AISI 1045, 5140, 4140, 4340 Steels

Steel name: AISI 1045, 5140, 4140, 4340
Diagram No.: 8240
Type of diagram: TTT
AISI/SAE designation: AISI 1045, 5140, 4140, 4340
Chemical composition in weight %:
AISI 1045 steel: 0.47% C, 0.57% Mn, 0.06% Cu
AISI 5140 steel: 0.42% C, 0.68% Mn, 0.93% Cr
AISI 4140 steel: 0.37% C, 0.77% Mn, 0.98% Cr, 0.21% Mo
AISI 4340 steel: 0.42% C, 0.78% Mn, 0.80% Cr, 0.33% Mo, 1.79% Ni
Steel group: Structural steels
Note: Comparison of time-temperature transformation diagrams for AISI (a) 1045, (b) 5140, (c) 4140, and (d) 4340 steels.
Reference: Not shown in this demo version.

Transformation Diagrams

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