20MnCrS5 Steel

Steel name: 20MnCrS5
Diagram No.: 1521
DIN designation: 20MnCrS5
Chemical composition in weight %: 0.10-0.15% C, 0.15-0.35% Si, 0.40-0.60% Mn, max. 0.020% P, 0.005-0.010% S, 1.35-1.60% Cr, 3.25-3.75% Ni, max. 0.15% Mo
Steel group: Case hardening steels
Applications: Case-hardening steel with low carbon content but good hardenability reaching good wear resistance due to high surface hardness after hardening. The small grain size benefits in good ductility and fatigue strength. Suitable for gearboxes and axle gears.
Comment: Ms=395 C, Ac1=694 C, Ac3=806 C.
Reference: Not shown in this demo version.

Heat Treatment
Carburizing: 860-900 C, in air
Hardening: 830-870 C, quenching in oil or water
Tempering: 150-200 C, in air

Hardenability Diagram

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Other Steel Data links:
Carbides in Steel
CCT and TTT Diagrams of Steels
CCT and TTT Diagram Calculating Service
Hardenability Calculating Service
Macro Defects in Steel
Metal Etchants
Non-Metallic Inclusions in Steel
Semiconductor Etchants
Transformation Diagrams of Non-Ferrous Alloys
Tempering Diagrams of Steels

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