EXPOSED
The core loop — read the spec, set furnace temperature and cycle time, load and unload baskets, quench, test hardness, log the chart — is half physical handling and half parameter work that PLCs, recipe management software and closed-loop pyrometry already do better than a human eye. Loading heavy fixtures, hanging parts, breaking up jams, straightening warped stock and troubleshooting a furnace that isn't holding uniformity still needs a body on a hot shop floor, which is the main thing holding this job in place. The bigger threat isn't a language model, it's capital investment in automated batch lines and the long-run decline in domestic heat treat headcount.
Mixed — a routine tier and a judgment tier. Recipe entry, ramp-soak-quench cycles and hardness data logging are already handled by PLCs and AMS 2750 pyrometry systems that hold uniformity tighter than any operator's judgment, but the physical half — racking gears, hanging shafts, moving baskets from furnace to quench tank before the part cools out of range, clearing a jam in a mesh belt — is what puts this at 10 instead of the 4 a pure control-panel job would score.
Hands-on in uncontrolled environments. You work within feet of a 1700°F furnace door in leathers and a face shield, manhandle fixtures and hot baskets with tongs or a hoist, deal with quench oil fumes and salt bath splash, and chase temperature drift by physically checking thermocouples and burner tuning — uncontrolled enough to earn 14, but it's still a fixed shop floor with fixed equipment rather than a 17-18 field environment.
No licence, no signature requirement. No state licence gates this work; the certification that matters — Nadcap or AS9100 heat treat approval, AMS 2750 pyrometry compliance — attaches to the plant and its quality department, not to your name, and when a batch fails hardness testing the customer pursues the shop, so 2 rather than 0 only reflects the signed process charts you initial.
Anonymous artifact production. The parts leave with a certification packet and a hardness reading, not your name; a purchasing agent picks a heat treat vendor on Nadcap status, turnaround and price, and would not know whether you or the second-shift operator ran the load — the 3 is for the shop-floor relationship with your own engineers and inspectors, not with any customer.
Meaningful discretion. The spec sheet dictates temperature, soak time and quench medium, and deviations need engineering sign-off, so most shifts are procedure-following; the 7 covers the calls that are genuinely yours — deciding a furnace isn't holding uniformity and stopping production, judging whether warped stock is salvageable by straightening, adjusting for load density or a part that came in with unexpected prior condition.
Machinists EXPOSED
Maintenance Workers, Machinery EXPOSED
Has AI actually changed your work?