TIG WELDING
TIG WELDING
TIG Welding - precision and versatility at its best
Achieve deep penetration, clean welds, and precise bead formation with OTC DAIHEN’s advanced TIG welding solutions.
Our TIG technology is one of the most versatile and precise welding processes, delivering exceptional control and high-quality welds across a wide range of materials – from aluminum and stainless steel to carbon steel and specialty alloys.
By utilizing different current types, such as AC and DC, OTC TIG welding offers specific benefits tailored to different material types.
Advantages of the TIG welding process:
- Deep penetration without preheating
- More precise formation of seam scaling (with cold wire)
- Particularly suitable for thin sheets and butt welds
- Highly effi cient with thicker aluminum materials
- Safe and stable arc start
- Low noise level due to sinusoidal current and controlled heat input
The process behind perfection
TIG welding uses a non-consumable tungsten electrode to create the arc, with the option of a separate filler material when needed. This method ensures clean, strong, and aesthetically refined welds, setting the gold standard for critical welding operations.
Why Choose TIG Welding by OTC DAIHEN?
TIG welding uses a non-consumable tungsten electrode to create the arc, with the option of a separate filler material when needed. This method ensures clean, strong, and aesthetically refined welds, setting the gold standard for critical welding operations.
- Impeccable Quality – flawless welds with exceptional aesthetics
- Maximum Precision – ideal for thin materials and high-accuracy applications
- Material Versatility – aluminum, stainless steel, steel, and more
- Deep Penetration & Clean Welds – superior durability and strength
With OTC DAIHEN TIG welding, you achieve the perfect balance of control, quality, and reliability, every time.
AC TIG Welding
AC TIG welding is most commonly applied in aluminum welding, as it uses AC TIG. During the positive half-cycle, the oxide layer on the metal surface is removed (cleaning effect). In the following negative half-cycle, the underlying base material is exposed and melted, which enables proper fusion.
AC/DC TIG Welding
AC/DC TIG welding integrates both AC and DC pulses. This hybrid mode is especially effective for welding thicker aluminum sections. It provides several benefits, such as deep penetration without preheating, longer electrode life, and accurate weld bead formation, particularly when combined with cold wire feeding.
DC TIG Welding
DC TIG welding is used for metals such as steel, stainless steel, copper, copper alloys, and titanium. It operates with DC to generate the welding arc, while argon shielding gas is separately supplied to protect both the arc and the weld zone.
Standard
This mode features a rectangular waveform in which the peak values of both polarities are identical. It allows welding across a wide range of sheet thicknesses. Because stable results can be achieved throughout the full current range, it is the most frequently used waveform.
Hard
In this rectangular waveform, the peak values of the polarities differ. The concentrated arc in DC TIG welding leads to increased penetration depth, making this mode ideal for fillet welds or root passes in multilayer welding. Of the three modes, it produces the least electrode wear, but generates the most arc noise.
Soft – silent arc
This mode uses a sinusoidal waveform where the peak values of both polarities are equal. It produces a softer arc, well-suited for thin sheets and butt welds. The arc operates quietly, with a maximum current of 200 A. Because of the sinusoidal current flow, heat input is precisely controlled and the noise level is significantly reduced.
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