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°C1430138510.545

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

See also

MARVAL13X

Stainless steels with structural hardening

MARVALX12H

Stainless steels with structural hardening

X15U5W

Stainless steels with structural hardening