How long does a part take to reach cure temperature?

Rise over rate, padded for mass: a 330 °F climb at 30 °F per minute is 11 minutes, 12.1 with a 10% allowance. Datalog the thickest section; geometry and airflow move the rate too much to guess.

Why does part heat-up matter for cure?

The TDS hold counts only time at metal temperature. A 12-minute climb inside a 20-minute dwell leaves 8 minutes of cure against a 10-minute schedule: under-cured, while the oven air read perfect.

What heating rate should I expect?

Light sheet in a well-circulated convection oven commonly climbs 25 to 40 °F per minute; castings and thick weldments run 5 to 15. The rate belongs to the mass, geometry and airflow together, so measure per family.

Where does this page's answer go next?

Into the dwell page, as the heat-up that comes off transit time, and the oven capacity page, inside the required minutes that set the speed ceiling. Measure the rate once and the chain inherits it.

Finishing calculator

Part Heat-Up Time Calculator

Time the metal, because that is the clock the cure runs on. Enter the temperature rise, a datalogged heating rate, a mass allowance and the TDS hold.

What this calculator does

Minutes for a part's metal to reach cure temperature, plus the TDS hold, and the heat-up share of oven time.

Formula used

Base heat-up = metal temperature rise ÷ part heating rate
Part heat-up = base heat-up × (1 + mass allowance)
Total oven time needed = part heat-up + TDS hold
Heat-up share = part heat-up ÷ total oven time × 100

Inputs explained

Part Metal Temperature Rise Required: Cure temperature minus the part's starting metal temperature.
Part Heating Rate in the Oven: Datalogged metal climb rate for the governing thick section.
Part Mass Allowance: Padding for the thickest section and the flattening final degrees.
TDS Hold at Metal Temperature: TDS time at metal temperature once the climb finishes.

How to use the result

Best suited to feeding required minutes to the dwell pages, explaining why castings slow a line, checking winter dock-cold parts at line speed.
A lumped linear rate stands in for an exponential approach; datalogging is truth. Radiant ovens heat surfaces faster; a convection rate does not transfer. Dense racking heats slower than the lone test part did.

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.
The producer price index for industrial chemicals stands at 336.006 (BLS, Aug 2026), up 13.3% from a year earlier. Quotes priced off last quarter's material cost miss this move.
The U.S. has 14,543 chemical manufacturing establishments employing about 911,245 workers (Census County Business Patterns, 2023).

Common questions

How long does a part take to reach cure temperature? Rise over rate, padded for mass: a 330 °F climb at 30 °F per minute is 11 minutes, 12.1 with a 10% allowance. Datalog the thickest section; geometry and airflow move the rate too much to guess.
Why does part heat-up matter for cure? The TDS hold counts only time at metal temperature. A 12-minute climb inside a 20-minute dwell leaves 8 minutes of cure against a 10-minute schedule: under-cured, while the oven air read perfect.
What heating rate should I expect? Light sheet in a well-circulated convection oven commonly climbs 25 to 40 °F per minute; castings and thick weldments run 5 to 15. The rate belongs to the mass, geometry and airflow together, so measure per family.
Where does this page's answer go next? Into the dwell page, as the heat-up that comes off transit time, and the oven capacity page, inside the required minutes that set the speed ceiling. Measure the rate once and the chain inherits it.

Last reviewed 2026-10-01.