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Multi-Function Welder-MIG-TIG-MMA
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Order Code: W198
PULSE MIG 400K INVERTER - Multi-Function Welder-MIG-TIG-MMA (415V)
20-400 Amps
Part Number
Primary Input Voltage
415V / 3 Phase
Recommended Plug
Welding Current Range MIG
20 - 400 Amps
Welding Current Range MMA
20 - 400 Amps
Welding Current Range TIG
10 - 400 Amps
Duty Cycle
60% @ 400 Amps
Wire Spool Size
5 & 15kg
Ferrous Wire Size - Range
0.8 - 1.6mm
Stainless Steel Wire Size - Range
0.8 - 1.6mm
Aluminium Wire Size - Range
1.0 - 1.6mm
340 x 400 x 620mm
Weight (nett)
High Productivity Welding Solution
MIG -TIG - MMA - 400 Amp DC Welder
Synergic / Pulse / Double Pulse

The MULTI-400K is a complete and powerful multifunction DC inverter welding machine - 3 phase 400V.
An industrial machine with multiple welding functions including Pulse Mig, Double Pulse Mig, High Speed Mig, DC Tig, and DC MMA (Stick). User friendly programs with synergic function are provided for all the welding processes making it suitable for even the inexperienced user. The Multi-400K encompasses all facets of the new PLUS CONCEPT technological development. PLUS CONCEPT is an innovative solution that is revolutionising the welding industry. Now, high effificiency welding is possible with Gas Metal Arc Welding,
Pulse Arc and standard applications. The forced dynamism of the PLUS CONCEPT achieves an ultra fast transfer droplet rate into the weld pool giving surprising results, it increases signifificantly the welding speed (up to 45%) and, at the same time, it increases the penetration of the weld. Higher speed, better penetration and less spatter means less energy used during the deposit and reduced deformation during the welding. Using the Double Pulse function provides the ability to produce welds with TIG like finish with excellent control over the weld pool. The Multi-400K is a professional industrial machine that is supplied complete with trolley with gas bottle support, also with Push Pull Torch interface connection. Ideal for boat building, heavy fabrication and general engineering, sheet metal workshops, stainless steel fabricators, transport engineering, panel beaters, repair and maintenance workshops, Designed and built to meet with European norms conformity.

The Ergonomic and Auto Learning System is used in the powerful front panel interface where welding mode selection, program selection, adjustments and special settings coexist in a rugged panel, whereby a simple touch the user can instantly see the results they have selected.

Plus Concept Benefits:
The forced dynamism of the PLUS CONCEPT achieves an ultra fast transfer droplet rate into the weld pool giving surprising results: it increase significantly the welding speed (up to 45%) and, at the same time, it increases the penetration of the weld. Higher speed, better penetration and less spatter means less energy used during the deposit and reduced deformation during the welding.

Full Deeper Penetration:
Full penetration and greater depth of penetration in thicker materials can be obtained with the new PLUS CONCEPT programs. The increase in the arc transfer speed allows the welding of materials up to 15mm in one pass, with only a narrow gap, eliminating costly weld preps. This new process maintains the arc stability and allows long stick-out to enable the welding to be completed in a single pass. With this solution, due to the increased welding speed, a lot of time is saved and the energy required for the same weld is much less. Faster welding and energy reductions mean greater reduction of the distortion of the work-piece. Using PLUS CONCEPT in the application of heavy industry greatly improves the quality and notably reduces production costs.

High Speed Pulse Mig Application:
PLUS CONCEPT has available Pulse programs for most materials with better weld control and a smoother arc. Special waveforms and very fast dynamics increase the weld ability of all materials. A precision arc, smoother waveform and high frequency transfer allow a precise arc with lower pressure in the welding pool. As a result, the welding speed is increased up to 45% with the same arc energy as found in standard machines. The simplicity of the pulse control setting allows a fast approach to any welding, irrespective of the thickness and this results in a colder weld with exceptional appearance. Up to now, in certain applications where the pulse mig process would not be recommended, because of the higher heat in the join (compared to conventional welding), but now it is possible to improve quality and efficiency with the use of the new PLUS CONCEPT. Arc noise emissions are reduced with the smooth waveform in Pulse Mig too. It allows higher current applications without the typical loud noise of the arc.

