Used TIG Welders for Sale

Purchasing a used TIG welder can be an excellent way to add professional welding capability to your shop while reducing equipment costs. Many of the used TIG welding machines available at WeldingMart come from demo units, trade-ins, or professionally inspected equipment that has been tested for performance and reliability.

Fabrication shops often rely on Lincoln TIG welders because of their durability, arc stability, and ability to handle aluminum and stainless steel welding applications. These machines are commonly used in motorsports fabrication, industrial manufacturing, and custom metal fabrication.

If you are looking for new equipment, browse our full selection of professional TIG welders designed for fabrication shops and welding professionals.

You can also learn more about machine capabilities by visiting our Lincoln Electric TIG welder guide.

Why Buy a Refurbished TIG Welding Machine?

Purchasing a used TIG welder allows you to access advanced welding performance at a lower price point without sacrificing capability. Many of our machines include factory demo units, trade-ins, and certified refurbished systems from trusted brands like Lincoln Electric and other professional manufacturers.

Refurbished TIG welding machines are ideal for aluminum, stainless steel, and carbon steel applications where clean weld finishes and precise arc control are essential. Many models offer AC/DC capability, inverter efficiency, and adjustable waveform controls for demanding fabrication work.

If you prefer brand-new equipment, explore our full selection of New TIG Welders.

For a detailed breakdown of features and system comparisons, visit our TIG Welding Systems Guide.

For shops needing brand-new equipment, explore our full selection of TIG welders.

Supporting Equipment for TIG Welding

When purchasing a TIG welding machine, welders often upgrade or replace supporting components to maintain weld quality.

Browse our selection of professional TIG torches used in fabrication shops.
We also carry replacement TIG consumables such as cups, collets, and gas lenses.
For aluminum welding, browse our selection of aluminum TIG rod designed for aluminum fabrication.
Additional TIG welding accessories including adapters and specialty components are available here.

Using the correct consumables and torch setup improves arc control, weld consistency, and long-term machine performance.

Availability changes frequently, so check back regularly for the latest used TIG welders in stock.

Frequently Asked Questions

What should I check before buying a used TIG welder?

Test high-frequency (HF) start function — HF start components degrade over time and are expensive to repair. Verify that the machine produces a clean, stable arc at low amps (10–30A), which is where TIG deficiencies show first. Check the torch connection, gas solenoid operation, and that the foot pedal input (if applicable) responds correctly. On Lincoln Precision TIG and Aspect machines, confirm the AC Auto-Balance and pulse functions work if those features are important for your work. Look inside the case for corrosion or signs of overheating on circuit boards.

What is the difference between AC/DC and DC-only TIG welders, and which do I need?

DC TIG is used for steel, stainless steel, copper, and most non-aluminum metals. AC TIG is required for welding aluminum and magnesium because the alternating current breaks up the refractory oxide layer. An AC/DC machine (like the Lincoln Precision TIG 225, Aspect 230 AC/DC, or Square Wave TIG 200/205) handles all materials; a DC-only machine (like the Lincoln Aspect 230 DC, K4346-1) cannot weld aluminum. If you ever plan to weld aluminum, buy an AC/DC unit.

What amperage range do I need for a TIG welder — is 200A enough for shop work?

For most shop TIG work on steel, stainless, and aluminum up to 3/16 in. thick, 200A is adequate. Lincoln's Square Wave TIG 200 (K5126-1) delivers 200A at 25% duty cycle on 230V. For thicker aluminum (1/4 in. and above) or production work, you want 230–375A — the Lincoln Precision TIG 275 (K2619-2, 275A/40%) and Precision TIG 375 (K2622-2, 375A/40%) cover heavier work. Higher amperage also extends the usable duty cycle at moderate currents.

Do used TIG welders still require the same accessories as new ones — foot pedal, torch, gas regulator?

Yes. A used TIG welder needs the same accessories as a new machine: a TIG torch (e.g., PTA-17 or PTA-26 series from Lincoln), shielding gas regulator and argon cylinder, foot pedal or torch-mounted amperage control, and tungsten electrodes and consumables. Verify whether these accessories are included in the listing. A used Lincoln Precision TIG 225 Ready-Pak (K2535-1) typically includes the torch and regulator; bare power sources do not.

What Lincoln TIG welder models are typically available used, and how do their specs compare?

Common used Lincoln TIG models: Square Wave TIG 200 (K5126-1) — AC/DC, 200A/25%, 46.5 lbs, 120/230V dual input, good entry machine; Precision TIG 225 (K2533-2/K2535-1) — AC/DC, 130A/40% or 110A/60%, 192 lbs transformer-based, includes AC Auto-Balance and Micro-Start II; Precision TIG 275 (K2619-2) — AC/DC, 275A/40%, 397 lbs, widest output range 2–340A; Aspect 230 AC/DC (K4340-1) — 230A/35%, 50.5 lbs inverter, PowerConnect 120–460V input. The Precision TIG series are heavy transformer-based machines with proven longevity; the Aspect series are lighter inverters with more advanced controls.