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Top Features

  • DC CC CV
  • Multi-Process Capability
  • Variable Arc Control, Multi-Voltage Input
  • Full-Featured Remote Control Capability
  • IP23 Rating for Outdoor Operation and Storage
  • Available in 4Pak and 6Pak Configurations
  • Processes: Stick (SMAW), TIG (GTAW), MIG (GMAW), Multiprocess, Air Carbon Arc Cutting, Flux-Cored (FCAW)

This multiprocess welder delivers up to 500 amps of welding power for a variety of applications, including construction and fabrication. It features an IP23 rating for outdoor operation and storage, and the latest inverter technology will save you real dollars on the utility costs associated with your welding operations.

Product Details


Input Voltage: 380/460/575/3/50/60
Input Current at Rated Ouput: 3 phase/60% Duty Cycle: 37/27/22 A
Output Range: 10 - 500 A
Weight: 125 lb (56.8 kg)
Dimensions: 18.8" (477 mm) W 14" (356 mm) D 26.5" (673 mm)


Stick (SMAW)




Air Carbon Arc Cutting

Flux-Cored (FCAW)

Additional Features


  • Flexible Multi-Process Capability – Including stick, Touch Start TIG (DC), MIG, flux-cored welding and carbon arc gouging with up to a 3/8 in. (9.5 mm) carbon
  • Faster Arc Response means smoother arc action and more consistent bead appearance
  • Low Power Consumption results in daily operational cost savings
  • Enhanced Portability – Typically 50% less weight, size and footprint
  • Simple Operation – The user interface is designed with the operator in mind. Set up is easy for even the most novice welder
  • Bright Digital Amp and Volt Meters – Easy to monitor, even in sunlight, and presettable for precise procedure control
  • Compact, Durable Case – Tough IP23 enclosure rating ensures the Flextec™ 450 will withstand extreme field environments
  • Selectable Hot Start – Turn it off for thin material or flip it on to get the extra starting amperage you need for thick rusty or dirty material
  • Variable Arc Control – In stick mode, vary the arc force to obtain the “soft” or “crisp” arc you want as conditions require. In CV modes, vary the pinch or inductance to control spatter, fluidity and bead appearance
  • Full-Featured Remote Control Capability – Use a foot pedal or hand control to remotely vary output up to 100 ft. (30.5 m) away
  • Desert Duty Rated – Welding outputs are rated for extreme temperature operation up to 55°C

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Airgas, an Air Liquide company, is the nation's leading single-source supplier of gases, welding and safety products. Known locally nationwide, our distribution network serves more than one million customers of all sizes with a broad offering of top-quality products and unmatched expertise.