How many Amps per mm do I need to weld in Tig mode in direct current (DC)?

Use on: common carbon steel (commonly called "iron"), stainless steel, copper and its alloys, silver, titanium and its alloys.

Piece thickness (mm) 0,4 Current (A) 5-15
Piece thickness (mm) 0,6 Current (A) 10-30
Workpiece thickness (mm) 0,8 Current (A) 20-40
Piece thickness (mm) 1,0 Current (A) 30-60
Piece thickness (mm) 1,5 Current (A) 40-80
Piece thickness (mm) 2,0 Current (A) 70-100
Workpiece thickness (mm) 3.0 Current (A) 80-120
Piece thickness (mm) 4.0 Current (A) 100-150
Workpiece thickness (mm) 5.0 Current (A) 150-260
Workpiece thickness (mm) over 5.0 Current (A) 250-300
The following is the list indicating the diameter of the tungsten electrode to be used depending on the current chosen:

Electrode diameter (mm) 1.0 Direct current (A) 10-75
Electrode diameter (mm) 1.6 Direct current (A) 40-120
Electrode diameter (mm) 2.0 Direct current (A) 100-200
Electrode diameter (mm) 2,4 Direct current (A) 170-250
Electrode diameter (mm) 3.2 Direct current (A) 225-330
Electrode diameter (mm) 4.0 Direct current (A) 300-480