Martensitic stainless steels

APX4

APX4W

Spécifications

EU
X4CrNiMo16-5-1
AIR
Z8CND17-04
ISO Symbol
X4CrNiMo16-5-1
ISO Num
1.4418

Composition

C
0.06
Ni
4
Cr
16
Mo
1

Applications

• Nuclear energy.
• Aerospace industry, marine applications.
• Chemical industry.
• Welded assembly-critical parts.
• Plastics processing industries.

Characteristics

• Martensitic stainless steel, equivalent to 18 % chromium steels in terms of corrosion.
• Resistant to sea water, saline atmosphere and salt spray.
• Very good resistance to organic acids and some mineral acids.
• Good weldability.

Mechanical properties

Heat
treatment
UTS
(N/mm²)
0,2%
YS
(N/mm²)
A
(%)
KCU
(J/cm²)
T + Rv 400°C 1200 950 16 100
T + Rv 580°C100075018120

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

X17U4

Stainless steels with structural hardening

X13VD

Martensitic stainless steels