Lincoln Square Wave® 205 TIG Welder (K5613-1)

Precision Welding Made Simple

Whether you’re a professional fabricator, automotive enthusiast, aluminum welder, or someone who appreciates clean, beautiful welds, the Lincoln Square Wave® 205 TIG Welder delivers the performance and control you need to bring your projects to life.

Designed to make TIG welding more approachable without sacrificing professional results, the Square Wave® 205 combines advanced technology, user-friendly controls, and exceptional arc performance in one versatile machine. From delicate aluminum work to heavy-duty steel fabrication, this welder is built to help you achieve outstanding results with confidence.

Built for Welders Who Demand Quality

The Lincoln Square Wave® 205 is known for producing smooth, stable arcs that make welding easier and more enjoyable. Whether you’re creating custom automotive parts, fabricating motorcycle components, repairing equipment, or working on artistic metal projects, this machine gives you the precision needed to create clean, professional-looking welds.

Its intuitive interface makes setup quick and straightforward, allowing both experienced welders and beginners to spend less time adjusting settings and more time welding.

Why Welders Love the Square Wave® 205

✔ Outstanding AC and DC TIG welding performance

✔ Excellent aluminum welding capability

✔ Easy-to-use digital controls

✔ Smooth, stable arc for superior weld quality

✔ Stick welding capability for added versatility

✔ Lightweight and portable design

✔ Dual-voltage input for flexibility at home or in the shop

✔ Trusted Lincoln Electric reliability

Perfect for Aluminum and Precision Welding

One of the biggest reasons welders choose the Square Wave® 205 is its exceptional aluminum welding performance. The advanced AC TIG capabilities provide excellent puddle control and arc stability, helping you create cleaner welds with a professional finish.

Whether you’re welding aluminum fuel tanks, custom fabrication projects, automotive components, or decorative metalwork, this machine delivers the precision required for detailed work.

Key Features

AC/DC TIG Welding Capability

Switch seamlessly between AC and DC TIG welding to work on aluminum, steel, stainless steel, and other common metals.

Dual Voltage Flexibility

Operate on either 120V or 230V input power, making it easy to weld in a home garage, workshop, or professional fabrication environment.

User-Friendly Interface

The simple digital control panel allows you to make quick adjustments and customize your welding parameters with ease.

Stick Welding Capability

In addition to TIG welding, the Square Wave® 205 also offers stick welding functionality, providing extra versatility when tackling repairs and maintenance projects.

Portable Design

Lightweight and compact, this machine is easy to move around the shop or transport to different work locations.

Specifications

Specification	Details
Model	Lincoln Square Wave® 205
Product Number	K5613-1
Welding Processes	AC TIG, DC TIG, Stick (SMAW)
Input Voltage	120V / 230V Single Phase
Output Range (TIG)	5–205 Amps
Output Range (Stick)	5–180 Amps
Rated Output	205A @ 25% Duty Cycle
Duty Cycle	25% @ 205A
TIG Start Type	High Frequency Start
AC Frequency Range	Adjustable
AC Balance Control	Adjustable
Display Type	Digital Interface
Material Capability	Aluminum, Steel, Stainless Steel, Chromoly, Copper Alloys
Weight	Approximately 46 lbs (20.9 kg)
Dimensions (H x W x D)	Approx. 14 in x 10.75 in x 22.5 in
Generator Compatible	Yes
Warranty	Lincoln Electric Manufacturer Warranty

What’s Included

Everything you need to get started is included with the Lincoln Square Wave® 205 (K5613-1):

• Square Wave® 205 Power Source (K5613-1)
• Premium Caliber™ TIG Torch with Flexible Head — 12.5 ft, 200A rated
• Foot Amptrol® Control (K870) — 25 ft cable with 6-pin Lincoln connector
• Gas Regulator / Flowmeter with gas hose
• Work Cable and Clamp — 10 ft
• Electrode Holder with Cable — 200A, 35% duty cycle
• TIG Torch Consumable Kit, including:
  • Gas lenses
  • Ceramic cups
  • Ceriated tungsten electrodes (0.040″ to 3/32″)
  • Collets
  • Collet bodies
• 120V / 230V Input Power Adapter
• Operator’s Manual (printed copy and USB version)

Ideal For

• Aluminum fabrication
• Automotive restoration and customization
• Motorcycle fabrication
• Stainless steel projects
• Home workshops and garages
• Professional fabrication shops
• Artistic and decorative metalwork
• Equipment repair and maintenance

Frequently Asked Questions

Is the Lincoln Square Wave® 205 good for aluminum welding?

Yes. The Square Wave® 205 is specifically designed to excel at aluminum welding. Its AC TIG capabilities, adjustable AC balance, and frequency controls provide excellent puddle control and clean, professional-looking welds on aluminum.

Can beginners use the Square Wave® 205?

Absolutely. While it offers advanced features for experienced welders, the intuitive digital controls and user-friendly interface make it a great option for beginners learning TIG welding.

What materials can I weld with this machine?

The Square Wave® 205 can weld aluminum, mild steel, stainless steel, chromoly, copper alloys, and many other common metals using AC or DC TIG welding.

Does the Square Wave® 205 support Stick welding?

Yes. In addition to AC/DC TIG welding, this machine also supports Stick (SMAW) welding, making it a versatile solution for fabrication, repairs, and maintenance work.

Can I run this welder on household power?

Yes. The Square Wave® 205 features dual-voltage capability and can operate on both 120V and 230V power sources, giving you flexibility whether you’re working at home or in a professional shop.

Is a foot pedal included?

Yes. The package includes a Lincoln Foot Amptrol® Control (K870), allowing you to adjust amperage while welding for greater precision and control.

Is this welder portable?

Yes. Weighing approximately 46 lbs, the Square Wave® 205 is lightweight enough to move around the shop or transport to different job locations when needed.

Does the machine come ready to weld?

Yes. The Square Wave® 205 includes the TIG torch, foot pedal, regulator, cables, consumables, and other essential accessories needed to get started quickly.

A Favorite Among TIG Welders

The Lincoln Square Wave® 205 has earned a strong reputation among welders because it combines professional-grade TIG performance with easy operation. It’s powerful enough for demanding fabrication work while remaining approachable for those looking to improve their TIG welding skills.

Whether you’re building custom projects, repairing equipment, or creating precision welds on aluminum and stainless steel, this machine delivers the control, versatility, and reliability you need.

Available at Welder Vault

At Welder Vault, we know that great welding starts with dependable equipment. That’s why we’re proud to offer the Lincoln Square Wave® 205 TIG Welder. Combining precision, versatility, and Lincoln Electric’s trusted engineering, it’s a machine designed to help you produce your best work.

If you’re looking for a TIG welder that offers smooth performance, excellent aluminum capability, and professional-quality results, the Lincoln Square Wave® 205 is an outstanding choice.