• GKH® is used to produce nitrided parts which need to be extremely stable after hardening and tempering. It is particularly suitable for producing parts for deep nitriding.
• Gears, crankshafts, precision parts, aircraft parts.
•Bearing rings working up to 400°C.
• Nitriding steel with an excellent level of hardenability and particularly high mechanical properties, impact strength and fatigue limit (GKH®W and GKH®YW grades).
• It may be nitrided in the heat treated condition to obtain a strength from 900 N/mm2 to 1350 N/mm2. The nitrided layer is ductile.
|T + Rv 600°C||1250||1060||15||130|
|T + Rv 660°C||1080||900||19||170|
Key to heat treatment symbols
|Thermo-mechanical treatment||TM||Quenched and tempered||T+RV|
|Sub-zero treatment||F||Solution treated and aged||H+V|