20NiMo9-7 Steel

Steel name: 20NiMo9-7
Diagram No.: 2031
DIN designation: 20NiMo9-7
Chemical composition in weight %: 0.18-0.21% C, max. 0.10% Si, 0.22-0.30% Mn, max. 0.025% P, max. 0.002% S, 0.35-0.40% Cr, 0.67-0.70% Mo, 2.25-2.35% Ni, max. 0.10% V
Steel group: Case hardening steels
Applications: No data
Comment: Ovako 158Q is an ingot cast case hardening steel specially designed to minimize the occurrence of internal oxidation. Furtermore it is produced with the highest cleanliness level, isotropic quality (IQ), to ensure a minimum of oxidic and sulphidic inclusions. Ovako 258Q is an ingot cast case hardening variant, with slightly increased hardenability. This variant is also produced with the highest cleanliness level, isotropic quality (IQ). Similar designations: 22NiMo9-9. Ac1=690 C, Ac3=815 C, Ms=406 C.
Reference: Not shown in this demo version.

Heat Treatment
Hardening: 840-890 C, oil

Hardenability Diagram

Price: 20.00 US $
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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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