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MST405DCG-AP Kemppi Master T 405DC Ready to Weld Air Cooled 400A TIG Welder Package - 400v, 3ph
  • MST405DCG-AP Kemppi Master T 405DC Ready to Weld Air Cooled 400A TIG Welder Package - 400v, 3ph
  • MST405DCG-AP Kemppi Master T 405DC Ready to Weld Air Cooled 400A TIG Welder Package - 400v, 3ph
  • MST405DCG-AP Kemppi Master T 405DC Ready to Weld Air Cooled 400A TIG Welder Package - 400v, 3ph
  • MST405DCG-AP Kemppi Master T 405DC Ready to Weld Air Cooled 400A TIG Welder Package - 400v, 3ph
  • MST405DCG-AP Kemppi Master T 405DC Ready to Weld Air Cooled 400A TIG Welder Package - 400v, 3ph
  • MST405DCG-AP Kemppi Master T 405DC Ready to Weld Air Cooled 400A TIG Welder Package - 400v, 3ph
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Rapid Ref : MST405DCG-AP  Mfr Ref : MST405DCG

Kemppi Master T 405DC Ready to Weld Air Cooled 400A TIG Welder Package - 400v, 3ph
MST405DCG MST405DCG-AP

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Professional’s number one choice for TIG welding

Master T sets the benchmark for weld quality, usability and energy efficiency in professional AC and DC TIG welding. Designed for welders that demand precision, Master T combines advanced welding performance with durability and ergonomics to excel in any application. Available in power variants up to 500 A, Master T delivers smooth and reliable arc ignition, reduced noise level and enhanced arc control, ensuring consistent, high-quality results from start to finish. Weld Assist technology speeds parameter setups, helping every welder establish benchmark settings by joint type, joint position and material thickness.

Product Details

Precision from start to finish

Smooth arc ignition allows great control, precision and efficiency. Weld Assist guides every user to faster weld parameter set-up, and lower noise levels help you maintain focus throughout your welding day.

Powerful performance

Value-based specifications combine powerful welding capability with additional performance features like Pulse, MicroTack and AutoCool technology, influencing improved welding control, quality, speed and energy efficiency. 

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Master T DC FAQs

Straight answers to the questions people ask most when choosing and using professional industrial DC TIG welding machines.

How do I choose the right current rating?icon-minus-redicon-plus-red

Look at the thickest material and the weld types you do, then choose a machine with some headroom above that. A machine working near its limit runs hotter and less efficiently than one with spare capacity.

Check the duty cycle at your working current. A high headline figure may only apply for a short proportion of each ten minutes, so consider how long your welds actually run without a break. Our team can help you compare if you describe your jobs.

When is a water-cooled torch necessary?icon-minus-redicon-plus-red

Gas-cooled torches suit shorter welds and moderate current. At higher currents, or in continuous or automated welding, the torch handle and head heat up faster than the gas can cool them, and it becomes uncomfortable and then damaging to the torch.

Water cooling carries heat away through a coolant circuit and a separate cooling unit. It also lets a torch be smaller and lighter for a given current. If your torch gets too hot to hold, or you must stop often to let it cool, move to water cooling.

How do I get a clean, bright weld on stainless steel?icon-minus-redicon-plus-red

Cleanliness is key. Degrease the joint, use clean stainless tools, and avoid tools that have been used on carbon steel. Control heat input and keep gas coverage steady, with a post-flow long enough to protect the cooling weld.

For pipe and tube you usually also need a purge of the inside, so the root side does not oxidise. A light straw colour is generally accepted, but heavy blue or grey indicates too much heat or poor shielding. Requirements are set by the job specification.

What are up-slope, down-slope and crater fill?icon-minus-redicon-plus-red

Up-slope raises the current gradually when you start so the puddle forms smoothly instead of a sudden burst. Down-slope lowers it gradually at the end, which helps prevent a crater, a hollow with a risk of cracking where the arc stops.

Crater fill or final current gives a low setting at the end of the weld to fill the crater. These controls matter on thicker work, stainless and anything that will be inspected. Use a pedal or torch control for the same effect by hand.

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