Master M 205 and 323 – Portable MIG welders

Master M 205 and 323 – Portable MIG welders

The Master M 205 and the Master M 323 set new standards for power and performance in a portable MIG welding machine. With a compact, lightweight design that's easy to carry, you'll enjoy having a portable MIG welder that can be moved wherever you need it.

Experience portable power

Enjoy lightweight and portable welding power with no compromises.

Intuitive user interface

Including Weld Assist supporting welders in all situations.

High-quality welding results

Achieve state-of-art welding results with wide-ranging materials and thicknesses.

Portable MIG welding machines for total control anywhere

The Master M 205 and the Master M 323 set new standards for power and performance in a portable MIG welding machine. With a portable, lightweight design that's easy to carry, you'll enjoy having a portable MIG welder that can be moved wherever you need it. If you're working in tight spaces, the 5" LCD screen is bright and easy to read, while self-charging LED lights can be turned on to improve safety. They work with or without mains power.

The Master M 205 and Master M 323 are also easy to use. Both portable MIG welding machines come with Weld Assist, which offers automatic parameter settings that help you start welding quickly. It's a simple solution that welders can also use with minimal experience. Just select the material thickness, joint type, welding position, and start welding.

The Master M 205 is a portable pulse MIG welder with 200 amps of power at a 40% duty cycle. Take on a wider range of materials with pulse welding and do your best work anywhere with the convenience of a 1-phase power supply. Save time and take welding to the next level with 37 built-in MIG/MAG welding programs for Fe, Ss, AlMg5, AlSi5, CuSi3, and CuAl8 filler materials. The Master M 205 comes with 17 programs for pulse MIG and 20 programs for 1-MIG.

The Master M 323 is a high-performance portable MIG welding machine that delivers 320 amps of power at a 40% duty cycle. It's a portable and light small MIG welder ready for big jobs anywhere on site. Improve welding quality and save time with 28 built-in welding programs for Fe, Ss, AlMg5, AlSi5, CuSi3, CuAl8, and FC-CrNiMo filler materials. In addition, the Master M 323 portable MIG welder includes 4 welding programs for the MAX Cool arc welding process.

If you're looking for a portable MIG welder that can complete high-quality welds in challenging environments, the Master M 205 and Master M 323 should be on top of your list.

Master M 205 and 323 – Portable MIG welders

Portable MIG welding machines for total control anywhere

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Invest in work site safety and ergonomics

Invest in work site safety and ergonomics

Master M 205 and 323 are equipped with self-charging LED work lights for better safety and convenience. Use with or without mains power connected, and improve safety in low light conditions. In addition, both models are safe to lift from the handle by a crane. Lightweight models are easy to carry and enable working in tight spaces.

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Kemppi's advanced welding processes: MIG/MAG welding

Kemppi's advanced welding processes: MIG/MAG welding

One of the most important elements in developing welding equipment has long been improving welding processes and creating new process variations. Modern measurement and arc control methods have made a wide range of variations in the arc welding process possible. These advanced welding processes significantly improve welding production efficiency and weld quality. This article presents the special processes and operations developed by Kemppi for MIG/MAG welding.

MIG/MAG welding, Pulse welding

What is pulsed MIG welding, and for what you can use it?

What is pulsed MIG welding, and for what you can use it?

Pulsed MIG/MAG welding is a significant improvement in welding technology, offering accuracy, productivity, and flexibility that conventional welding methods can hardly compete with. This advanced process has become popular for professionals looking to improve weld quality, especially in demanding applications. Here's a closer look at how pulsed MIG/MAG welding works and the situations where it truly shines.

MIG/MAG welding, Pulse welding

MIG/MAG welding

MIG/MAG welding

MIG welding applications, equipment, and techniques

MIG/MAG welding, Shielding gas

High-quality pulse welding with a 1-phase MIG/MAG welding machine

High-quality pulse welding with a 1-phase MIG/MAG welding machine

The versatility of portable welding equipment has traditionally been limited by the lack of pulsed MIG/MAG welding. It has been argued that three-phase power is required to achieve high-quality MIG/MAG pulse welding.

