AC/DC TIG Welders for Aluminium and Steel

AC is what lets a TIG welder clean and weld aluminium; DC-only machines stop at steel and stainless. These are the AC/DC TIG welders in our catalog, ordered by the maker's top output, highest first.

Pulse settings and AC balance help control heat on thin aluminium. Many of these also stick weld. OSHA's minimum lens shade for TIG is 8 up to 150 amps and 10 above.

TIG is the slowest arc process and needs the cleanest metal, but gives the most control and the neatest beads.

#1 · Up to 250 A

Everlast Power Equipment PowerTIG-250EX AC/DC TIG Welder

The Everlast Power Equipment PowerTIG-250EX AC/DC TIG Welder puts out up to 250 amps by its maker's rating on 240-volt input. By Miller's 1 amp per 0.001 inch rule that's about 1/4 in of steel in one pass. Polarity: ac/dc. Pulse: Pulse. It suits aluminium and thin metal and steel to about 1/4 in per pass. Where it gives ground: duty cycle not stated with amps; needs a 240 V circuit.

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#2 · Up to 250 A

Sunstac TIG-250 TP ACDC AC/DC TIG Welder

The Sunstac TIG-250 TP ACDC AC/DC TIG Welder puts out up to 250 amps by its maker's rating. By Miller's 1 amp per 0.001 inch rule that's about 1/4 in of steel in one pass. Polarity: ac/dc. Pulse: Pulsed. It suits aluminium and thin metal and steel to about 1/4 in per pass. Where it gives ground: duty cycle not stated with amps. Shade for TIG. Aluminium needs clean metal and the right tungsten; follow the machine's guidance.

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#3 · Up to 250 A

Weldpro ACDC 250GD AC/DC TIG Welder

The Weldpro ACDC 250GD AC/DC TIG Welder puts out up to 250 amps by its maker's rating on 220-volt input. By Miller's 1 amp per 0.001 inch rule that's about 1/4 in of steel in one pass. Processes: Tig/Stick. Polarity: ac/dc. Pulse: pulse. It suits aluminium and thin metal and steel to about 1/4 in per pass. Where it gives ground: duty cycle not stated with amps; needs a 240 V circuit.

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#4 · Up to 225 A

AHP Alpha-TIG225Xi AC/DC TIG Welder

The AHP Alpha-TIG225Xi AC/DC TIG Welder puts out up to 225 amps by its maker's rating on 120-volt input. By Miller's 1 amp per 0.001 inch rule that's about 0.225 in of steel in one pass. Processes: TIG/Stick. Polarity: ac/dc. Pulse: Pulse. It suits aluminium and thin metal and steel to about 0.225 in per pass. Where it gives ground: duty cycle not stated with amps; 120 V caps output.

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#5 · Up to 220 A

Eastwood TIG 220 AC/DC TIG Welder

The Eastwood TIG 220 AC/DC TIG Welder puts out up to 220 amps by its maker's rating. By Miller's 1 amp per 0.001 inch rule that's about 7/32 in of steel in one pass. The maker's thickness claim: "welding 1/4"". Polarity: ac/dc. Pulse: pulse. It suits aluminium and thin metal and steel to about 7/32 in per pass. Where it gives ground: duty cycle not stated with amps. Shade for TIG.

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#6 · Up to 210 A

Everlast PowerTIG 210EXT AC/DC TIG Welder

The Everlast PowerTIG 210EXT AC/DC TIG Welder puts out up to 210 amps by its maker's rating on 240-volt input. By Miller's 1 amp per 0.001 inch rule that's about 0.210 in of steel in one pass. Polarity: Dc Tig. Pulse: pulse. It suits aluminium and thin metal and steel to about 0.210 in per pass. Where it gives ground: duty cycle not stated with amps; needs a 240 V circuit.

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#7 · Up to 200 A

LOTOS TIG200ACDC AC/DC TIG Welder

The LOTOS TIG200ACDC AC/DC TIG Welder puts out up to 200 amps by its maker's rating on 240-volt input. By Miller's 1 amp per 0.001 inch rule that's about 0.200 in of steel in one pass. Processes: Stick/MMA. Polarity: ac/dc. It suits aluminium and thin metal and steel to about 0.200 in per pass. Where it gives ground: duty cycle not stated with amps; needs a 240 V circuit. Check whether a foot pedal comes in the box; it makes amperage control much easier.

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#8 · Up to 200 A

YESWELDER TIG-200P ACDC AC/DC TIG Welder

The YESWELDER TIG-200P ACDC AC/DC TIG Welder puts out up to 200 amps by its maker's rating on 110 or 220-volt input. By Miller's 1 amp per 0.001 inch rule that's about 0.200 in of steel in one pass. The maker's thickness claim: "up to 1/8"". Processes: tig, stick. Polarity: dc tig. Pulse: AC Pulse TIG. It suits aluminium and thin metal and steel to about 0.200 in per pass. Where it gives ground: duty cycle not stated with amps.

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The list, rating by rating

Picking between them

Decide on AC first: you need it for aluminium. Then output for the thickest metal, pulse for thin work, and what's in the box (foot pedal, torch, gas lens).

TIG duty cycles are often higher than MIG at the same current, but compare at your amps using only stated ratings.

When another list fits better

For steel and stainless only, a DC TIG welder costs less.

Questions welders ask

Our editors choose and order the picks from the makers' own ratings; every pick meets the rule printed above. How we read a welder · Affiliate disclosure