International competence in welding

Inert gases in accordance with DIN EN ISO 14175

Inert gases in accordance with DIN EN ISO 14175

Abbreviated name Components in volume percentages
Group Code oxidizing inert reducing inert
CO2 O2 Ar He H2 N2
R 1     Residual gas   > 0 – 15  
2     Residual gas    > 15 – 35  
I 1     100      
2       100    
3     Residual gas > 0 – 95    
M1 1 > 0 – 5   Residual gas   > 0 – 5  
2 > 0 – 5   Residual gas      
3   0 – 3 Residual gas      
4 > 0 – 5 0 – 3 Residual gas      
M2 0 > 5 – 15   Residual gas      
1 15  – 25   Residual gas      
2   > 3 – 10 Residual gas      
3 0,5 – 5 3 – 10 Residual gas      
5 5 – 15 3 – 10 Residual gas      
M3 1 25 – 50   Residual gas      
2   > 10 – 15 Residual gas      
3 25 – 50 2 – 10 Residual gas      
4 5 – 25 10 – 15 Residual gas      
5 25 – 50 10 – 15 Residual gas      
C 1 100          
2 Rest 0,5 – 30        
R 1     Residual gas   0 – 5  
2     Residual gas   15 – 50  
N 1           100
3     Residual gas     5 – 50
4     Residual gas   0,5 – 10 0,5 – 5
5         0,5 – 50 Residual gas
O 1   100        

 

Group Usual application Notes
R TIG; plasma welding; plasma cutting; root protection reducing
I MIG; TIG; plasma welding; root protection inert
M1 MAG weak oxidizing
M2 MAG oxidizing
M3 MAG oxidizing
C MAG strong oxidizing
R MIG; TIG  
N Plasma cutting; root protection inert, reducing
O Oxy-fuel welding  
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