Stainless steels with structural hardening

MLX19

Spécifications

EU
X1NiCrMoAlTi12-10-2
USA
UNS: S11902
AMS
5955

Composition

C
≤ 0.02
Ni
12.25
Cr
10
Mo
2
Ti
1.15
Al
1.45

Applications

• Forgings and mechanical parts in stainless steel requiring very good mechanical properties.
• Structural parts for the aerospace industry.
• Missile components.
• Fasteners.
• High pressure pumps and valves.
• Offshore industry.

Characteristics

• Precipitation hardened stainless steel of very high purity, vacuum primary melted and consumable electrode remelted.
• Excellent mechanical properties in the longitudinal and transverse directions.
• Excellent balance between strength and toughness properties, and excellent fatigue resistance.
• Good resistance to corrosion and stress corrosion.
• Very good weldability. Welding should preferably be carried out in the solution treated condition. Aging carried out after welding allows both the parent metal and weld bead to be hardened.

Mechanical properties

Heat
treatment
UTS
(N/mm²)
0,2%
YS
(N/mm²)
A
(%)
H + V 510°C 1890 1750 10
H + V 490°C193018009

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

819AW

Through hardening steels

NC310YW

Through hardening steels

NC40SW

Through hardening steels