Steels for nitriding
GK3
Spécifications
EU
31CrMo12
AIR
30CD12
ISO Symbol
31CrMo12
32CrMo12
32CrMo12
ISO Num
1.8515
1.7361
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 |