How do you calculate annealing energy cost?

Multiply connected load by runtime and the electricity tariff, then divide by units annealed. With 12 kW for 8 hours at $0.12/kWh over 1000 units, energy cost is $11.52 total and $0.0115 per piece.

What does the per-unit annealing cost tell me?

It isolates the energy portion of the anneal step for each piece of wire, here about $0.0115, so you can add it cleanly to a per-piece cost stack alongside drawing and tooling.

Why is actual furnace energy lower than connected load suggests?

Furnaces cycle their heating elements to hold a setpoint rather than drawing full load continuously, so real kWh is usually below the 96 kWh the nameplate load implies for a full 8-hour run.

How do I lower annealing energy cost per unit?

Load the furnace more fully so the fixed energy spreads over more units, improve insulation to cut cycling, and avoid running the furnace warm between batches. Doubling the units to 2000 would halve the per-piece cost.

What is a typical electricity tariff to use?

Use your actual contracted or time-of-use rate; industrial tariffs often fall in the $0.08-$0.15/kWh range. The $0.12 default is a reasonable mid-range placeholder.

Annealing energy cost vs die cost: how do they compare?

Per piece, annealing energy here is about a cent while die cost can run dollars, so on hard-alloy jobs tooling usually dominates. On high-volume soft wire, energy and throughput matter more.

Wire Drawing & Rod Processing calculator

Annealing Energy Calculator

Annealing energy cost is the electricity spent softening drawn wire in a furnace, expressed both as a total and as a cost per annealed unit. Process engineers and energy managers in wire mills use it to price the anneal step into a job and to spot furnaces that are drifting toward inefficiency. Annealing is often the most energy-hungry step in a wire line, and a furnace left running under-loaded burns money without adding value. This calculator multiplies connected load, runtime, and tariff into an energy cost, then divides by the units processed so you can see exactly what softening each piece of wire costs.

What this calculator does

Annealing energy cost is the electricity spent softening drawn wire in a furnace, expressed both as a total and as a cost per annealed unit.
Use it when annealing energy in wire drawing and rod processing is being quoted and energy is a real chunk of the wire drawing and rod processing cost stack.
It multiplies furnace connected load by runtime and electricity tariff to get total energy cost, then divides by units annealed for a per-unit energy cost.

Formula used

Energy cost = connected load × runtime × energy rate
Annealing Energy energy per unit = energy cost ÷ processed units

Inputs explained

Annealing furnace connected load:
Furnace runtime:
Electricity tariff:
Wire units annealed:

How to use the result

Use it when costing the anneal step, comparing furnace loads, or building an energy budget for a wire order.
It uses connected load as if the furnace draws full power the whole time; furnaces cycle on and off around a setpoint, so actual consumption is usually lower than nameplate load implies.

Current U.S. benchmarks

As of Apr 2026, industrial electricity averages 8.7 cents per kWh across the U.S. (EIA), up 5.5% from a year earlier. State averages range widely, so plants should confirm against their own tariff.
The producer price index for copper and brass mill shapes stands at 559.593 (BLS, May 2026), up 76.8% from a year earlier. Quotes priced off last quarter's material cost miss this move. Global copper trades at $13,484 per tonne (IMF via FRED, May 2026).
The U.S. has 5,397 electrical equipment and appliances establishments employing about 369,437 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate annealing energy cost? Multiply connected load by runtime and the electricity tariff, then divide by units annealed. With 12 kW for 8 hours at $0.12/kWh over 1000 units, energy cost is $11.52 total and $0.0115 per piece.
What does the per-unit annealing cost tell me? It isolates the energy portion of the anneal step for each piece of wire, here about $0.0115, so you can add it cleanly to a per-piece cost stack alongside drawing and tooling.
Why is actual furnace energy lower than connected load suggests? Furnaces cycle their heating elements to hold a setpoint rather than drawing full load continuously, so real kWh is usually below the 96 kWh the nameplate load implies for a full 8-hour run.
How do I lower annealing energy cost per unit? Load the furnace more fully so the fixed energy spreads over more units, improve insulation to cut cycling, and avoid running the furnace warm between batches. Doubling the units to 2000 would halve the per-piece cost.
What is a typical electricity tariff to use? Use your actual contracted or time-of-use rate; industrial tariffs often fall in the $0.08-$0.15/kWh range. The $0.12 default is a reasonable mid-range placeholder.

Last reviewed 2026-05-12.