Heat Treatment, Furnaces & Thermal Processing calculator
Remaining Soak Time Calculator
Find the qualified hold still required by an approved heat-treatment recipe. Enter the required duration, qualified elapsed hold and maximum approved hold.
What this calculator does
- Check the remaining qualified hold against the approved minimum and maximum soak durations.
Formula used
- Remaining hold = maximum(required hold − qualified elapsed hold, 0)
- Projected total hold = maximum(required hold, qualified elapsed hold)
- Maximum hold margin = maximum approved hold − projected total hold
Inputs explained
- Required Qualified Hold: Minimum hold from the approved recipe for this load.
- Qualified Hold Already Elapsed: Logged hold after the approved load temperature condition was met.
- Maximum Approved Hold: Maximum cumulative qualified hold permitted by the recipe.
How to use the result
- Best suited to active soak countdown checks, excess hold reviews.
- Does not derive hold duration from thickness or alloy. Interrupted holds follow the governing recipe, not automatic time addition.
Current U.S. benchmarks
- Industrial electricity averages 9.77 cents per kWh across the U.S. (EIA, Jul 2026), up 4.7% from a year earlier. Energy-intensive steps carry this directly into unit cost.
Common questions
- When can I start counting elapsed hold? Count from the moment the load meets the approved temperature condition. The furnace controller reaching setpoint alone may be insufficient.
- Can I add time before and after an interruption? Only if the governing recipe permits cumulative holds. Otherwise enter the qualified interval determined by that instruction.
- Does zero remaining hold release the load? No. It only confirms elapsed time against the entered minimum. Apply the full process and inspection requirements.
- Can thickness determine the required hold here? No. Obtain the required duration from the approved material and process recipe for the actual load configuration.
Last reviewed 2026-10-06.