Master M, MIG/MAG welding, Pulse welding

How to weld aluminum

How to weld aluminum

Some metals, like aluminum, have a naturally occurring, tough surface oxide layer. That surface oxide layer must be removed to enable successful welding. In the case of aluminum alloys, the surface oxide layer has a significantly higher melting temperature (approximately 2000°C) than the melting temperature of the aluminum base material (660°C).

Aluminum welding, MIG/MAG welding, TIG welding

What to consider when buying a welding machine?

What to consider when buying a welding machine?

Once a welding machine has reached the end of its life cycle, or a company expands its operations, it's time to find a new best friend for the welder. There is a wide range of welding machines on the market, and in many cases, comparing different brands and models is challenging. What kind of things should be considered when purchasing a welding machine?

Industrial welding, Welding process, MIG/MAG welding, TIG welding, Stick welding

A small welding powerhouse for the shipyard industry

A small welding powerhouse for the shipyard industry

Kemppi's new multi-process welding device is significantly smaller and lighter than its predecessors, but it stands tall both in terms of power and usability. The Master M 323 is specially designed for shipyard environments and won't leave the welder in trouble even in tight places.

Manual welding, Master M, MIG/MAG welding

MIG/MAG welding arc types

MIG/MAG welding arc types

In MIG/MAG welding, the mode of material transfer between the filler wire and the weld pool changes in line with the welding current.

