Lincoln Electric IM467-B manual Table B.2 Typical Current RANGES1 for Tungsten ELECTRODES2

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B-18

 

 

 

 

 

OPERATION

 

 

 

 

 

B-18

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TABLE B.2

 

 

 

 

 

 

 

 

 

TYPICAL CURRENT RANGES(1) FOR TUNGSTEN ELECTRODES(2)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

AC

 

Approximate Argon

 

 

 

DCEN (-)

 

DCEP (+)

Unbalanced Wave

 

Balanced Wave

Gas Flow Rate

 

 

 

 

 

 

 

C.F.H. (l/min)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Tungsten

 

 

 

 

1%, 2%

 

 

1%, 2%

 

 

 

 

 

Electrode

1%, 2%

 

1%, 2%

 

Thoriated

 

 

Thoriated

 

 

 

 

TIG Torch

Diameter

Thoriated

 

Thoriated

Pure

Tungsten

 

Pure

Tungsten

 

 

Stainless

Nozzle

in. (mm)

Tungsten

 

Tungsten

Tungsten

Zirconated

 

Tungsten

Zirconiated

Aluminum

Steel

Size (4), (5)

.010

(.25)

2-15

 

(3)

2-15

2-15

 

2-15

—

3-8

(2-4)

3-8

(2-4)

4,5,6

 

 

 

0.020

(.50)

5-20

 

(3)

5-15

5-20

 

10-20

5-20

5-10

(3-5)

5-10

(3-5)

 

 

 

 

 

0.040

(1.0)

15-80

 

(3)

10-60

15-80

 

20-30

20-60

5-10

(3-5)

5-10

(3-5)

 

 

 

 

 

1/16

(1.6)

70-150

 

10-20

50-100

70-150

 

30-80

60-120

5-10

(3-5)

9-13

(4-6)

5,6

3/32

(2.4)

150-250

 

15-30

100-160

140-235

 

60-130

100-180

13-17

(6-8)

11-15

(5-7)

6,7,8

1/8

(3.2)

250-400

 

25-40

150-210

225-325

 

100-180

160-250

15-23

(7-11)

11-15

(5-7)

 

5/32

(4.0)

400-500

 

40-55

200-275

300-400

 

100-240

200-320

21-25

(10-12)

13-17

(6-8)

8,10

3/16

(4.8)

500-750

 

55-80

250-350

400-500

 

190-300

290-390

23-27

(11-13)

18-22

(8-10)

 

1/4

(6.4)

750-1000

 

80-125

325-450

500-630

 

250-400

340-525

28-32

(13-15)

23-27

(11-13)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(1)When used with argon gas. The current ranges shown must be reduced when using argon/helium or pure helium shielding gases.

(2)Tungsten electrodes are classified as follows by the American Welding Society (AWS):

Pure

EWP

1% Thoriated

EWTh-1

2% Thoriated

EWTh-2

Though not yet recognized by the AWS, Ceriated Tungsten is now widely accepted as a substitute for 2% Thoriated Tungsten in AC and DC applications.

(3)DCEP is not commonly used in these sizes.

(4)TIG torch nozzle “sizes” are in multiples of 1/16ths of an inch:

# 4

= 1/4 in.

(6mm)

# 5

= 5/16 in.

(8mm)

# 6

= 3/8 in.

(10mm)

# 7

= 7/16 in.

(11mm)

#8 = 1/2 in.

(12.5mm)

#10 = 5/8 in.

(16mm)

(5)TIG torch nozzles are typically made from alumina ceramic. Special applications may require lava nozzles, which are less prone to breakage, but cannot withstand high temperatures and high duty cycles. Currents above 350 amps require metal nozzles on water cooled torches.

SQUARE WAVE TIG 355

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Contents Square Wave TIG Safety Electric Shock can kill Cylinder may explode if damaged Précautions DE Sûreté Thank You Table of Contents Section D Section CSection E P196 SeriesTechnical Specifications Square Wave TIG InstallationSafety Precautions Select Suitable LocationHigh Frequency Interference Protection Ground Connection Input ConnectionsInput Supply Connection Electric Shock can killFigure A.2 Input Supply Connections Reconnect ProcedureTable A.2 Recommended Input Wire and Fuse Sizes Table A.1 Recommended Input Wire and Fuse SizesVolt/Freq Nameplate AWG Copper Cond Volt/Freq AC Output AWG Copper CondTIG Torch Connection Output ConnectionsLengths up to 100 to 200 ft 200 to 250 ft 100 ft 30 m 30 to 61 m 61 to 76 mStick Electrode Cable Connection Operating Instructions Safety InstructionsDesign Features and Advantages Operational Features and ControlsGeneral Description Recommended ProcessesLimitations Welding CapabilityUpper Case Front Controls Controls and SettingsSTEP/4-STEP Switch Mode SwitchHigh Frequency Switch Upper Case Front Control PanelPeak Current Control VOLTS/AMPS SwitchAC Wave Balance Auto Balance LEDSpot Controls Pulse ControlsStart Controls Crater Fill Controls Figure B.2 Status Indicator Light Sequence Square Wave TIGOperation Figure B.3 Lower Case Frontcontrols Square Wave TIG Lower Case Front ControlsOperation Hand and Foot Amptrol Operation Operation Initial START-UP Welding OperationStick Welding TIG Welding GuidelinesTable B.1 Specific Effects of Controls Illustrated in the 2-Step Mode for clarityOFF Crater Fill Switch onPulse Switch on Crater Fill Switch on Start Switch onSpot Switch OFF Spot Switch onDcen Dcep + Unbalanced Wave Balanced Wave Table B.2 Typical Current RANGES1 for Tungsten ELECTRODES2TIG Welding Sequence Operation 4-STEP Mode TIG Welding Sequence Operation 2-STEP ModeTable B.3 Recommended Settings for TIG Welding Polarity SwitchAuxiliary Power Overload ProtectionALL Machines OPTIONS/ACCESSORIES AccessoriesInput Power Factor Capacitor Discharge Procedure MaintenanceRoutine and Periodic Maintenance Figure D.2 General Component Locations General Machine Trouble Troubleshooting GuideSymptom Cause and Remedy Troubleshooting Guide Stick WeldingTroubleshooting Guide TIG Welding TIG Welding Lower Panel Controls K870 Foot Amptrol or K963 Hand Amptrol AccessoriesDiagrams Dimension Print Square Wave TIG355 Equipment MANUFACTURER’S Certification Equipment Installation CertificationPage Precaucion Aviso DE
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