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Gases for Plasma Cutting

Gases have a decisive influence on the cutting quality. Depending on the material to be cut, certain gases or gas combinations are used. Every gas has its specificproperties which can be used for cutting materials with different degrees of toughness. The following overview shows the gases that are typically used at Kjellberg Finsterwalde for each material type. Furthermore, it is necessary to define and distinguish the different  gas types like plasma gas, swirl gas or ignition gas from one another.

Gases for Cutting Different Types of Materials

Material
Plasma gas
Swirl gas
 
Mild steel
O2
O2, Air, N2
  • Laser-like rectangularity of the cut surface
  • Smooth and dross-free surface
Stainless steel
N2/H2
N2
  • For thin stainless steel (CrNi) from 1 mm to 6 mm


Ar/H2
N2
  • Good rectangularity of the cut surface
  • Smooth and dross-free surface
Aluminium
Air
N2
  • For thin aluminium from 1 mm to 8 mm
 
N2/H2
N2
  • For thin aluminium from 1 mm to 8 mm
 
Ar/H2
N2
  • Nearly vertical cuts


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