Arc welding, Manual welding, MIG welding, MIG/MAG welding

Master M 205 GM — Technical data
DescriptionValue
Mains connection voltage220...240 V ±10 %
Mains connection voltage (MV low range)110...130 V ±10 %
Mains connection phases1~50/60 Hz
Mains connection cable typeH07RN-F
Mains connection cable size2.5 mm²
Maximum supply current (@MV low range) [I1max]28 ... 23 A
Rated maximum input power [S1max]6 kVA
Mains fuse16 A
Mains fuse (@MV low range)16 A
Idle state power consumption [P1idle]17 W
No-load state power consumption (MMA), power save17 W
No-load state power consumption (MMA), fans ON120 W
Output, duty cycle % at rated max. current, MIG40 %
Output at +40 °C, rated max current, MIG200 A
Output at +40 °C, 60% MIG170 A
Output at +40 °C, 100% MIG140 A
Output, duty cycle % at rated max. current, MIG (@MV low range)30 %
Output at +40 °C, rated max current, MIG (@MV low range)120 A
Output at +40 °C, 60% MIG (@MV low range)95 A
Output at +40 °C, 100% MIG (@MV low range)75 A
Output range, MIG15 A / 10 V ... 200 A / 28 V
Output range, TIG15 A / 1 V ... 200 A / 28 V
Output range, MMA15 A / 10 V ... 175 A / 31 V
Output range, MIG (@MV low range)15 A / 10 V ... 120 A / 21 V
Output range, TIG (@MV low range)15 A / 1 V ... 120 A / 21 V
Output range, MMA (@MV low range)15 A / 10 V ... 100 A / 24 V
Voltage adjustment range, MIG10 ... 32 V
VRD voltage24 V
Power factor at rated maximum current [λ]0.99
Efficiency at rated maximum current [η]84 %
EMC classA
Voltage supply for cooling unit220...240 V, 24 V
Welding connection typeEuro
Wire feed mechanismSingle-motor, 2-roll
Diameter of feed rolls32 mm
Filler wire diameter, Fe0.8 ... 1 mm
Filler wire diameter, Ss0.8 ... 1 mm
Filler wire diameter, Al0.8 ... 1.2 mm
Wire feed speed0.5 ... 25 m/min
Maximum wire spool weight5 kg
Maximum wire spool diameter200 mm
Maximum shielding gas pressure0.5 MPa
Control panel, modelCustom LCD
Control panel, displayColor LCD
Control panel, controls2 control knobs, Push buttons
Control panel, type of installationBuilt-in
Control panel, input voltage (DC)12 V
Operating temperature-20 ... 40 °C
Storage temperature-40 ... 60 °C
Recommended minimum generator power [Sgen]15 kVA
LED battery type and voltageSAMSUNG SDI (INR18650-26J; 3,6 V; 2600 mAh); LG CHEM (ICR18650HE4; 3,6 V; 2500 mAh)
Degree of protection (fully installed)IP23S
External dimensions, length520 mm
External dimensions, width250 mm
External dimensions, height379 mm
Weight without accessories16.2 kg
StandardsIEC 60974-1, -10
Master M 323 GM — Technical data
DescriptionValue
Mains connection voltage380...460 V ±10 %
Mains connection voltage (MV low range)220...230 V ±10 %
Mains connection phases3~50/60 Hz
Mains connection cable typeH07RN-F
Mains connection cable size2.5 mm²
Maximum supply current [I1max]19 ... 16 A
Effective supply current [I1eff]12 ... 10 A
Rated maximum input power [S1max]13 kVA
Mains fuse16 A
Mains fuse (@MV low range)32 A
Idle state power consumption [P1idle]19 W
No-load state power consumption (MMA), power save16 W
No-load state power consumption (MMA), fans ON120 W
No-load voltage [U0]69 ... 90 V
No-load voltage (@MV low range) [U0]40 ... 42 V
Open circuit voltage [Uav]66 ... 80 V
Output, duty cycle % at rated max. current, MIG40 %
Output at +40 °C, rated max current, MIG320 A
Output at +40 °C, 60% MIG250 A
Output at +40 °C, 100% MIG200 A
Output, duty cycle % at rated max. current, MIG (@MV low range)40 %
Output at +40 °C, rated max current, MIG (@MV low range)280 A
Output at +40 °C, 60% MIG (@MV low range)230 A
Output at +40 °C, 100% MIG (@MV low range)175 A
Output range, MIG15 A / 10 V ... 320 A / 34 V
Output range, TIG15 A / 1 V ... 320 A / 34 V
