Miller Gold Seal 160 i Owner's Manual download pdf (Page 18)

OM-189 116 Page 14

SECTION 6 – SELECTING AND PREPARING

TUNGSTEN ELECTRODE

gtaw2 7/97

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.

NOTE

6-1. Selecting Tungsten Electrode

Amperage Range - Gas Type♦ - Polarity

Electrode Diameter DC – Argon – Electrode Negative/Straight

Polarity

DC – Argon – Electrode Positive/Reverse

Polarity

2% Thorium Alloyed Tungsten (Red

Band)

.010” Up to 25 *

.020” 15-40 *

.040” 25-85 *

1/16” 50-160 10-20

3/32” 135-235 15-30

1/8” 250-400 25-40

5/32” 400-500 40-55

3/16” 500-750 55-80

1/4” 750-1000 80-125

♦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

Ref. S-0161

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

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 27 28

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Miller Gold Seal 160 i Owner's Manual Page 18

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