XMT® 450 MPa


Portability and excellent arc performance make the XMT® family the most popular in the industry. The XMT® 450 MPa offers built-in pulse programs for standard steels, high-strength steels and aluminum.

Portability and excellent arc performance make the XMT® family the most popular in the industry. The XMT® 450 MPa offers built-in pulse programs for standard steels, high-strength steels and aluminum.

14-pin receptacle

has the flexibility to be used with spool guns, feeders, and remote controls.

Optional 115-volt auxiliary power

provides 10 amps of circuit-breakerprotected power for coolant systems, etc.

Optional Welding Intelligence™ system

XMT CC/CV and MPa models are Insight-capable to monitor weld voltage, amperage, and arc-time and percentage.

High-quality performance

in all welding processes.

Adaptive Hot Start™

makes starting stick electrodes easy without creating an inclusion.

Infinite arc control

available in the stick and wire modes for easier fine tuning of tough-to-weld materials and out-of-position applications.


provides arc starting that minimizes contamination of the electrode and without the use of high-frequency.

Wind Tunnel Technology.™

Internal air flow that protects electrical components and PC boards from dirt, dust and debris… greatly improving reliability.


cooling system operates only when needed, reducing noise, energy use and the amount of contaminants pulled through machine.

Unique case design

helps protect internal components from dirt and dust. To connect input power cord and/or set unit up for correct input power, remove the easy-to-handle panel (1/3 case). The remaining two-thirds of the case never needs to be removed!

Process selector switch

reduces the number of control setup combi nations without reducing any features.

Large, dual digital meters

are easy to view and are presettable to ease setting weld output.

Ultra-tough, polycarbonate-blended cover

protects front controls from damage.

Primary voltage display

shows what primary voltage the power source is linked for without removing the sidepanels. Saves time and assures you that the power source has been correctly linked for available input voltage.

Auto Remote Sense™

enables unit to automatically use remote control if connected to remote control receptacle.

Advanced arc control

enables an improved pulse welding arc. The operator has more control over puddle and bead characteristics using SharpArc. In addition, the unit provides a more robust and stable arc at very low arc length, reducing heat input, and providing the ability to weld on a wider range of material thickness.


controls the arc in pulsed MIG mode and gives total control over the arc cone shape, puddle fluidity and bead profile. If a gas is used other than what is listed in the chart above, SharpArc can be adjusted to help customize your arc to the gas being used. Lower SharpArc settings widen the arc cone, increase puddle fluidity and flattens the weld bead.

Built-in pulsed MIG programs

provide reduced heat affected zone, weld in all positions, great for thick-to-thin metal, good gap filling ability and faster travel speeds and deposition. See the table below for the wide range of pulsed MIG (GMAW-P) welding applications the XMT MPa models can handle.

What’s included

Stick (SMAW)
Flux-cored (FCAW)
Air carbon arc cutting and gouging (CAC-A)
Rated: 5/16-inch carbons
Capable: 3/8-inch carbons
*Available on select models.


General specification
Title XMT® 450 MPa
Industries Interests Construction
Truck/trailer manufacturing
Repair shops
Rental fleets
Power generation plants
Material Thickness
Weldable Metals Thin to thick,
all materials,
0,8-1.6 mm solid,
cored wires
Input Voltage 230/460 V or 575 V
Input Phase Requires 3-phase power
Input Hz 50 Hz
Amperage Range 15 – 600 A
Output Range 10–38 V, 15–425 A
Current Type
Rated Output 450 A at 38 VDC, 100% duty cycle
Max Open Circuit Voltage 90 VDC
Weld Output CC/CV
Net Width 368 mm (14.5 in.)
Net Height 438 mm (17.25 in.)
Net Length 689 mm (27.125 in.)
Net Weight 55.3 kg (122 lb.)
Warranty 3 Years
Miller’s True Blue Warranty