KEMPPI MASTER M 323 GM

Kemppi Master M 323 GM — Portable Multiprocess MIG Welder (3-Phase, Generator-Compatible)

The Kemppi Master M 323 GM is a portable 3-phase multiprocess MIG welder delivering 320 A at a 40% duty cycle. Multi-voltage, generator-compatible. Features 32 pre-installed welding programs including MAX Cool, Weld Assist, DC TIG, MMA, and self-charging LED work lights. Weighs just 18.5 kg. Ideal for site welding, shipyards, and industrial fabrication.

What Is the Kemppi Master M 323 GM?

The Kemppi Master M 323 GM is a high-performance portable multiprocess MIG welder delivering 320 A at a 40% duty cycle from a 3-phase power supply. Weighing just 18.5 kg and compact enough to be used in confined spaces and restricted-access environments, it brings industrial-grade welding capability to wherever the job demands it — from shipyard compartments and pipe bays to remote construction sites and maintenance shutdowns.

The GM designation confirms generator compatibility and multi-voltage input: the machine accepts both standard 3-phase 380–460 V and a 3-phase 220–230 V low-range supply, providing genuine site flexibility across different power infrastructures.

In a single portable unit, the Master M 323 GM covers five welding processes: Manual MIG/MAG, 1-MIG (synergic), MAX Cool, DC TIG, and MMA (stick) — and arrives with 32 factory-installed welding programs ready to use from day one, covering the most common filler wire materials and diameters used in professional fabrication.

Designed specifically with shipyard and confined-space environments in mind, the 323 GM was engineered to be carried through hatches, rigged to a crane, and operated reliably in environments where larger machines simply cannot go — without sacrificing the output or feature set that industrial welding demands.

Designed and manufactured in Finland. Compliant with IEC 60974-1 and -10.

Key Features of the Kemppi Master M 323 GM

320 A Multiprocess Output in an 18.5 kg Package

At 18.5 kg without accessories, the Master M 323 GM delivers an exceptional power-to-weight ratio for a 3-phase industrial MIG/MAG welder. The compact 520 × 250 × 379 mm form factor allows it to be carried by hand through restricted access points, transported on a trolley across large sites, or crane-lifted to working level — all without the bulk and weight that comes with traditional industrial MIG machines of comparable output.

32 Factory-Installed Welding Programs — Ready From Day One

The Master M 323 GM ships with 32 factory-installed welding programs that are immediately usable straight out of the box — no additional work pack purchases, no waiting, no setup fees:

• 28 programs for 1-MIG (synergic) welding, covering the full range of common filler materials including Fe (mild steel solid wire), Ss (stainless steel), AlMg5, AlSi5 (aluminium), CuSi3 (silicon bronze), CuAl (aluminium bronze), Fe Metal (metal-cored), Fe Rutil (rutile flux-cored), and FC-CrNiMo (flux-cored CrNiMo) — from 0.8 mm to 1.6 mm wire diameter
• 4 programs for MAX Cool — Kemppi's specialist low-heat-input arc process for root pass welding, thin sheet work, and gap bridging

Between these 32 programs, the vast majority of professional MIG/MAG welding applications encountered in shipyard, fabrication, and maintenance environments are covered before a single parameter has been manually adjusted.

MAX Cool — Root Pass, Thin Sheet, and Gap Bridging

MAX Cool is a dedicated arc welding process built into the Master M 323 GM as a standard inclusion. It delivers a controlled, reduced heat-input arc specifically optimised for three challenging application types:

• Root pass welding — where consistent penetration and controlled heat input are critical to the integrity of the full joint
• Thin sheet welding — where conventional arc energy risks burn-through, distortion, or loss of fit-up
• Gap bridging — where joint preparation is imperfect or gaps exist that would cause standard arc settings to produce an unacceptable result

With 4 factory-installed MAX Cool programs covering common filler wires and material types, operators can switch to MAX Cool as quickly as selecting a program — no manual parameter tuning required.

Weld Assist — Up to 60% Faster Parameter Setup

Weld Assist guides operators through a simple on-screen selection of material thickness, joint type, and welding position — and automatically sets all relevant welding parameters for the selected program. According to Kemppi, Weld Assist enables parameter setup up to 60% faster than manual configuration. This benefit extends across the entire skill range: experienced welders get a fast, accurate starting point for any new job; less experienced operators get confidence that the machine is correctly configured before striking an arc.

