Stainless steels with structural hardening
MARVALX12
Spécifications
EU
X1CrNiMoAlTi12-9
USA
UNS: S11800
AMS
5928
ISO Symbol
X1CrNiMoAlTi12-9
ISO Num
1.4530
Composition
C
< 0.02
Ni
9
Cr
12
Mo
2
Ti
0.3
Al
0.7
Applications
• Heavily stressed parts requiring good corrosion resistance and very good mechanical properties.
• Aerospace industry.
• Marine applications.
• Autoclaves and pressure chambers.
Characteristics
• Precipitation hardened stainless steel of very high purity, vacuum melted and consumable electrode remelted.
• Excellent mechanical properties in the longitudinal and transverse directions.
• Excellent balance between strength, toughness and fatigue properties, especially at the 1200 N/mm2 strength level (>PH13-8Mo).
• Good resistance to corrosion and stress corrosion.
• Good weldability.
Mechanical properties
| Heat treatment |
UTS (N/mm²) |
0,2% YS (N/mm²) |
A (%) |
KV (J) |
|---|---|---|---|---|
| H + V 555°C | 1240 | 1195 | 12.5 | 120 |
| H + V 520°C | 1430 | 1385 | 10.5 | 45 |
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 |