18NiCrMo5 Steel

Steel name: 18NiCrMo5
Table No.: 1926
AISI/SAE designation: 4317
EN designation: 17NiCrMo6-4
UNI designation: 18NiCrMo5
AFNOR designation: 18NCD6
BS designation: 815M17
GOST designation: 19HNM
Chemical composition in weight %: 0.15-0.21% C, 0.15-0.40% Si, 0.60-0.90% Mn, max. 0.035% P, max. 0.035% S, 0.70-1.00% Cr, 0.15-0.25% Mo, 1.20-1.50% Ni
Steel group: Case hardening steels
Applications: No data
Comment: Ac1=730 C, Ac3=815 C, Mf=140 C, Ms (core)=360 C, Ms (carburizing surface)=180 C.
Reference: Not shown in this demo version.

Heat Treatment
Core hardening: 840-870 C/oil, polymer
Carburizing: 880-930 C
Tempering: 150-180 C

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