SECTION 5 − SELECTING AND PREPARING TUNGSTEN

ELECTRODE FOR DC OR AC WELDING

ac/dc_gtaw 2/2004

Y Whenever possible and practical, use DC weld output instead of AC weld output.

5-1. Selecting Tungsten Electrode (Wear Clean gloves To Prevent Contamination Of Tungsten)

 

 

Amperage Range - Gas Type- Polarity

 

 

 

 

 

 

Electrode Diameter

DC − Argon − Electrode

DC − Argon − Elec-

AC − Argon

AC − Argon −

 

Negative/Straight Po-

trode Positive/Rev-

 

Balanced Wave

 

larity

erse Polarity

 

 

 

 

 

 

 

 

 

2% Ceria (Orange Band), 1.5% Lan-

 

 

 

 

thanum (Gray Band), Or 2% Thorium

 

 

 

 

(Red Band) Alloy Tungstens

 

 

 

 

 

 

 

 

 

.010”

Up to 25

*

Up to 20

Up to 15

.020”

15-40

*

15-35

5-20

.040”

25-85

*

20-80

20-60

1/16”

50-160

10-20

50-150

60-120

3/32”

135-235

15-30

130-250

100-180

1/8”

250-400

25-40

225-360

160-250

5/32”

400-500

40-55

300-450

200-320

3/16”

500-750

55-80

400-500

290-390

1/4”

750-1000

80-125

600-800

340-525

 

 

 

 

 

Pure Tungsten

 

 

 

 

(Green Band)

 

 

 

 

 

 

 

 

 

.010”

Up to 15

*

Up to 15

Up to 10

.020”

5-20

*

5-20

10-20

.040”

15-80

*

10-60

20-30

1/16”

70-150

10-20

50-100

30-80

3/32”

125-225

15-30

100-160

60-130

1/8”

225-360

25-40

150-210

100-180

5/32”

360-450

40-55

200-275

160-240

3/16”

450-720

55-80

250-350

190-300

1/4”

720-950

80-125

325-450

250-400

 

 

 

 

 

Zirconium Alloyed Tungsten (Brown

 

 

 

 

Band)

 

 

 

 

 

 

 

 

 

.010”

*

*

Up to 20

Up to 15

.020”

*

*

15-35

5-20

.040”

*

*

20-80

20-60

1/16”

*

*

50-150

60-120

3/32”

*

*

130-250

100-180

1/8”

*

*

225-360

160-250

5/32”

*

*

300-450

200-320

3/16”

*

*

400-550

290-390

1/4”

*

*

600-800

340-525

 

 

 

 

 

ENGLISH

Typical argon shielding gas flow rates are 15 to 35 cfh (cubic feet per hour).*Not Recommended.

Figures listed are a guide and are a composite of recommendations from American Welding Society (AWS) and electrode manufacturers. OM-1603 Page 9

Page 11
Image 11
Miller Electric DB1812R, DB1825R manual Amperage Range Gas Type Polarity, DC − Argon − Elec AC − Argon AC − Argon

DB1812R, DB1825R specifications

The Miller Electric DB1825R and DB1812R are robust welders designed for professionals seeking superior performance and versatility in their welding applications. Both models reflect Miller Electric's commitment to innovation, combining advanced technology with practicality for optimal results in a variety of environments.

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In summary, the Miller Electric DB1825R and DB1812R bring a blend of power, versatility, and ease-of-use to the welding industry. Their advanced technology, durable construction, and user-friendly features make them ideal choices for professional welders looking to enhance productivity and achieve high-quality results in a range of welding applications.