Hobart Welding Products 140 manual Typical MIG Process Control Settings, Thickness to Amperage a

9-2. Typical MIG Process Control Settings

NOTE

These settings are guidelines only. Material and wire type, joint design, fitup, position, shielding gas, etc. affect settings. Test welds to be sure they comply to specifications.

Material thickness determines weld parameters.

1/8 or 0.125 inConvert Material

Thickness to

Amperage (A)

(0.001 in = 1 ampere)

0.125 in = 125 A

.035 in

Wire Size	Amperage Range
0.023 in		30 − 90 A
0.030 in	40 − 145 A
0.035 in	50 − 180 A

Select Wire Size

Wire	Recommendation	Wire Speed	Select Wire Speed
Size		(Approx.)	(Amperage)
0.023 in	3.5 in per ampere	3.5 x 125 A = 437 ipm	125 A based on 1/8 in
0.030 in	2 in per ampere	2 x 125 A = 250 ipm	material thickness
0.035 in	1.6 in per ampere	1.6 x 125 A = 200 ipm

ipm = inches per minute

Low voltage: wire stubs into work	Select Voltage
High voltage: arc is unstable (spatter)
Set voltage midway between high/low voltage

Wire speed (amperage) controls weld penetration (wire speed = burn-off rate)

Voltage controls height and width of weld bead.

Ref. 803 710-C

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