Carbon Potential Calculator

Calculate atmosphere carbon potential from measured gas compositions, determine gas mixing ratios for endogas and N₂/methanol systems, and set correct Cp targets for your process.

Atmosphere Carbon Potential Calculator
Temperature (°C)
900
%CO in atmosphere
20.5
%CO₂ in atmosphere
0.38
%CH₄ in atmosphere
0.5
Calculated Carbon Potential — % C
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Calculations Available

  • Carbon potential from CO/CO₂/CH₄ (Boudouard equilibrium method)
  • Dew point to Cp conversion for N₂/methanol systems
  • Oxygen probe mV to Cp (Type S reference electrode)
  • Endogas composition from natural gas ratio
  • N₂ + methanol gas mixing ratios for target Cp
  • Harris equation and alternate Cp calculation methods

Atmosphere Systems Supported

  • Endothermic gas (endogas) from natural gas or propane
  • Nitrogen + methanol (N₂/MeOH) injection systems
  • Nitrogen + propane direct enrichment
  • Ammonia cracked (HNX) for bright annealing
  • Synthetic atmosphere blending systems
  • Vacuum partial pressure (Ar/N₂ backfill)

Carbon Potential Control in Industrial Carburising

Accurate carbon potential control is essential for producing consistent case depths in gas carburising and carbonitriding processes. Too high a Cp leads to surface carbide networks and poor toughness; too low produces insufficient case depth and soft surfaces.

The carbon potential is related to the equilibrium between the gas atmosphere and the steel surface at temperature. Our calculator uses established thermodynamic relationships to convert measured gas compositions (CO, CO₂, CH₄ from an IR gas analyser) or dew point readings into carbon potential in wt% carbon.

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