AISI 4140 Steel

Steel name: AISI 4140
Diagram No.: 5140
Type of diagram: TTT
AISI/SAE designation: 4140
Chemical composition in weight %: 0.37% C, 0.77% Mn, 0.98% Cr, 0.21% Mo
Steel group: Structural steels
Note: Austenitized at 1670 C, grain size: 7-8. Comparison between predicted (calculated) and experimental TTT diagram for AISI 4130 steel before modification.
Reference: Not shown in this demo version.
Dongwoo Kim, Prediction of Microstructure Evolution of Heat-Affected Zone in Gas Metal Arc Welding of Steels, PhD Thesis, THE UNIVERSITY OF TEXAS AT AUSTIN, 2012, p. 86.

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