18NiCrMo14-6 Steel - Hardenability Diagram

18NiCrMo14-6 Steel

Steel name: 18NiCrMo14-6
Diagram No.: 1424
Mat. No. designation: 18NiCrMo14-6
EN designation: 18NiCrMo14-6
Chemical composition in weight %: Steel 255G: 0.15-0.18% C, 0.15-0.40% Si, 0.40-0.70% Mn, max. 0.025% P, max. 0.005% S, 1.30-1.60% Cr, 3.25-3.75% Ni, 0.15-0.25% Mo. Steel 255Q: 0.15-0.18% C, 0.15-0.40% Si, 0.40-0.70% Mn, max. 0.025% P, max. 0.005% S, 1.30-1.60% Cr, 3.25-3.75% Ni, 0.15-0.25% Mo
Steel group: Case hardening steels
Applications: No data
Comment: Steel is a case hardening steel with high toughness used for bearing and transmission components. There are two different versions of the grade with high cleanliness requirements. The high hardenability ensures a through hardenability of large sections.
Reference: Not shown in this demo version.

Heat Treatment
QT: 840 - 890 C/oil, hardening of as-carburized component: 780-830 C/oil.
Tempering: 160-250/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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