Martensitic stainless steels

APX

Spécifications

Common name
431
EU
X17CrNi16-2
USA
UNS: S43100
AISI: 431
AMS
5628
AIR
Z15CN17-03
ISO Symbol
X17CrNi16-2
ISO Num
1.4057
WL
1.4044
BS
S80
ASTM grade
431
ASTM std
A276
A479
F899

Composition

C
0.16
Ni
2
Cr
17

Applications

• Nuclear energy.
• Aerospace industry, marine applications.
• Chemical, oil and steam industries.
• Plastics processing industry.
• For the manufacture of welded parts, please use our APX®4 steel.

Characteristics

• Martensitic stainless steel, equivalent to 13 % chromium steel in terms of corrosion.
• Resistant to sea water, saline atmosphere and salt spray.
• Very good resistance to organic acids and some mineral acids.
• Very suitable where a high polish is required.

Mechanical properties

Heat
treatment
UTS
(N/mm²)
0,2%
YS
(N/mm²)
A
(%)
T + Rv 400°C 1400 1050 13
T + Rv 630°C100075015

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

CX13VDW

Martensitic stainless steels

X17U4

Stainless steels with structural hardening

XD15NW

Martensitic stainless steels