Heat Treatment, Furnaces & Thermal Processing worked example

Annealing Cycle Time at 11% annealing schedule allowance: a worked example

This worked example runs the annealing cycle time numbers for a tougher week than the baseline: 11% annealing schedule allowance instead of the typical 15%. Estimate annealing cycle time from load count or batch weight, proven annealing rate, and allowance for ramp, soak, handling, and delay.

The inputs for this scenario

  • Annealing workload: 3 loads (held at the documented default)
  • Annealing completion rate: 0.33 loads / hr (held at the documented default)
  • Annealing schedule allowance: 11 % (the input this scenario stresses; the baseline uses 15)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base annealing hours = annealing workload รท annealing completion rate.
  • Required annealing cycle time works out to 10.09 hr at these inputs, and this is the headline figure for the scenario.
  • Base annealing hours works out to 9.09 hr at these inputs.
  • Annealing allowance applied works out to 11 % at these inputs.
  • Annealing completion rate works out to 0.33 loads / hr at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where annealing schedule allowance sits at 15% and the headline result is 10.45 hr, this scenario comes in 3.48% below the baseline at 10.09 hr.
  • Use it when scheduling batch annealing furnace runs, committing a heat treat lead time, or checking whether a job fits before the next ship cut. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Required annealing cycle time: 10.09 hr (headline result)
  • Base annealing hours: 9.09 hr
  • Annealing allowance applied: 11 %
  • Annealing completion rate: 0.33 loads / hr

Run it with your numbers

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

Last reviewed 2026-05-12.