Output range, MMA15 A / 10 V ... 300 A / 34 V
Output range, MIG (@MV low range)15 A / 10 V ... 280 A / 32 V
Output range, TIG (@MV low range)15 A / 1 V ... 280 A / 33 V
Output range, MMA (@MV low range)15 A / 10 V ... 255 A / 33 V
Voltage adjustment range, MIG10 ... 40 V
VRD voltage24 V
Power factor at rated maximum current [λ]0.91
Efficiency at rated maximum current [η]87 %
EMC classA
Minimum short-circuit power of supply network [Ssc]1.6 MVA
Voltage supply for cooling unit24 V, 380...460 V
Voltage supply for cooling unit (MV low range)220...230 V, 24 V
Welding connection typeEuro
Wire feed mechanismSingle-motor, 2-roll
Diameter of feed rolls32 mm
Filler wire diameter, Fe0.8 ... 1.2 mm
Filler wire diameter, Ss0.8 ... 1.2 mm
Filler wire diameter, MC/FC1.2 ... 1.2 mm
Filler wire diameter, Al0.8 ... 1.2 mm
Wire feed speed0.7 ... 25 m/min
Maximum wire spool weight5 kg
Maximum wire spool diameter200 mm
Maximum shielding gas pressure0.5 MPa
Control panel, modelCustom LCD
Control panel, displayColor LCD
Control panel, controls2 control knobs, Push buttons
Control panel, type of installationBuilt-in
Control panel, input voltage (DC)12 V
Operating temperature-20 ... 40 °C
Storage temperature-40 ... 60 °C
Recommended minimum generator power [Sgen]20 kVA
LED battery type and voltageSAMSUNG SDI (INR18650-26J; 3,6 V; 2600 mAh); LG CHEM (ICR18650HE4; 3,6 V; 2500 mAh)
Degree of protection (fully installed)IP23S
External dimensions, length520 mm
External dimensions, width250 mm
External dimensions, height379 mm
Weight without accessories18.5 kg
StandardsIEC 60974-1, -10
Master M 205 GM AU — Technical data
DescriptionValue
Mains connection voltage220...240 V ±10 %
Mains connection voltage (MV low range)110...130 V ±10 %
Mains connection phases1~50/60 Hz
Mains connection cable typeH07RN-F
Mains connection cable size2.5 mm²
Maximum supply current (@MV low range) [I1max]28 ... 23 A
Rated maximum input power [S1max]6 kVA
Mains fuse16 A
Mains fuse (@MV low range)16 A
Idle state power consumption [P1idle]17 W
No-load state power consumption (MMA), power save17 W
No-load state power consumption (MMA), fans ON120 W
Output, duty cycle % at rated max. current, MIG40 %
Output at +40 °C, rated max current, MIG200 A
Output at +40 °C, 60% MIG170 A
Output at +40 °C, 100% MIG140 A
Output, duty cycle % at rated max. current, MIG (@MV low range)30 %
Output at +40 °C, rated max current, MIG (@MV low range)120 A
Output at +40 °C, 60% MIG (@MV low range)95 A
Output at +40 °C, 100% MIG (@MV low range)75 A
Output range, MIG15 A / 10 V ... 200 A / 28 V
Output range, TIG15 A / 1 V ... 200 A / 28 V
Output range, MMA15 A / 10 V ... 175 A / 31 V
Output range, MIG (@MV low range)15 A / 10 V ... 120 A / 21 V
Output range, TIG (@MV low range)15 A / 1 V ... 120 A / 21 V
Output range, MMA (@MV low range)15 A / 10 V ... 100 A / 24 V
Voltage adjustment range, MIG10 ... 32 V
VRD voltage24 V
Power factor at rated maximum current [λ]0.99
Efficiency at rated maximum current [η]84 %
EMC classA
Voltage supply for cooling unit220...240 V, 24 V
Welding connection typeEuro
Wire feed mechanismSingle-motor, 2-roll
Diameter of feed rolls32 mm
Filler wire diameter, Fe0.8 ... 1 mm
Filler wire diameter, Ss0.8 ... 1 mm
Filler wire diameter, Al0.8 ... 1.2 mm
Wire feed speed0.5 ... 25 m/min
Maximum wire spool weight5 kg
Maximum wire spool diameter200 mm
Maximum shielding gas pressure0.5 MPa
Control panel, modelCustom LCD
Control panel, displayColor LCD
Control panel, controls2 control knobs, Push buttons
Control panel, type of installationBuilt-in
Control panel, input voltage (DC)12 V
Operating temperature-20 ... 40 °C
Storage temperature-40 ... 60 °C
Recommended minimum generator power [Sgen]15 kVA
