Maraging steels
MY19
Spécifications
Common name
Maraging 300
EU
X2NiCoMo18-9-5
USA
UNS: K93120
AMS
6514
WL
1.6354
1.6358
1.6358
Composition
C
≤ 0.010
Ni
18
Mo
4.9
Ti
0.7
Co
8.75
Al
0.1
Applications
• Structural parts.
• Rocket motor bodies for missiles.
• Centrifuge components.
Characteristics
• Very low carbon maraging steel containing Ni, Co, Mo and Ti, vacuum melted and consumable electrode remelted.
• High proof stress and good toughness.
• Excellent weldability.
Mechanical properties
| Heat treatment |
UTS (N/mm²) |
0,2% YS (N/mm²) |
A (%) |
KV (J) |
|---|---|---|---|---|
| H | 1070 | 870 | 14 | |
| H + V 480°C | 2050 | 1980 | 8.5 | 25 |
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 |