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Correction factors for common shielding gases
Correction fac- CF = correction factor (gas factor on the welding machine)
tors of the most
common shiel- Pure gases, air
ding gases
Gas
Argon (Ar)
Helium (He)
Carbon dioxide (CO
Air
NOTE!
The correction factor 1.72 for argon also applies to the OPT/i TIG plasma gas
regulator. All other correction factors are not applicable or are only conditio-
nally applicable for the OPT/i TIG plasma gas regulator.
Ar-He shielding gas mixtures
Gas
Ar + 15 % He
Ar + 20 % He
Ar + 25 % He
Ar + 30 % He
Ar + 50 % He
Ar + 70 % He
Ar + 90 % He
Ar-He-CO
Gas
Ar + 18 % He + 1 % CO
Ar + 20 % He + 2 % CO
Ar + 20‑30 % He +
2 % CO
Ar + 25 % He + 25 %
CO
42
)
2
shielding gas mixtures
2
2
2
2
2
Main group and
subgroup accord-
ing to EN ISO
14175
I1
I2
C1
Main group and
subgroup accord-
ing to EN ISO
14175
I3
I3
I3
I3
I3
I3
I3
Main group and
subgroup accord-
ing to EN ISO
14175 % Ar
M12
M12
M12
70.50
M21
% CF
100 % Ar 1.72
100 % He 11.82
100 % CO 1.00
2
100 % air 1.53
% Ar %He
85 15
80 20
75 25
70 30
50 50
30 70
10 90
% CO
%He
2
81 18 1
78 20 2
27.50 2
50 25 25
CF
1.97
2.07
2.19
2.31
3.00
4.28
7.45
CF
2.27
2.04
2.21
1.78