LED battery type and voltageSAMSUNG SDI (INR18650-26J; 3,6 V; 2600 mAh); LG CHEM (ICR18650HE4; 3,6 V; 2500 mAh)
Degree of protection (fully installed)IP23S
External dimensions, length520 mm
External dimensions, width250 mm
External dimensions, height379 mm
Weight without accessories16.2 kg
StandardsIEC 60974-1, -10
GX305GS 8m — Technical data
DescriptionValue
Welding torch cable length8 m
GX 305GMN 3.5m — Technical data
DescriptionValue
Welding connection typeEuro
Type of coolingAir
Contact tipM10x1
Method of guidanceManual
Load capacity 35% / Ar + 18% CO₂350 A
Load capacity test, filler wire diameter1.2 mm
Load capacity test, stick out length18 mm
Load capacity test, gas flow15 l/min
Gun handleYes
Neck typeChangeable, Rotating
Neck dimensions: length117 mm
Neck dimensions: height97 mm
Neck dimensions: angle50 °
Welding torch cable length3.5 m
Remote controlGXR10 (optional)
StandardsIEC 60974-7
GX 255G 3.5m — Technical data
DescriptionValue
Welding connection typeEuro
Type of coolingAir
Contact tipM6
Method of guidanceManual
Load capacity 35% / Ar + 18% CO₂250 A
Load capacity test, filler wire diameter1 mm
Load capacity test, stick out length15 mm
Load capacity test, gas flow13 l/min
Gun handleYes
Neck typeRotating
Neck dimensions: length114 mm
Neck dimensions: height65 mm
Neck dimensions: angle40 °
Welding torch cable length3.5 m
Remote controlGXR10 (optional)
StandardsIEC 60974-7
GX 253G 5m — Technical data
DescriptionValue
Welding connection typeEuro
Type of coolingAir
Contact tipM6
Method of guidanceManual
Load capacity 35% / Ar + 18% CO₂250 A
Load capacity test, filler wire diameter1 mm
Load capacity test, stick out length15 mm
Load capacity test, gas flow13 l/min
Gun handleYes
Neck typeRotating
Neck dimensions: length114 mm
Neck dimensions: height65 mm
Neck dimensions: angle40 °
Welding torch cable length5 m
Remote controlNo
StandardsIEC 60974-7
GXe 305W 5m — Technical data
DescriptionValue
Welding connection typeEuro
Type of coolingLiquid
Minimum coolant flow rate1 l/min
Minimum cooling power at 1 l/min0.9 kW
Contact tipM10x1
Method of guidanceManual
Load capacity 100% / Ar + 18% CO₂300 A
Load capacity test, filler wire materialFe
Load capacity test, filler wire diameter1.2 mm
Load capacity test, stick out length18 mm
Load capacity test, gas flow15 l/min
Gun handleYes
Neck typeStandard
Neck dimensions: length126 mm
Neck dimensions: height93 mm
Neck dimensions: angle48 °
Welding torch cable length5 m
Remote controlOptional
StandardsIEC 60974-7
GXe 305W 3.5m — Technical data
DescriptionValue
Welding connection typeEuro
Filler wire diameter0.8 ... 1.6 mm
Filler wire diameter, Fe0.8 ... 1.6 mm
Filler wire diameter, Fe-MC/FC0.9 ... 1.6 mm
Filler wire diameter, Ss0.8 ... 1.6 mm
Filler wire diameter, Ss-MC/FC0.9 ... 1.6 mm
Filler wire diameter, Al0.8 ... 1.6 mm
Type of coolingLiquid
Minimum coolant flow rate1 l/min
Minimum cooling power at 1 l/min0.9 kW
Contact tipM10x1
Method of guidanceManual
Load capacity 100% / Ar + 18% CO₂300 A
Load capacity test, filler wire materialFe
Load capacity test, filler wire diameter1.2 mm
Load capacity test, stick out length18 mm
Load capacity test, gas flow15 l/min
Gun handleYes
Neck typeStandard
Neck dimensions: length126 mm
Neck dimensions: height93 mm
Neck dimensions: angle48 °
Welding torch cable length3.5 m
Remote controlOptional
LED lightNo
Operating temperature-20 ... 40 °C
Storage temperature-40 ... 60 °C
StandardsIEC 60974-7
GXe 305G 5m — Technical data
DescriptionValue
Welding connection typeEuro
Type of coolingAir
Contact tipM10x1
Method of guidanceManual
Load capacity 35% / Ar + 18% CO₂300 A
Load capacity test, filler wire materialFe
