Steels for nitriding

GK3

Spécifications

EU
31CrMo12
AIR
30CD12
ISO Symbol
31CrMo12
32CrMo12
ISO Num
1.8515
1.7361
WL
1.8564

Composition

C
0.3
Cr
3
Mo
0.4

Applications

• Gears.
• Spindles.
• Machine tool components.
• Various mechanical parts.

Characteristics

• Nitriding steel for surface hardness ~800 HV

Mechanical properties

Heat
treatment
UTS
(N/mm²)
0,2%
YS
(N/mm²)
A
(%)
KCU
(J/cm²)
T + Rv 625°C 1000 850 18 150

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

GKP

Steels for nitriding

GH4

Through hardening steels

GKH

Steels for nitriding