The Lincoln Electric Lincoln Power Wave S500 Advanced Process Multi-Process Welder is a high-performance advanced-process welding power source engineered for demanding industrial, fabrication, and automated welding applications. Supporting MIG (GMAW), Pulse MIG (GMAW-P), Flux-Cored (FCAW), Stick (SMAW), and TIG (GTAW), this machine leverages Lincoln Electric's Waveform Control Technology® to deliver unmatched arc consistency, repeatability, and process flexibility on critical weldments.
With up to 500 amps of advanced waveform output, the Power Wave S500 supports Lincoln Electric's full library of Waveform Control Technology® programs, enabling processes from standard MIG and flux-cored to Pulse, STT® surface-tension transfer, and Rapid Arc® for high-speed applications. The U2904-1 factory demo unit is fully inspected and performance-certified by Lincoln Electric, available at a significant discount from new-unit pricing.
- K2904-1 – Power Wave S500 Advanced Process Welder
- U2904-1 – Power Wave S500 Advanced Process Factory Demo Welder
- Advanced waveform control enables precise arc shaping for each welding process and material type
- Multi-process capability: GMAW, GMAW-P, FCAW, SMAW, and GTAW from a single machine
- Up to 500 amps of output with broad duty cycle for production and semi-automated welding
- Ethernet connectivity for remote monitoring, weld data logging, and Lincoln Electric CheckPoint® integration
- Compatible with Lincoln Electric PowerFeed wire feeders and automated welding systems
- Robust industrial enclosure rated for demanding shop and production environments
- Factory demo unit inspected and certified to identical performance standards as new equipment
- Structural steel and heavy plate fabrication with Pulse MIG or FCAW
- Pipe root-pass welding using STT® surface-tension transfer process
- Pressure vessel and code-quality weld applications requiring arc data monitoring
- Automated and semi-automated welding cells integrated with Lincoln PowerFeed systems
- Shipbuilding, offshore, and heavy industrial manufacturing
The Lincoln Electric Lincoln Power Wave S500 Advanced Process Multi-Process Welder represents the pinnacle of industrial welding power source technology, combining advanced waveform control, multi-process flexibility, and robust connectivity into a production-ready platform. Whether you select the new unit for complete warranty coverage or the factory-certified demo model for exceptional value, both configurations deliver the arc performance and process reliability that code-quality fabricators and industrial manufacturers demand.
The Power Wave S500 Advanced Process Multi-Process Welder supports MIG (GMAW) and flux-core (FCAW) welding as primary processes. Multi-process models in this family may also support Stick (SMAW) and DC TIG (GTAW). Check the spec sheet for full process compatibility for your specific unit.
Most Lincoln Electric MIG welders in this class accept .023", .030", and .035" solid wire, and .030"–.045" flux-core wire. Some heavy-duty models accept up to .052" wire. Always refer to the owner's manual for the wire size and drive roll requirements specific to your model.
Duty cycle and output amperage vary by model. Lincoln Electric MIG welders in this range typically offer 100–350+ amps of output. Duty cycle at maximum output is listed in the spec sheet — higher-tier industrial models run at 60–100% duty cycle at rated amperage for continuous production welding.
Input power requirements depend on the specific model. Smaller MIG welders (140–215A class) typically run on single-phase 120V or 240V. Larger industrial machines (260A and above) may require single-phase 240V or three-phase 208/230/460V. Check the spec sheet for the exact input power requirements for your unit.
Yes — this is a factory demo or low-hour unit sourced directly from Lincoln Electric. Units may show light cosmetic wear but are mechanically sound and have been tested before sale. The warranty on this unit is the same as on a new machine. Lincoln’s Industrial Limited Warranty (form IMWS1, Apr-2026) lists a 5-year warranty period for “Power Wave® machines”, and Lincoln states: “Lincoln will assume both the parts and labor expense of correcting defects during the warranty period.” Source: Lincoln Electric Industrial Limited Warranty (form IMWS1, Apr-2026).
For solid wire MIG welding, a 75% Argon / 25% CO2 (C25) mix is the most common choice for steel. 100% CO2 is also used for cost-sensitive applications. Flux-core wire can be run with or without shielding gas depending on the wire type. TIG welding (if supported) requires 100% Argon. Always confirm gas requirements in the owner's manual.