4520 Steel

Steel name: 4520
Diagram No.: 1562
AISI/SAE designation: 4520
Chemical composition in weight %: 0.20% C, 0.55% Mn, 0.051% S*, 0.37% Si, 0.035% Ni, 0.07% Cr, 0.59% Mo, *-off-analysis
Steel group: Case hardening steels, molybdenum steels
Applications: No data
Comment: McQuaid-Ehn grain size: 7-8. Direct quench.
Reference: Not shown in this demo version.

Heat Treatment
All bars normalized: 1700 F
Core: Austenitized 20 min 1700 F
Case: Pack carburized 9 h 1700 F, direct quenched

Hardenability Diagram


Click the image to enlarge the diagram.

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