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20NiCrMo2-2 Steel
Steel name: 20NiCrMo2-2
Table No.: 1749
DIN designation: 21NiCrMo2
Mat.No. (Wr.Nr.) designation: 1.6523
AISI/SAE designation: 8620 appr.
EN designation: 20NiCrMo2-2
UNI designation: 20NiCrMo2
AFNOR designation: 20NCD2
BS designation: 805M20
GOST designation: 20HGNM
GB designation: 20CrNiMo
Chemical composition in weight %: 0.17-0.23% C, max. 0.40% Si, 0.65-0.95% Mn, max. 0.025% P, max. 0.035% S, 0.35-0.75% Cr, 0.15-0.25% Mo, 0.40-0.0% Ni
Steel group: Case hardening steels
Applications: No data
Comment: Ac1=735, Av3=820 C, Ms (core)=380 C, Ms (carburized surafce)=200 C.
Reference: Not shown in this demo version.
Heat Treatment
Core hardening: 860-900 C/oil, polymer, salt bath
Carburizing: 880-980 C
Tempering: 150-200 C
Hardenability test
Quenching: 870 C/water
Hardenability Table
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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
Disclaimer: The material data is a central depository of information based on global actual tests and calculated software data that is available to the public for a fee. The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other purposes. There is no representation that the recipient of this literature will receive updated editions as the become available.