Through hardening steels
CLARMHBR
Spécifications
EU
30NiCrMoV14
Composition
C
0.3
Ni
3.5
Cr
1.5
Mo
0.4
V
0.18
Mn
0.2
Applications
• Large caliber gun barrels and accessories (breech rings, breech blocks, muzzle brakes, etc…).
• Pressure vessels.
• Mechanical parts in the range of YS 900 to 1200 N/mm2.
Characteristics
• High mechanical characteristics.
• Good impact strength at low temperature.
• High level of hardenability in water and oil.
• Good characteristics at high temperatures.
Mechanical properties
| Heat treatment |
UTS (N/mm²) |
0,2% YS (N/mm²) |
A (%) |
KV -40°C (J) |
|---|---|---|---|---|
| T + Rv 600°C | 1200 | 1100 | 15 | 60 |
| T + Rv 570°C | 1300 | 1220 | 15 | 40 |
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 |