| Symbol | Componments In Percent Volume | Remarks | ||||||
| Group | No. | CO2 | O2 | Ar | He | H2 | N2 | |
| R | 1 2 |
Bal Bal |
0-15 15-35 |
Reducing | ||||
| I | 1 2 3 |
100 Bal |
100 0-95 |
Inert | ||||
| M1 | 1 2 3 4 |
0-5 0-5 0-5 |
0-3 0-3 |
Bal Bal Bal Bal |
0-5 |
Lightly Oxidation | | | More Oxidation |
||
| M2 | 1 2 3 4 |
5-25 0-5 5-25 |
3-10 3-10 0-8 |
Bal Bal Bal Bal |
||||
| M3 | 1 2 3 |
25-50 5-50 |
10-15 8-15 |
Bal Bal Bal |
||||
| C | 1 2 |
100 Bal |
0-30 |
Unreactive | ||||
| F | 1 2 |
0-5 |
100 Bal |
Reducing | ||||
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