Perfect Welding

The current page does not exist in the target language.

Do you want to change the language and go to the home page or do you want to stay on the current page?

Change Language
Perfect Welding



... with nearly 170 optimized characteristics, the TransSteel series features the characteristics demanded by the heavyduty steel construction sector.Yet the power source remains versatile: The TransSteel versions with the Pulse function make child's play of applications involving aluminum and stainless steel. SMEs can benefit from this variety of materials, as just one device is all they need to cover a wide range of applications. The underlying philosophy – stay on top of things. The function spectrum of the TransSteel has therefore been deliberately reduced to the essentials in all areas according to the motto - as much as necessary, with the best possible overview and ease of handling. 
Please choose your desired product.

The TransSteel 3500 stands for reliability, the greatest possible ease of use and perfect steel welding. The lightweight, robust module with hosepack, welding torch and display ensures that the filler wire advances reliably. The Comfort Wire function automatically takes care of wire threading. The user can easily remove the portable wirefeeder and carry it to welding locations that are difficult to access. Irrespective of the position of the hosepack, the welding parameters remain stable. With an output of up to 350 A, the TransSteel 3500 welding system is available in both gas-cooled and water-cooled versions.

Product details


Mains voltage3 x 380V / 400V / 460V
Mains voltage tolerance-10 / +15%
Mains frequency50-60Hz
Welding current min.10 A
Welding current max.350 A
Welding current / Duty cycle [10min/40°C]350A / 40%
Welding current / Duty cycle [10min/40°C]300A / 60%
Welding current / Duty cycle [10min/40°C]250A / 100%
Open-circuit voltage60 V
Degree of protectionIP23
747 mm
300 mm
497 mm
Weight26,45 kg


Would you like to find out more about the product?

High-power welding and a broad range of applications

40% duty cycle

Four minutes of continuous welding at maximum output power, in other words, one minute more of productive output compared with the average in this power range.

167 characteristics*

/ Steel, CrNi, AlMg, AlSi, Metal Cored, Rutil FCW, Basic FCW, Self-shielded
/ 0.8 – 1.6mm wire diameter
/ Eight different gas mixtures

Ready to weld in three steps

The intuitive operating concept enables welders to start work straight away – no prior knowledge of the device is required. All the essential welding parameters can be viewed and adjusted on the front panel. The only parameters that have to be selected before welding begins are the gas, wire diameter and material thickness.

70% less rework, 30% faster welding

The Pulse function of the TransSteel 4000 und TransSteel 5000 Pulse permits faster welding speeds on thicker materials. The pulsed arc also reduces the amount of rework, as less welding spatter is generated.

* Maximum number of characteristics (TransSteel 5000 Pulse), will vary depending on the version.

The MIG/MAG welding functions

Welding controlled and fast

The new TransSteel 4000 Pulse and TransSteel 5000 Pulse mark the arrival of the pulsed arc in the TransSteel series. Controlled welding in the intermediate arc range together with optimum weldability when working with aluminum are now part of the basic package.

Special 4-step mode
For a more stable arc

The “Special 4-step mode” is particularly suitable for welding in the higher power range. In special 4-step mode, welding starts at a lower power, which makes the arc easier to stabilize.

Seam rippling for aluminum alloys

The “SynchroPulse” option is recommended for the welding of aluminum alloys when a rippled seam appearance is required. This effect is achieved by modifying the welding power between two operating points.


SynchroPulse works in Standard Synergic and Pulse Synergic mode – but only on the TransSteel 4000 and 5000 Pulse.

Spot and Stitch welding
With no material distortion

Spot mode enables you to place welding spots at regular intervals. As you have complete flexibility over the pause time between the intervals, spot welding is ideal for the tacking of workpieces. Stitch welding not only produces a rippled seam appearance, the low level of heat input reduces any possible material distortion when working with light gage sheets.

Transfer technology

  • Steel is the universal characteristic for quick and easy welding applications.
  • Steel root is the characteristic specifically developed for root pass welding. It is characterized by particularly strong gap-bridging ability, in other words, the ability to fill wide gaps.
  • Steel dynamic is a characteristic with a particularly hard and concentrated arc, resulting in high welding speeds and deep penetration.


  • PCS (Pulse Controlled Spray Arc) characteristics* facilitate a combination of intermediate and spray arcs – the result is deep penetration with minimal spattering.

Corrections during welding

The arc length correction and arc-force dynamic welding parameters can be used to optimize the welding result.

Arc length correction
To change the arc characteristic

 shorter arc, reduced welding voltage
o neutral arc
+ longer arc, increased welding voltage

Arc-force dynamic
For influencing the short-circuiting dynamic at the instant of droplet transfer

 hard, stable arc
o neutral arc
+ soft, low-spatter arc

Pulse correction
For correcting the pulse energy of pulsed arc

Slower droplet detachment force
o neutral droplet detachment force
higher droplet detachment force

Welding data documentation

Welding data documentation is essential, particularly in steel construction. Load-bearing steel structures, mass-produced products or sensitive parts often have to be traceable down to the final welding parameters. The Easy Documentation option enables TransSteel* to record welding data extremely easily.
More information about easy documentation

USB thumb drive export function

A USB thumb drive can be connected to the rear of the device (the stick is included as part of the scope of supply with the Easy Documentation option). The drive can then be used to export a CSV file containing welding data.

Easy documentation recording of welding parameters

Easy Documentation records the following welding parameters:

/ Power source ID// Firmware version
/ Serial number// Process (Manual, Standard, Pulse, TIG, MMA)
/ Current / voltage / wire speed in the main process phase
/ Power from instantaneous values “IP” (Instantaneous Power) - energy / time (in the main process phase)
/ Energy from instantaneous values “IE” (Instantaneous Energy) over the entire welding operation
/ Motor current (in the main process phase)
/ Time stamp hh:mm:ss when current starts to flow
/ Counter
/ Welding duration
/ Error no. when welding is terminated
/ Wire speed (metric and imperial)
/ Characteristic number
/ Operating mode (2T, S2T, 4T, S4T, spot welding, stitch welding, SynchroPulse)
/ Signature for each weld seam number
/ Template for .csv file
/ Easy Job number

Welding torch with additional functions configurable


The patented interface

The patented Multilock interface allows you to configure the MIG/MAG welding torch* according to the task in hand. The wide choice of torch bodies in terms of their lengths and angles enables even difficult to access parts to be welded without any problem. In case of doubt, the best alternative is a flexible torch body.


* Standard and Up/Down welding torches.


Fronius System Connector

The Fronius System Connector (FSC) is the central connector for all media and enables a variety of different welding torches to be connected.

We think you are located in a different country

The country currently selected is Fronius International. Would you like to stay on this page or do you want to switch to the local website?