Welding
Radial Grinding
Causes Wandering Arc
Wrong Tungsten Preparation
1. Grinding Wheel: Grind end of tungsten on fine grit, hard abrasive wheel before welding. Do
not use wheel for other jobs or tungsten can become contaminated causing lower weld quality.
2. Tungsten Electrode: 2% ceriated tungsten is recommended.
3. Flat: Diameter of this flat determines amperage capacity.
4. Straight Ground: Grind lengthwise, not radial.
10. Stick welding (SMAW) guidelines
10.1.
Stick Welding (SMAW) Techniques
EN
Amperage Range - Gas Type♦ - Polarity
DCEN) – Argon
Direct Current Electrode Negative
(For Use With Mild Or Stainless Steel
50 - 160 A
130 - 250 A
250 - 400 A
2-1/2 Times
Electrode Diameter
Ideal Tungsten Preparation − Stable Arc
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