18CrNiMo7-6 Steel

Steel name: 18CrNiMo7-6
Table No.: 1722
DIN designation: 17CrNiMo6
Mat.No. (Wr.Nr.) designation: 1.6587
AISI/SAE designation: ~4820
EN designation: 18CrNiMo7-6
UNI designation: 18CrNiMo7-6
AFNOR designation: 18CND6
BS designation: ~822M17
Chemical composition in weight %: 0.15-0.21% C, max. 0.40% Si, 0.50-0.90% Mn, max. 0.025% P, max. 0.035% S, 1.50-1.80% Cr, 0.25-0.35% Mo, 1.40-1.70% Ni
Steel group: Alloy steels
Applications: No data
Comment: Ac1-745 C, Ac3=825, Ms (core)=400 C, Ms (carburized surface)=170 C.
Reference: Not shown in this demo version.

Heat Treatment
Core hardening: 830-870 C/oil or polymer
Carburizing: 900-950 C
Hardening carburizing surface: 780-820 C/oil or polymer
Tempering: 15-200 C/air
Hardenability test
Quenching: 860 C/water

Hardenability Table


Click the image to enlarge the table.

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