Heat Treatment, Furnaces & Thermal Processing calculator
Soak Time Calculator Calculator
Estimate required soak planning time from section thickness or load basis, soak rate, and allowance. It helps planners reserve furnace time, labor, fixtures, and downstream inspection capacity before the load is released.
What this calculator does
- Estimate required soak planning time from section thickness or load basis, soak rate, and allowance.
- Use it when heat treat recipes need a quick planning check for soak time at temperature before release.
- Estimates soak time using a simplified thickness or load basis and allowance.
Formula used
- Base soak hours = soak basis thickness or load units ÷ soak rate
- Required soak time = base soak hours × allowance factor
Inputs explained
- Soak basis thickness or load units: Use the planned workload from the traveler, work order, recipe, or test plan.
- Soak rate: Use a proven rate from recent thermal processing history, not the best possible rate.
- Soak planning allowance: Include expected setup, loading, ramp, transfer, inspection, queue, or minor delay allowance.
How to use the result
- Use it for early scheduling, quote checks, or sanity checks against an approved recipe.
- It does not replace the metallurgical recipe. Final soak depends on alloy, section size, furnace uniformity, load density, and specification requirements.
Common questions
- What is the soak time calculator calculator for? It estimates planning soak time for a heat treat load.
- What numbers should I enter? Use the thickness or load basis specified by your planning method, a soak rate, and allowance.
- How should I use the result? Use the result to check whether the scheduled cycle has enough time at temperature.
- When is this only an estimate? It is only an estimate when alloy, section thickness, furnace class, or specification rules require a different soak practice.
Last reviewed 2026-05-12.