The negative leg of the type-K thermocouple in every workshop.
The strongest permanent magnet ever made — in every hard drive and earbud.
Melts in hot tea at 70 °C — the old fire-sprinkler trigger.
"SAC" — the three-metal solder that replaced tin–lead by law.
Springs, bearings and the bright strings on an acoustic guitar.
The four-metal casting recipe behind most public statues.
The castable aluminum of engine blocks and gearbox housings.
Liquid at room temperature — the thermometer filling that replaced mercury.
Light, bright, and burns ferociously in fireworks.
Shape-memory metal: bend it, warm it, and it springs back.
The riveted aircraft skin alloy — strong, and it fatigues gracefully.
The "flint" in a lighter: scrape it and it throws burning sparks.
Skillets, manhole covers and Victorian bridges.
Sculptors' casting metal and marine fasteners.
The all-purpose structural aluminum: extrusions, frames, boat hulls.
The Bronze Age's first recipe, before tin trade routes existed.
Cuts while glowing red without losing its edge — the original T1 drill-bit steel.
The 18/8 grade in your cutlery drawer — rust never gets a foothold.
The classic horseshoe magnet — and vintage guitar pickups. Its name lists three of four.
The feedstock every stainless steel mill buys by the shipload.
Twenty alloys, and for each one you name the chemical elements it's made from. Steel is iron and carbon. Brass is copper and zinc. Nitinol is nickel and titanium — the name is doing you a favour on that one.
This is the periodic table from the other direction: instead of recalling where an element sits, you work out which elements had to be melted together to make the metal in your hand. You get ONE attempt per alloy, and every recipe is graded together at the end of the run.
The bank holds 72 alloys and every run draws a fresh 20, weighted towards the ones you've actually heard of: ten common, six tricky, four specialist.