Stainless steels with structural hardening

MLX17

Spécifications

EU
X1CrNiMoAlTi12-11-2
USA
UNS: S11000
AMS
5937
ISO Symbol
X1CrNiMoAlTi12-11-2
ISO Num
1.4612

Composition

C
≤ 0.02
Ni
11
Cr
12
Mo
2
Ti
0.3
Al
1.5

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
(%)
KV
(J)
H + V 535°C 1590 1500 12 45
H + V 510°C172516101125

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

MARVAL18

Maraging steels

MLX19

Stainless steels with structural hardening

MARVALX12H

Stainless steels with structural hardening