Foundry & Forging worked example

Heat Treat Load at 21% heat-treat handling allowance: a worked example in foundry & forging

This scenario runs the heat treat load calculation on the strong side: 21% heat-treat handling allowance, with every other input held at its documented default. Use it when normalizing, annealing, quenching, tempering, stress relieving, aging, or solution heat treatment must fit furnace capacity and delivery dates.

The inputs for this scenario

  • Heat-treat pieces or baskets: 12 loads (unchanged)
  • Heat-treat completion rate: 1.5 loads / hr (unchanged)
  • Heat-treat handling allowance: 21 % (raised for this scenario; the documented default is 18)

Working through the calculation

  • Applying the documented formula (Base heat treat load = heat-treat pieces or baskets รท heat-treat completion rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 9.68 hr for required heat treat load, the number this scenario is built around.
  • At this operating point the engine returns 8 hr for base heat treat load.
  • At this operating point the engine returns 21 % for heat-treat handling allowance.
  • At this operating point the engine returns 1.5 pieces / min for heat-treat completion rate.

How this compares with the baseline

  • Against the tool's baseline example, where heat-treat handling allowance sits at 18% and the headline result is 9.44 hr, this scenario comes in 2.54% above the baseline at 9.68 hr.
  • Use it when scheduling furnace time, sequencing heat-treat jobs against a bottleneck, or quoting lead time for a batch. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Required heat treat load: 9.68 hr (headline result)
  • Base heat treat load: 8 hr
  • Heat-treat handling allowance: 21 %
  • Heat-treat completion rate: 1.5 pieces / min

Run it with your numbers

  • Every input above is editable in the live Heat Treat Load calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.