AISI 4137 Steel

Steel name: AISI 4137
Diagram No.: 8169
Type of diagram: CCT
Mat. No. (Wr. Nr.) designation: 1.7220
DIN designation: 34CrMo4
AISI/SAE designation: AISI 4137
Chemical composition in weight %:
Extremely low carbon bainitic steel: 0.009% C, 0.26% Si, 1.99% Mn, 0.015% P, 0.015% S, 0.034% Al, plus Nb, Ti, B
Conventional low alloy steel (AISI 4137): 0.34% C, 0.22% Si, 0.80% Mn, 0.016% P, 0.014% S, 1.08% Cr, 0.21% Mo
Steel group: Carbon steels
Note: CT diagram of extremely low carbon (0.009% C) bainitic steel and conventional low alloy steel (0.34% C).
Reference: Not shown in this demo version.
Kazukuni Hase, et al., New Extremely Low Carbon Bainitic High-Strength Steel Bar Having Excellent Machinability and Toughness Produced by TPCP Technology, KAWASAKI STEEL TECHNICAL REPORT No. 47 December 2002, pp. 35-41.

Transformation Diagrams


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