Catalogued

CCT (continuous cooling transformation) diagram

Made by: Developed from Erich Scheil's additivity rule; no single originator
Year: 1935-1940s
Field: Engineering
Kind: Computing chart
Room: Charts that compute — Placed by reading its description, not yet studied

Skeleton drawing, not the original plate

14 other forms share this skeleton

Source

Attribution less certain: contested, or no single inventor recorded