FND
FNDW
FNDYW
Spécifications
6495
Composition
Applications
• This case hardening steel has applications in all mechanical assemblies working at temperatures above 150°C e.g. gears, fuel injectors. It is also used for parts requiring a good adherent PVD layer.
This steel can be gas pressure quenched, which reduces distortion caused by heat treatment.
Characteristics
• Case hardening and through hardening steel with excellent hardenability, high mechanical properties and a surface hardness of around 700 HV after carburizing at tempering temperatures of up to 350°C.
• The good temper resistance of this steel allows it to be used with a duplex treatment (carburizing + quenching + nitriding) to obtain a good case depth and surface hardness of more than 800 HV.
Mechanical properties
| Heat treatment |
UTS (N/mm²) |
0,2% YS (N/mm²) |
A (%) |
KV (J) |
|---|---|---|---|---|
| T + F + Rv 300°C | 1400 | 1120 | 13 | 120 |
| Tgaz + F + Rv 300°C | 1350 | 1030 | 13 | 110 |
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 |