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Correction factors for common shielding gases
Gas
Helium (He)
Argon (Ar)
Carbon dioxide (CO
Air
Corgon 18
Corgon 5
Corgon 8
Corgon 15
Corgon 20
Corgon 25
Corgon He 25 C
M12 Ar+2%CO
2
Cornigon 2
Varigon He 50
M13(1) Ar+He
Cornigon He 20
Arcal 121 Ar68He30CO
I3 Ar+15%He
I3 Ar+25%He
I3 Ar+30%He
Mixture
Varigon He
C1 100% CO
2
I1 100% Ar
I3 Ar+30%He
I3 Ar+50%He
M12 Ar+20‑30%He+
2%CO
2
M12 Ar+2.5%CO
2
M12 Ar+30%He+0.5%CO
M12 Ar+30%He+2%CO
M12 Ar+30%He+2.5%CO
M12 Ar+33%He+1%CO
52
Designa-
He
tion as per
DIN EN
439
M13
100%
I1
)
C1
2
M21
M21
M21(1)
25%
M12
50%
M13(1)
30%
M12(1)
20%
22
M12(1)
30%
2
I3
15%
I3
25%
R2
30%
M12(1)
20%
I3
90%
30%
50%
27.5
30%
2
30%
2
30%
2
33%
2
Ar
CO
2
100%
100%
82%
18%
95%
5%
92%
8%
85%
15%
80%
20%
75%
25%
50%
25%
98%
2%
97.5%
2.5%
50%
70%
78%
2%
68%
2%
85%
75%
70%
80%
10%
100%
100%
70%
50%
70.5%
2%
%
97.5%
2.5%
69.5%
0.5%
68%
2%
67.5%
2.5%
66%
1%
Air
O
H
Correction fac-
2
2
100%
tor
11.821
1.720
1.000
1.525
1.523
1.660
1.626
1.552
1.503
1.458
1.780
1.695
1.689
3.003
2.313
2.039
2.269
1.973
2.187
2.313
2.074
7.447
1.000
1.720
2.313
3.003
2.207
1.689
2.302
2.269
2.258
2.372
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