Load capacity test, filler wire diameter1.2 mm
Load capacity test, stick out length18 mm
Load capacity test, gas flow15 l/min
Gun handleYes
Neck typeRotating
Neck dimensions: length135 mm
Neck dimensions: height96 mm
Neck dimensions: angle50 °
Welding torch cable length5 m
Remote controlOptional
StandardsIEC 60974-7
GXe 305G 3.5m — Technical data
DescriptionValue
Welding connection typeEuro
Type of coolingAir
Contact tipM10x1
Method of guidanceManual
Load capacity 35% / Ar + 18% CO₂300 A
Load capacity test, filler wire materialFe
Load capacity test, filler wire diameter1.2 mm
Load capacity test, stick out length18 mm
Load capacity test, gas flow15 l/min
Gun handleYes
Neck typeRotating
Neck dimensions: length135 mm
Neck dimensions: height96 mm
Neck dimensions: angle50 °
Welding torch cable length3.5 m
Remote controlOptional
StandardsIEC 60974-7
GXe 205G 5m — Technical data
DescriptionValue
Welding connection typeEuro
Filler wire diameter0.8 ... 1.2 mm
Filler wire diameter, Fe0.8 ... 1.2 mm
Filler wire diameter, Fe-MC/FC0.9 ... 1.2 mm
Filler wire diameter, Ss0.8 ... 1.2 mm
Filler wire diameter, Ss-MC/FC0.9 ... 1.2 mm
Filler wire diameter, Al0.8 ... 1.2 mm
Type of coolingAir
Contact tipM10x1
Method of guidanceManual
Load capacity 35% / Ar + 18% CO₂200 A
Load capacity test, filler wire materialFe
Load capacity test, filler wire diameter1 mm
Load capacity test, stick out length15 mm
Load capacity test, gas flow13 l/min
Gun handleYes
Neck typeRotating
Neck dimensions: length123 mm
Neck dimensions: height77 mm
Neck dimensions: angle45 °
Welding torch cable length5 m
Remote controlOptional
LED lightNo
Operating temperature-20 ... 40 °C
Storage temperature-40 ... 60 °C
StandardsIEC 60974-7
GXe 205G 3.5m — Technical data
DescriptionValue
Welding connection typeEuro
Type of coolingAir
Contact tipM10x1
Method of guidanceManual
Load capacity 35% / Ar + 18% CO₂200 A
Load capacity test, filler wire materialFe
Load capacity test, filler wire diameter1 mm
Load capacity test, stick out length15 mm
Load capacity test, gas flow13 l/min
Gun handleYes
Neck typeRotating
Neck dimensions: length123 mm
Neck dimensions: height77 mm
Neck dimensions: angle45 °
Welding torch cable length3.5 m
Remote controlOptional
StandardsIEC 60974-7
Master Cooler 05M — Technical data
DescriptionValue
Supply voltage380...460 V ±10 %
Supply voltage (MV low range)220...230 V ±10 %
Idle state power consumption [P1idle]5 W
EMC classA
Tank volume2.3 l
Cooling power at 1 l/min0.5 kW
Maximum coolant pressure4 Bar
Recommended coolantKemppi MGP 4456
Operating temperature-20 ... 40 °C
Storage temperature-40 ... 60 °C
Degree of protection (fully installed)IP23S
External dimensions, length555 mm
External dimensions, width253 mm
External dimensions, height215 mm
Weight without accessories11.5 kg
StandardsIEC 60974-2, -10

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The forerunners of arc welding

Kemppi is the design leader of the arc welding industry. Kemppi is the design leader in the arc welding industry. We are committed to boosting the quality and productivity of welding by continuous development of the welding arc and by working for a greener and more equal world. Kemppi supplies sustainable products, digital solutions, and services for professionals from industrial welding companies to single contractors. The usability and reliability of our products is our guiding principle. We operate with a highly skilled partner network covering over 70 countries to make its expertise locally available. Headquartered in Lahti, Finland, Kemppi employs over 650 professionals in 16 countries and has a revenue of 209 MEUR in 2023.

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