How do you calculate sinter furnace capacity?

Multiply parts loaded per cycle by the number of available cycles to get gross capacity, then multiply by uptime and yield. With 4 units/cycle, 480 cycles, 90% uptime and 97% yield you get 1,920 gross and 1,676 good units.

What is the difference between gross and good furnace capacity?

Gross capacity (1,920 units here) is what the furnace could produce if it never stopped and every part passed. Good capacity (1,676 units) is what survives after uptime losses of 192 units and yield losses of about 52 units.

What is a good uptime for a sintering furnace?

Continuous belt sinter furnaces in mature PM shops typically run 88-95% scheduled uptime. The 90% used here is realistic; below about 85% you are usually losing cycles to atmosphere or heating-element issues that warrant a maintenance review.

Why is post-sinter yield lower than green yield?

Sintering introduces its own defects: dimensional drift outside tolerance, blistering, sooting, decarburization, and cracks from too-fast heat-up. A 97% post-sinter yield means 3% of dimensionally good green parts still get scrapped after the furnace.

How can I increase good furnace output without buying a second furnace?

Attack the two loss buckets first. Recovering 3 points of uptime here adds roughly 58 good units, and lifting yield from 97% to 99% adds about 35 units, often cheaper than the capital of a new sinter line.

Does parts per cycle change with part geometry?

Yes. Loading density depends on tray or belt footprint, part height, and required spacing for atmosphere flow. Tall or thin-walled parts pack fewer per cycle, so re-measure this input whenever the part mix changes.

Powder Metallurgy & Sintered Parts calculator

Sinter Furnace Capacity Calculator

Sinter furnace capacity tells a powder metallurgy plant how many good, dimensionally sound parts a belt or batch furnace can actually deliver over a planning period, not just how many it can theoretically hold. It is the number production planners and PM press-shop supervisors rely on to promise delivery dates, size a second furnace, or decide whether to run a third shift. The metric matters because sintering is almost always the bottleneck in a PM line: it is slow, energy-intensive, and every cycle you lose to a burner trip, atmosphere upset, or blistered load is capacity you can never recover. Separating gross furnace capacity from the uptime and yield haircuts shows exactly where output is leaking.

What this calculator does

Sinter furnace capacity tells a powder metallurgy plant how many good, dimensionally sound parts a belt or batch furnace can actually deliver over a planning period, not just how many it can theoretically hold.
Use it when sinter furnace capacity in powder metallurgy and sintered parts is being asked to take on more work and you need to know if there is room.
It computes net good sintered-part capacity by multiplying parts per cycle by available cycles, then derating for furnace uptime and post-sinter yield.

Formula used

Gross sinter furnace capacity capacity = units per cycle × available cycles
Good capacity = gross capacity × uptime × yield

Inputs explained

Green parts loaded per furnace cycle:
Available sinter cycles in the period:
Furnace uptime (scheduled availability):
Post-sinter yield (good parts after inspection):

How to use the result

Use it when quoting delivery volumes, evaluating whether one furnace can carry a new part number, or building a capacity case for a second sinter line.
It treats parts per cycle as a fixed number, but real belt furnaces vary loading density by part geometry and green density, so mixed-part schedules will read differently than a single-part run.

Current U.S. benchmarks

The producer price index for steel mill products stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. Quotes priced off last quarter's material cost miss this move.
U.S. iron and steel imports ran $2.1B in May 2026 (Census International Trade). The U.S. ran a trade deficit of $0.4B in the category that month. Import volumes are the pressure gauge behind tariff and reshoring decisions.

Common questions

How do you calculate sinter furnace capacity? Multiply parts loaded per cycle by the number of available cycles to get gross capacity, then multiply by uptime and yield. With 4 units/cycle, 480 cycles, 90% uptime and 97% yield you get 1,920 gross and 1,676 good units.
What is the difference between gross and good furnace capacity? Gross capacity (1,920 units here) is what the furnace could produce if it never stopped and every part passed. Good capacity (1,676 units) is what survives after uptime losses of 192 units and yield losses of about 52 units.
What is a good uptime for a sintering furnace? Continuous belt sinter furnaces in mature PM shops typically run 88-95% scheduled uptime. The 90% used here is realistic; below about 85% you are usually losing cycles to atmosphere or heating-element issues that warrant a maintenance review.
Why is post-sinter yield lower than green yield? Sintering introduces its own defects: dimensional drift outside tolerance, blistering, sooting, decarburization, and cracks from too-fast heat-up. A 97% post-sinter yield means 3% of dimensionally good green parts still get scrapped after the furnace.
How can I increase good furnace output without buying a second furnace? Attack the two loss buckets first. Recovering 3 points of uptime here adds roughly 58 good units, and lifting yield from 97% to 99% adds about 35 units, often cheaper than the capital of a new sinter line.

Last reviewed 2026-05-12.