Foundry & Forging worked example

Melt Chemistry Adjustment at 61% expected element recovery factor: a worked example

This worked example runs the melt chemistry adjustment numbers for a tougher week than the baseline: 61% expected element recovery factor instead of the typical 85%. Estimate an adjusted melt chemistry addition or trim target from a baseline and correction factor.

The inputs for this scenario

  • Baseline alloy addition: 42 lb (held at the documented default)
  • Chemistry correction amount: 6 lb (held at the documented default)
  • Expected element recovery factor: 61 % (the input this scenario stresses; the baseline uses 85)

Working through the calculation

  • The calculation starts from the formula this tool documents: Adjusted melt chemistry adjustment = (baseline chemistry addition + chemistry correction amount) × expected recovery or adjustment factor.
  • Adjusted melt chemistry addition works out to 252 units at these inputs, and this is the headline figure for the scenario.
  • Gap to target works out to 191 value at these inputs.
  • Measured value works out to 42 value at these inputs.
  • Correction factor works out to 6 x at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where expected element recovery factor sits at 85% and the headline result is 252 units, this scenario lands almost exactly on the baseline at 252 units.
  • Use it on the melt deck when planning a charge or making a mid-heat trim after a spectrometer reading shows you are off aim. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Adjusted melt chemistry addition: 252 units (headline result)
  • Gap to target: 191 value
  • Measured value: 42 value
  • Correction factor: 6 x

Run it with your numbers

  • To rerun this with your own numbers, open the live Melt Chemistry Adjustment calculator, set expected element recovery factor to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.