Metals, Steel, Aluminum & Coil Processing worked example

Annealing Load at 61% furnace utilization target: a worked example

Suppose furnace utilization target falls to 61%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Size the annealing load by dividing the coils to anneal by your utilization target, then compare the required load against furnace capacity to spot overload.

The inputs for this scenario

  • Coils to anneal: 40 coils (held at the documented default)
  • Furnace base capacity: 48 coils (held at the documented default)
  • Furnace utilization target: 61 % (the input this scenario stresses; the baseline uses 85)

Working through the calculation

  • The calculation starts from the formula this tool documents: Required anneal load = coils to anneal รท utilization target.
  • Total load works out to 1,920 coils at these inputs, and this is the headline figure for the scenario.
  • Hourly equivalent works out to 31.48 coils / hr at these inputs.
  • Input load works out to 40 coils at these inputs.
  • Load factor works out to 48 x at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where furnace utilization target sits at 85% and the headline result is 1,920 coils, this scenario lands almost exactly on the baseline at 1,920 coils.
  • It computes the required anneal load by dividing coils to process by the utilization target, then compares that to furnace capacity to expose any gap. 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

  • Total load: 1,920 coils (headline result)
  • Hourly equivalent: 31.48 coils / hr
  • Input load: 40 coils
  • Load factor: 48 x

Run it with your numbers

  • To rerun this with your own numbers, open the live Annealing Load calculator, set furnace utilization target to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.