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BOSS TIG 160HF
、
200HF Operating Manual
6.0 BASIC TIG WELDING GUIDE
6.01 Electrode Polarity
Connect the TIG torch to the - / torch terminal and the work lead to the + / work terminal for direct current
straight polarity. Direct current straight polarity is the most widely used polarity for DC TIG welding. It allows
limited wear of the electrode since 70% of the heat is concentrated at the work piece.
6.02 Tungsten Electrode Current Ranges
Electrode Diameter (mm)
DC current (A)
1.0
30— 60
1.6
60— 115
2.4
100— 165
3.2
135— 200
4.0
190— 280
4.8
250— 340
Table 9 Current ranges for varies tungsten electrode sizes
6.03 Tungsten Electrode Types
Tungsten type
(Ground finish)
Welding Application
Features
Color
code
Thoriated 2%
DC welding of mild steel, stainless
steel and copper
Excellent arc starting, Long life, high
current carrying capacity
Red
Ceriated 2%
DC welding of mild steel, stainless
steel, copper, aluminium, magnesium
and their alloys
Longer Life, More stable arc, Easier
starting,
Wider current range,
Narrower more concentrated arc
Grey
Table 10 Tungsten electrode types
6.04 Guide for Selecting Filler Wire Diameter
Filler wire diameter
DC current range (Amps)
1.6
20— 90
2.4
65— 115
3.2
100— 165
4.8
200— 350
Table 11 Filler wire selection guide
Notice
：
The filler wire diameter specified in Table 11 is a guide only, other diameter wires may be used
according to the welding application.