6 Memory Channels

Six user-programmable memory channels allow frequently used welding configurations — material, process, parameters, and program — to be saved and recalled instantly. On multi-material or multi-joint jobs, memory channels eliminate repeat setup between tasks and reduce the risk of parameter entry errors between shifts or operators.

Multi-Voltage Operation — 400 V and 220–230 V (3-Phase)

The GM model accepts both 3-phase 380–460 V ±10% (standard industrial supply) and 3-phase 220–230 V ±10% (low-range multi-voltage input). This dual-voltage capability makes the 323 GM adaptable to different site power standards — domestically across Australian industrial facilities and internationally on projects where 3-phase voltage differs from the Australian standard.

Generator Compatible

The G designation confirms the Master M 323 GM is rated and certified for generator power supply, enabling full 320 A multiprocess welding output wherever 3-phase mains is unavailable — construction sites, shutdowns, remote infrastructure, mining operations, and offshore environments. Always confirm generator kVA capacity with your supplier prior to field deployment.

PowerLog — Trigger-Based Current Control

PowerLog is a gun trigger logic function that enables welders to switch between two or three independently configured power levels during welding by clicking the trigger — without stopping the arc or returning to the machine. This is particularly practical on jobs requiring different heat inputs across different sections of the same weld, or when moving between positions on a single component.

Auto Cable Calibration

The built-in automatic cable calibration function measures total welding circuit resistance and calibrates the digital meters to ensure that the arc voltage displayed accurately matches the actual voltage at the gun tip. The machine prompts recalibration when torch and earth cable length changes by 5 m or more — an important quality assurance step for site welders who regularly reconfigure their cable setup.

Gas Guard — Integrated Gas Regulation

The Master M 323 GM includes Gas Guard with an integrated gas regulation valve as standard. Gas Guard monitors shielding gas flow and alerts the operator if flow drops outside the acceptable range — helping to prevent weld quality issues caused by inadequate or interrupted shielding gas coverage, which is particularly valuable in outdoor or draughty site environments.

Self-Charging LED Work Lights

Built-in self-charging LED work lights provide illumination of the work area independently of mains power — running on their internal charge even during power transitions, generator starts, or in environments without a continuous power connection. In confined spaces, poorly lit structures, and night-time site work, these lights directly improve both weld quality visibility and operator safety.

Safe Crane Lift From Handle

The Master M 323 GM is rated for safe crane lifting from its handle with the full machine weight — including gun, wire, and cables — supported securely. This is a mandatory capability for shipyard applications and any work environment where machines must be rigged, hoisted to working decks, or repositioned vertically on structure.

5" LCD Screen

The bright 5" colour LCD display provides clear, easy-to-read parameter display in any lighting condition — including direct outdoor sunlight and low-light confined spaces. All key welding data is visible at a glance without the operator needing to return to a dim or awkwardly positioned control panel.

Compact, Confined-Space Design

The 323 GM's physical dimensions — 520 × 250 × 379 mm — were specifically designed to allow the machine to access spaces that larger MIG/MAG welders cannot. In shipyard applications, this means operating through access hatches and into tanks and voids. In construction, it means fitting into plant rooms, duct shafts, and other restricted work areas where welding still needs to happen.

Water-Cooled Torch Option

The Master M 323 GM supports the optional Master Cooler 05M water cooling unit, enabling extended high-output welding with water-cooled Flexlite GX torches. Water cooling reduces torch operating temperatures at sustained current levels, extending consumable life and improving operator comfort during intensive production welding sessions.

QR Code Product Access

A unique, scannable QR code on every Master M 323 GM provides instant mobile access to product and serial numbers, technical specifications, ordering codes, consumables, user manuals, and local dealer or service contact information.

Optional WeldEye Cloud Integration

The Master M 323 GM is compatible with Kemppi's WeldEye cloud-based welding quality management service, enabling digital recording of welding parameters, WPS management, and traceability reporting for quality-certified fabrication, shipbuilding, and engineering applications.

Who Is the Kemppi Master M 323 GM For?

