Foundry & Forging worked example

Forge Heating Time at 13% heating and transfer allowance: a worked example

This worked example runs the forge heating time numbers for a tougher week than the baseline: 13% heating and transfer allowance instead of the typical 18%. Estimate heating time workload for billets, bars, slugs, or preforms before forging.

The inputs for this scenario

  • Billets or forge loads to heat: 40 loads (held at the documented default)
  • Heating completion rate: 7 loads / hr (held at the documented default)
  • Heating and transfer allowance: 13 % (the input this scenario stresses; the baseline uses 18)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base forge heating time = billets or forge loads to heat รท heating completion rate.
  • Required forge heating time works out to 6.46 hr at these inputs, and this is the headline figure for the scenario.
  • Base forge heating time works out to 5.71 hr at these inputs.
  • Heating and transfer allowance works out to 13 % at these inputs.
  • Heating completion rate works out to 7 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where heating and transfer allowance sits at 18% and the headline result is 6.74 hr, this scenario comes in 4.24% below the baseline at 6.46 hr.
  • Use it when planning a forging run, sizing furnace capacity against press demand, or quoting lead time for a heat-and-forge job. 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 forge heating time: 6.46 hr (headline result)
  • Base forge heating time: 5.71 hr
  • Heating and transfer allowance: 13 %
  • Heating completion rate: 7 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Forge Heating Time calculator, set heating and transfer allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.