Stainless steels with structural hardening

X17U4

X17U4W

Spécifications

Common name
17-4PH
630
EU
X5CrNiCuNb16 -4
USA
UNS: S17400
AMS
5643
5622
ISO Symbol
X5CrNiCuNb16 -4
ISO Num
1.4542
WL
1.4548
ASTM grade
630
ASTM std
A564

Composition

C
< 0.07
Ni
4
Cr
16.5
Cu
4
O2
0.35

Applications

• Forgings and mechanical parts in stainless steel requiring very good mechanical properties and an acceptable coefficient of friction.

Characteristics

• Precipitation hardened martensitic stainless steel.
• Good resistance to various corrosive agents.
• Good weldability.

Mechanical properties

Heat
treatment
UTS
(N/mm²)
0,2%
YS
(N/mm²)
A
(%)
KV
(J)
H + V 550°C 1070 1000 10 120
H + V 620°C95075016140

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

X15U5W

Stainless steels with structural hardening

APX4

Martensitic stainless steels

MARVAL13X

Stainless steels with structural hardening