The Master M 323 GM is designed for:

• Shipyard welders and boilermakers who need a high-output MIG/MAG machine compact enough to access tanks, voids, engine rooms, and structural compartments
• Site fabricators and construction welders requiring 320 A multiprocess capability from a generator or dual-voltage 3-phase supply
• Pipeline and pressure vessel welders needing MAX Cool for consistent, controlled root pass welding
• Maintenance and shutdown contractors who need a single machine to cover MIG, DC TIG, and MMA across a wide range of materials
• Offshore and marine operations where machine weight and form factor are as important as output and process capability
• Multi-material fabricators working across mild steel, stainless, aluminium, silicon bronze, and flux-cored processes on the same site or shift
• Operations running across mixed 3-phase voltage environments where multi-voltage flexibility reduces the need for separate machines or transformers

Kemppi Master M 323 GM — Technical Specifications

Pre-Installed Welding Programs — Master M 323 GM

Total: 28 x 1-MIG programs + 4 x MAX Cool programs = 32 factory-installed programs

Master M 323 GM vs Master M 205 GM AU — Key Differences

Frequently Asked Questions — Kemppi Master M 323 GM

What does GM mean on the Kemppi Master M 323? GM stands for Generator-compatible and Multi-voltage. The machine is rated for generator power supply and accepts both standard 3-phase 380–460 V and a 3-phase 220–230 V low-range input — providing site and cross-voltage flexibility without requiring a separate transformer or different machine.

What welding processes does the Master M 323 GM support? The Master M 323 GM supports Manual MIG/MAG, 1-MIG (synergic), MAX Cool arc welding, DC TIG, and MMA (stick) welding — five processes in one compact, portable machine.

What is MAX Cool on the Master M 323 GM? MAX Cool is a specialist arc welding process that delivers controlled, low-heat-input MIG/MAG welding specifically for root pass welding, thin sheet fabrication, and gap bridging. The 323 GM includes 4 factory-installed MAX Cool programs covering the most common applications, enabling operators to switch to MAX Cool instantly without manual parameter adjustment.

How many welding programs does the Master M 323 GM come with? The Master M 323 GM comes with 32 factory-installed welding programs: 28 for 1-MIG (synergic) welding across Fe, Ss, AlMg5, AlSi5, CuSi3, CuAl, Fe Metal, Fe Rutil, and FC-CrNiMo filler materials, and 4 for the MAX Cool arc process — all usable from day one with no additional purchase required.

What is the duty cycle of the Master M 323 GM? The Master M 323 GM delivers its rated maximum output of 320 A at a 40% duty cycle. For lower-output continuous welding, the machine sustains operation at reduced current levels at higher duty cycles.

Does the Master M 323 GM have pulse MIG welding? No. The Master M 323 GM supports Manual MIG, 1-MIG (synergic), and MAX Cool arc processes. Pulse MIG is available on the single-phase Master M 205 model. For pulse MIG capability in a 3-phase portable machine, refer to the Master M 353 or 355 models in the broader Master M range.

How heavy is the Kemppi Master M 323 GM? The Master M 323 GM weighs 18.5 kg without accessories — making it one of the lightest 3-phase 320 A multiprocess MIG welders available. Its compact dimensions (520 × 250 × 379 mm) and crane-liftable design make it genuinely portable for shipyard, site, and confined-space applications.

Is the Master M 323 GM suitable for shipyard use? Yes. The Master M 323 GM was specifically designed with shipyard environments in mind. Its compact dimensions allow access through hatches and into tanks, voids, and compartments. The safe crane-lift-rated handle enables rigging and hoisting to working decks. The self-charging LED work lights operate without mains power. These features, combined with 320 A multiprocess output and MAX Cool for root pass welding, make it one of the most capable portable welders available for marine construction and ship repair.

Can the Master M 323 GM be used for DC TIG welding? Yes. In addition to MIG/MAG processes, the Master M 323 GM supports DC TIG welding when used with a compatible Flexlite TX TIG torch with euro connector — covering stainless steel, mild steel, and other metals that weld in DC mode. For AC TIG welding on aluminium, see the Kemppi Master T series.

Is a water-cooled version of the Master M 323 GM available? Yes. The optional Master Cooler 05M cooling unit pairs with water-cooled Flexlite GX torches, enabling extended high-output welding sessions with improved torch thermal management and longer consumable life.