
Device Funktions & Components
- MIG/MAG – Metal arc gas welding with direct current (DC). You can weld with inactive / inert (MIG, e.g., argon) or active (MAG, e.g., CO2) gases. Gas and welding wire come from a torch head and allow the work to be carried out with just one hand.
- Synergic wire feed: The welding current controls the wire feed speed entirely in accordance with the welding current.
- 2 in 1 combined device – MIG/MAG & MMA welding with up to 155 A.
- IGBT Technology – latest transistor technology enables highest power. No transformer, no MOSFET, modern IGBT.
- Lightweight & compact design – only 11,6 kg and dimensions of 450 x 240 x 370 mm. Innovative IGBT transistors save space and weight compared to the old MOSFET technology. No heavy carrying!
- Attention – Bottle connection: W21,8 x 1/14“ – Gas cylinders from the Netherlands and Great Britain may have a different connection! Please check the connections for compatibility before purchase!
Device Features & Benefits
- Highest efficiency & performance – Single phase current (230 V) supplies the device and allows an output power of real 155 amperes.
- Smart cooling & overheating protection – modern technology, built-in overheat protection and high-performance cooling allow you to get maximum performance.
- Flux cored wire– all our ST-Series devices can be used with flux cored wire. This allows welding without protective gas.
- Automatic wire feed– the wire feed speed is automatically controlled by the set welding current.
- Inductance – infinitely adjustable chocke, which smooths the welding current and improves the welding quality and ignition properties.

- Voltage – Variable voltage control to manually adjust the burn-in and burn-off of the wire, so the different properties of different materials can be taken into account.
- Manual wire thrust – no loss of gas or tedious pushing-through of the wire any more. If a new wire roll is to be fed through the hose package, this is done completely automatically with the wire feed button.
- Wire spool – commonly available 1 kg to 5 kg wire rolls can be processed here. The spool can accommodate 16mm and 50 mm spools.
- Wire drive reel – different wire thicknesses can be used by simply changing the drive roller from 0.6mm & 0.8mm & 1.0mm.
- MMA / Stick electrode welding– is a universal welding process. No protective gas is needed.
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Note: The unit is not intended for use in residential areas where power is supplied by a public low-voltage power supply system. It may be difficult to ensure electromagnetic compatibility in these areas due to both conducted and radiated interference.

Technische Daten
Output current | 40-155 A |
Protection type | IP21S |
Insulation class | F |
Power supply | 230 V AC (+-15%) / 1 ~ (single phase) |
Frequency | 50/60 Hz |
Maximum mains current (I1max) MIG / MMA | 25.1 A / 30.3 A |
Maximum effective mains current (I1eff) MIG / MMA | 8 A / 9.6 A |
Weight | 11,6 kg |
Dimensions L x W x H (mm) | 450 x 240 x 370 |
Mains connection | SchuKo-Bauart CEE 7/7 |
Standards | IEC 60974-1; EN 60974-10 (Class A) |
Lieferumfang
- The welding device STAHLWERK MIG MAG 155 ST.
- Professional MIG hose package "AK-15"/ 4 meter hose package with euro central connection.
- MIG accessory set 3-pieces (already pre - assembled on the MIG/MAG torch):
- 1 × gas nozzle
- 1 × gas nozzle carrier
- 1 × contact tip - Ground cable 5 meter.
- Electrode holder 5 meter.
- 1 x gas nozzle
- 1 x set of 4 current nozzles (1 x 0.6 / 0.8 / 1.0 / 1.2 each)
- Chipping hammer.
- Wire brush.
- Gas hose with quick couplung 5 meter.
- Weld wire feed roll 0.6 mm & 0.8 mm (the roll for 0.8mm & 1.0mm is already built in the device)
- Automatic welding helmet ST-900X
- 1 x MIG MAG welding wire ER70S-6 SG3 Ø 0,8 mm S100/D100 roll 1 kg
- Pressure regulator
- MIG MAG wear parts set 28 pieces
Take advantage and save on the purchase of this complete set compared to the purchase of individual items!
Note: The units of the latest generation may contain details that differ from the product images shown here. In the new design, the STAHLWERK lettering and the reference to the IGBT technology are omitted, as this is now installed as standard. We will update the pictures as soon as possible.
Note: Please note that the welding helmet is shipped separately. Due to the large scope of delivery, further partial deliveries are possible.
Note for our UK customers: Please note that import duties apply to goods valued at £135 or more.