Double Pulse Program:
The DOUBLE PULSE program can be easily selected. A simple click in the front panel will switch from a standard pulse application to the advanced and fast double pulse without any other settings required from the operator. The frequency of the DOUBLE PULSE is easily adjusted from 0.5 to 4.0 pulses per second. DOUBLE PULSE offers more control over the weld pool improving out of position welding, better controls distortion and gives excellent wash and even leg length on fi llet welds, an added bonus is the improved cosmetic appearance of the weld likened to a TIG fi nished weld.

Mig Brazing:
Programs for brazing are easy to use and covers special applications for the car industry and any welding with zinc steel.

Multi Function:
PLUS CONCEPT is not only an Innovative fast Pulse and fast MIG-MAG machine but MMA and TIG mode are also available. The MMA and TIG function are top level technology and offer professional results for expert users. MMA and TIG mode has both manual and synergic adjustment, when the Synergic mode is selected, the user selects the welding process, which enables self regulation of the welding parameters by simply selecting the work-piece thickness. Special Lift arc start is used for tig arc ignition which makes the use of high frequency negligible. Remote control receptacle is available for connection of remote amperage controls.
  • New "Plus Concept" Technology
  • Latest European IGBT Inverter Technology
  • High Speed Synergic Pulse Mig
  • Synergic Mig Double Pulse
  • High Speed Mig/Mag
  • DC Tig with Manual and Synergic Programs
  • MMA with Manual and Synergic Programs
  • VRD Safety (Voltage Reduction Device)
  • 2/4T Trigger Functions
  • Up Slope - Down Slope
  • Variable Start Current and Crater Current
  • Simple selection of welding programs
  • Simple interface for easy operation
  • Accepts wide voltage supply variations (170-270V)
  • DM36 3M Digital Sure Grip Ergo MIG torch with Euro connection
  • 4M ARC Welding lead set with 35/50 Dinse style connections
  • UNI-FLAME Twin Gauge Argon Regulator
  • Gas Hose with Fittings
  • Push Pull Torch Ready
Optional Accessories
  • Optional Water Cooling
  • Optional TIG Torch SR-18 Water Cooled TIG Torch with 35/50 Dinse style connections
  • Optional TIG Torch SR26-4MCP50 TIG Torch with 35/50 Dinse style connections
  • Optional Push Pull SGPPL360 Torch 8 Metre
  • Optional Water Cooled Push Pull Torch 8 Metre SGPPLW400
  • Optional Remote Wire Feed Unit Complete with 10 Metre Interconnecting Cables
Product Brochure
Multi Pulse Machines - Brochure
435.33 KB
Spare Parts Ordering
To assist you in ordering your spare part quicker than ever before, we have listed our most common spare parts to suit our Hafco Machinery for purchase online. Just choose between the 2 options outlined below, to find exactly what you are looking for. If you need further assistance please contact us.
Option 1
Browse through the "Common Spare Parts" tab below . Once you have identified your part, you can add it to your cart by clicking on the "+ ADD TO CART" button. If you wish to add multiples of this part you can either click the "+ ADD TO CART" button as many times as you like or click on the "VIEW CART" button and change the order quantity, prior to completing your order.
Option 2
If your part is NOT listed in the "Common Spare Parts" tab below , click the "MORE INFO" button to complete the "Spare Parts Enquiry Form".
This will provide you with the option to email your spare part enquiry direct to our Spare Parts and Service Department, or if you wish, you can download a printable version of this enquiry form which will include a copy of the Parts List to suit this machine (if available). Further instructions for the return email address or fax number of this printable form is provided on the document for your convenience.
NOTE: Please remember to clearly identify your part on the included parts diagram if necessary so that we can respond as quickly as possible with a price and availability for the part(s) you require.