Miller Gold Seal 160 i Manual del usuario - Página 18
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SECTION 6 – SELECTING AND PREPARING
NOTE
6-1. Selecting Tungsten Electrode
Electrode Diameter
2% Thorium Alloyed Tungsten (Red
Band)
.010"
.020"
.040"
1/16"
3/32"
1/8"
5/32"
3/16"
1/4"
Typical argon shielding gas flow rates are 15 to 35 cfh (cubic feet per hour) – 7 to 16.5 lpm (liters per minute).
*Not Recommended.
The figures listed are intended as a guide and are a composite of recommendations from American Welding Society (AWS) and electrode
manufacturers.
6-2. Safety Information About Tungsten
OM-189 116 Page 14
TUNGSTEN ELECTRODE
For additional information, see your distributor for a handbook on the Gas
Tungsten Arc Welding (GTAW) process. Wear clean gloves to prevent
contamination of tungsten electrode.
DC – Argon – Electrode Negative/Straight
Polarity
Up to 25
15-40
25-85
50-160
135-235
250-400
400-500
500-750
750-1000
1
2
Amperage Range - Gas Type
DC – Argon – Electrode Positive/Reverse
gtaw2 7/97
- Polarity
Polarity
*
*
*
10-20
15-30
25-40
40-55
55-80
80-125
Y Grinding the tungsten elec-
trode produces dust and fly-
ing sparks which can cause
injury and start fires. Use lo-
cal exhaust (forced ventila-
tion) at the grinder or wear an
approved respirator. Read
MSDS for safety information.
Consider using tungsten
containing ceria, lanthana,
or yttria instead of thoria.
Grinding dust from thoriated
electrodes contains low-lev-
el
radioactive
material.
Properly dispose of grinder
dust in an environmentally
safe way. Wear proper face,
hand, and body protection.
Keep flammables away.
1
Tungsten Electrode With
Balled End
2
Pointed Tungsten Electrode
Ref. S-0161