If Hardox® and Strenx® grades are welded to other types of steel the same gas types may be applied.

Welding method Arc type Position Shielding gas [weight %]
 MAG, solid wire  Short arc  All positions  18-25% CO2, rest Ar
 MAG, cored wire  Short arc  All positions  18-25% CO2, rest Ar
 MAG, solid wire  Spray arc  Horizontal (PA, PB, PC)  15-20% CO2, rest Ar
 MAG, MCAW  Spray arc  All positions  15-20% CO2, rest Ar
 MAG, MCAW  Spray arc  Horizontal (PA, PB, PC)  15-20% CO2, rest Ar
 Robotic and automatic MAG  Spray arc  Horizontal (PA, PB, PC)   8-18% CO2, rest Ar
 TIG  Spray arc  All positions  100% Ar

Suggestions of different gas mixtures for welding the Hardox® and Strenx® grades.

Note that shielding gases other can also be used. The consumable manufacturer can also specify a certain shielding gas composition for a specific consumable. In such a case, the recommendations for the consumable should be applied.

Gas flow

Gas flow can be optimized in order to get a well-balanced welding performance. Too little gas flow results in inadequate protection of the melt. Excessive gas flow can become turbulent thus deteriorating the gas protection.

The gas flow for all welding methods based on shielding gases, as a rule of thumb, can be set by using the same number of the gas flow measured in l/min as the inner diameter of the nozzle measured in mm.