Steels for nitriding

GKP

GKPW
GKPYW

Spécifications

EU
32CrMoNiV5
USA
UNS: K23280
AMS
6496
6497
6498

Composition

C
0.3
Cr
1.4
Mo
1.2
V
0.3
Ni
0.8

Applications

• GKP® is used to produce nitrided parts which need to be extremely stable after hardening and tempering treatment.
• It is particularly suitable for deep nitriding.
• Gears, crankshafts, precision parts, aircraft parts.

Characteristics

• Nitriding steel with an excellent level of hardenability and particularly high mechanical properties, impact strength and fatigue limit.
• It may be nitrided in the heat treated condition with a core strength of 900 N/mm2 to 1450 N/mm2. The nitrided layer is not brittle.
• In comparison with other nitriding steels, GKP® allows the nitriding process time to be reduced by up to 40 % for the same nitrided layer depth.
• With the same nitriding process time, GKP® results in a depth gain of up to 0.2 mm. GKP® makes it possible to obtain nitrided layers with a depth of 0.9 mm.

Mechanical properties

Heat
treatment
UTS
(N/mm²)
0,2%
YS
(N/mm²)
A
(%)
KV
(J)
T + Rv 640°C 1250 1175 15 80
T + Rv 660°C1130106016110

Key to heat treatment symbols

Solution treated H Annealed R
Thermo-mechanical treatment TM Quenched and tempered T+RV
Sub-zero treatment F Solution treated and aged H+V

See also

FND

Steels for carburizing

GKH

Steels for nitriding

ARMAD

Through hardening steels