ns-ui / jominy-quench

Which grade hardens harder, deeper

One face of each bar is water-quenched; hardness falls off with distance from that face along a curve unique to the alloy — the standard ASTM A255 Jominy end-quench test, run side by side.

Hardenability by grade — Rockwell C hardness at each distance from the quenched face
Grade1/16″2/16″4/16″6/16″8/16″12/16″1″1.5″2″
55 HRC50 HRC36 HRC28 HRC24 HRC22 HRC21 HRC20 HRC20 HRC
58 HRC55 HRC48 HRC42 HRC37 HRC32 HRC29 HRC26 HRC24 HRC
56 HRC55 HRC53 HRC51 HRC49 HRC46 HRC44 HRC41 HRC38 HRC
58 HRC56 HRC53 HRC50 HRC47 HRC43 HRC40 HRC36 HRC33 HRC

Hover or focus a grade to trace its curve.