TIG Knowledge – RED by Lorch

The advantages of the TIG welding process are:

With TIG welding, we achieve a very intense and focused arc.

The advantages are minimal heat input, the narrow seam, and the possibility of welding without filler materials. The base material fuses only with itself, resulting in a perfect appearance for visible seams.

With good TIG inverters, very low currents can be set, making welding of very thin material possible.

The advantages of TIG welding have long been profitable in industry and workshops. Whenever requirements such as tightness, food safety, or visible aesthetics are demanded of a weld seam, whether in stainless steel or aluminium, TIG is the solution. Previously, TIG machines were large and heavy. Additionally, the settings were complicated and the purchase price high. Thus, TIG systems were essentially only found in industrial companies.

However, the increased use of stainless steel and aluminium requires metalworking trades to perform more TIG welding – also on site.

TIG welding for you.

And to make this completely hassle-free for you, we have developed our portable RED by Lorch TIG machines. Small, light, and handy. And so easy to operate because we have integrated many of the settings you previously had to adjust as assistance systems during development. A few steps and you can start immediately. The rest runs in the background. Operate – without needing to deal with it.

What does this technology bring you?

With TIG welding, you can carry out your projects with the highest precision – completely without annoying welding spatter. The fine, clean seam not only ensures an excellent appearance but also saves you a lot of rework. Thanks to the simple handling and the ability to process a wide range of materials such as stainless steel, aluminium, or thin-walled steel, you are extremely versatile. Whether for visible decorative seams, delicate repairs, or creative custom builds – with TIG you achieve results that not only hold but also look really good.

What else should you know.

A distinction is made between direct current (DC) and alternating current (AC) welding. Steel, stainless steel, and copper are welded with direct current, aluminium and magnesium with alternating current. Another important distinction is the ignition method:
A differentiation is made between contactless HF (= high frequency) ignition and contact ignition, also called ContacTIG ignition. In contact ignition, the tungsten electrode is placed on the workpiece – a small current flows, and by slightly lifting, the machine switches to welding current, igniting the arc.

Recommended TIG welding parameters for different materials.

This table shows you which settings and components are recommended for TIG welding depending on the material and material thickness.
It contains suitable values for steel and stainless steel, copper and copper alloys, and aluminium for:

Material thickness – the thickness of the workpiece to be welded.
Tungsten electrode diameter – appropriate for material thickness and current strength.
Welding current (amperes) – recommended range for a clean seam.
Gas nozzle size – for optimal shielding gas coverage.

Advantage:
With this overview, you can quickly find the right parameters for your material. This ensures consistently clean weld seams, prevents material defects, and makes setting up your machine much easier – whether you are working on thin sheets or thicker workpieces.

Material	Material thickness (mm)	Tungsten electrode ∅ (mm)	Welding current (A)	Gas nozzle
Steel and stainless steel	1.0	1.0	15 - 60	Size 4
	1.5	1.0 - 1.6	40 - 80	Size 5
	2.0	1.6	70 - 120	Size 5
	3.0	1.6 - 2.4	90 - 150	Size 6
	4.0 - 6.0	2.4 - 3.2	140 - 180	Size 7
Copper and copper alloys	1.0	1.0	60 - 80	Size 4
	1.5	1.6	100 - 150	Size 5
	3.0	2.4	150 - 180	Size 6
Aluminium	1.0	1.0	10 - 60	Size 4
	1.5	1.6	40 - 80	Size 5
	2.0	1.6	70 - 120	Size 5
	3.0	2.4	90 - 150	Size 6
	4.0	3.2	140 - 180	Size 7
	5.0	3.2	170 -180	Size 7