A hardenability comparison card built on the real ASTM A255 / ISO 642 Jominy end-quench test: a water jet sprays one end of a heated steel bar continuously, a directional quench front creeps up the bar, and hardness falls off with distance from that face along a curve that is each alloy's signature, drawn beside a real numeric table so the comparison never lives only in the picture.
pnpm dlx shadcn@latest add "https://design.helpmarq.com/r/jominy-quench.json"