Metals, Steel, Aluminum & Coil Processing worked example
Rolling Mill Throughput at 99% mill efficiency: a worked example
This scenario runs the rolling mill throughput calculation on the strong side: 99% mill efficiency, with every other input held at its documented default. Use it when a production planner is committing rolling mill output and needs a defensible tons per hour figure.
The inputs for this scenario
- Tons rolled: 600 tons (unchanged)
- Mill run time: 8 hr (unchanged)
- Mill efficiency: 99 % (raised for this scenario; the documented default is 90)
Working through the calculation
- Applying the documented formula (Rolling throughput = tons rolled รท run time) to the inputs above produces each figure below.
- At this operating point the engine returns 74.25 tons/hr for effective tons per hour, the number this scenario is built around.
- At this operating point the engine returns 75 tons/hr for raw throughput.
- At this operating point the engine returns 99 % for mill efficiency.
- At this operating point the engine returns 8 hr for run time.
How this compares with the baseline
- Against the tool's baseline example, where mill efficiency sits at 90% and the headline result is 67.5 tons/hr, this scenario comes in 10% above the baseline at 74.25 tons/hr.
- Use it when setting shift production targets or benchmarking a mill's effective rate against its raw capability. 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
- Effective tons per hour: 74.25 tons/hr (headline result)
- Raw throughput: 75 tons/hr
- Mill efficiency: 99 %
- Run time: 8 hr
Run it with your numbers
- Every input above is editable in the live Rolling Mill Throughput calculator, which recalculates instantly and can be shared with the inputs intact.
Last reviewed 2026-05-12.