Maraging steels

MARVAL18

Spécifications

Common name
Maraging 250
EU
X2NiCoMo18-8-5
USA
UNS: K92890
AMS
6512
AIR
E-Z2NKD18
WL
1.6359
BS
S162
ASTM grade
72
ASTM std
A579

Composition

C
0.03
Ni
18
Mo
5
Ti
0.5
Co
8

Applications

• Aerospace industry:
High strength parts:
– Structural components
– Welded assemblies
– Deck landing hooks
– Rocket motor bodies
– Defence components
– Fasteners.

Characteristics

• Precipitation hardened, maraging type steel, vacuum melted and consumable electrode remelted.
• High yield strength and good impact strength.
• Good weldability.
• Surface hardening by nitriding is possible.

Mechanical properties

Heat
treatment
UTS
(N/mm²)
0,2%
YS
(N/mm²)
A
(%)
H 1070 870 14
H + V 480°C185017809

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

MLX17

Stainless steels with structural hardening

819AW

Through hardening steels

MLX19

Stainless steels with structural hardening