Heat Treatment, Furnaces & Thermal Processing worked example

Carburizing Cycle Time at 8.64% carburizing cycle allowance: a worked example

Suppose carburizing cycle allowance falls to 8.64%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate carburizing cycle planning time from planned loads, load completion rate, and allowance for boost, diffuse, quench, and handling delays.

The inputs for this scenario

  • Carburizing loads planned: 2 loads (held at the documented default)
  • Carburizing completion rate: 0.08 loads / hr (held at the documented default)
  • Carburizing cycle allowance: 8.64 % (the input this scenario stresses; the baseline uses 12)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base carburizing hours = carburizing loads planned รท carburizing completion rate.
  • Required carburizing cycle time works out to 27.16 hr at these inputs, and this is the headline figure for the scenario.
  • Base carburizing hours works out to 25 hr at these inputs.
  • Carburizing allowance applied works out to 8.64 % at these inputs.
  • Carburizing completion rate works out to 0.08 loads / hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where carburizing cycle allowance sits at 12% and the headline result is 28 hr, this scenario comes in 3% below the baseline at 27.16 hr.
  • It computes total carburizing cycle hours by dividing planned loads by the furnace completion rate and applying a cycle allowance factor. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Required carburizing cycle time: 27.16 hr (headline result)
  • Base carburizing hours: 25 hr
  • Carburizing allowance applied: 8.64 %
  • Carburizing completion rate: 0.08 loads / hr

Run it with your numbers

  • To rerun this with your own numbers, open the live Carburizing Cycle Time calculator, set carburizing cycle allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.