AISI 1045 Steel

Steel name: AISI 1045
Diagram No.: 5001
Type of diagram: TTT
Mat. No (Wr.Nr) designation: 1.1191
SS designation: SS 1672
AFNOR designation: AFNOR XC 42 TS
AISI/SAE designation: AISI 1045
JIS designation: JIS S 45C
Chemical composition in weight %: 0.43-0.50% C, 0.60-0.90% Mn, max. 0.04% P, max. 0.05% S
Steel group: Carbon steels
Note: Time-temperature-transformation diagram of an unalloyed steel containing 0.45% C. Austenitization temperature, 880 C (1620 F). The temperature A1 is where transformation to austenite begins, and temperature A3 is where the transformation to austenite is complete.
Reference: G.E. Totten, M. Narazaki, R.R. Blackwood and L.M. Jarvis, Failures Related to Heat Treating Operation, from ASM Handbook Volume 11, Failure Analysis and Prevention (ASM International), 2002, pp. 191-193.

Transformation Diagram

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