The Ac1 Range in S.A.E. 2335 Steel
THIS paper presents evidence that in 3½% nickel steel, the published temperature for the Ac1 transformation, l,275°F., represents the completion of that transformation, and that its inception occurs approximately 275°F. lower, at about l,000°F. The formation of austenite within this range, especially at the higher temperatures, and its subsequent decomposition to martensite, results in considerable impairment of the properties of the steel.
austenite, Martensite, nickel, Pittsburgh Crucible Steel Company, solid solution, Canadian, Carbon, formation, nickel, Phase, steel, Steels, Structure, Temperature