TIG Welder For Material Type Aluminum Mild Steel Stainless Steel Input Frequency 60 Hz Phase Single-Phase Polarity AC/DC Series Precision TIG 275 Stick Welding Maximum Output Current 340 A Stick Welding Minimum Output Current 2 A Stick Welding Output @ Duty Cycle 225 A 60 Percent 275 A 40 Percent TIG Welding Maximum Output Current 340 A TIG Welding Minimum Output Current 2 A TIG Welding Output @ Duty Cycle 225 A 60 Percent 275 A 40 Percent