Through hardening steels
BMV4
BMV4W
Spécifications
EU
40CrMoV20
USA
UNS:T20811
AMS
6487
AIR
40CDV20 E-40CDV20
WL
1.7784
Composition
C
0.4
Cr
5
Mo
1.3
V
0.45
Applications
• Mechanical parts working at high temperatures.
• Fasteners for high temperature environments.
Characteristics
• Good mechanical strength at temperature.
• Good creep resistance up to 400°C.
•Nitrurable steel.
Mechanical properties
| Heat treatment |
UTS (N/mm²) |
0,2% YS (N/mm²) |
A (%) |
KCU (J/cm²) |
|---|---|---|---|---|
| T + 2xRv 570°C | 1850 | 1450 | 9 | 30 |
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 |