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AC/DC TIG welding machines weld with alternating current (AC) for aluminum and direct current (DC) for steel and stainless steel. That makes them the choice for aluminum fabricators, stainless steel shops, motorcycle and auto restorers and maintenance welders who need clean, precise welds on several metals. Most models here also weld with stick electrodes (MMA).
How to choose an AC/DC TIG welder
- Amperage: 200A machines handle thin aluminum and stainless sheet. 250A to 315A machines weld thicker aluminum and run longer at higher current.
- Pulse: pulse models such as the Rilon TIG 200P, Riland TIG 250P and Powerhouse TIG250 PULSE control heat on thin metal and help reduce warping.
- 2-in-1 TIG and stick: TIG-MMA or TIG-ARC machines also stick weld for structural and repair jobs.
- Torch and foot pedal: check which torch is included, and whether the machine supports a foot pedal if you want to control current while welding.
Popular AC/DC TIG welders at KHM Megatools
| Model | Brand | Amperage | Good for |
|---|---|---|---|
| TIG 200G / TIG 200P | Rilon | 200A | Starting out with aluminum and thin stainless |
| ING-ACDCTIG20068 | Ingco | 200A | Light fabrication and repair |
| TIG-200P | Shinsetsu | 200A, pulse | Thin sheet with less warping |
| TIG 250P / TIG 315 | Hitronic | 250A / 315A | Daily shop work on aluminum and stainless |
| TIG 250P | Riland | 250A, pulse | Fabrication shops welding thin to medium sheet |
| TIG 300 / TIG Striker 300 | Powerhouse | 300A | Thicker aluminum and longer welds |
| TIG375P / T350-PRO | Daiden / Kobewel | Higher output | Heavy aluminum work and production |
AC/DC or DC-only TIG?
If you only weld steel and stainless steel, a DC-only TIG welding machine is simpler and more affordable. For aluminum you need AC. Complete your setup with an argon regulator, a spare TIG torch and an auto-darkening helmet.
All products from KHM Megatools are genuine and covered by the manufacturer's warranty where applicable.
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