4520 Steel

Steel name: 4520
Diagram No.: 1559
AISI/SAE designation: 4520
Chemical composition in weight %: 0.24% C, 0.50% Mn, 0.39% Si*, 0.08% Ni, 0.13% Cr, 0.52% Mo, *-off-anlysis
Steel group: Case hardening steels, molybdenum steels
Applications: No data
Comment: McQuaid-Ehn grain size: 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

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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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