Steels for carburizing

FADH

FADHW
FADHYW

Spécifications

EU
14NiCrMo13-4
USA
UNS: K43214
AMS
6547
6548
6549
AIR
16NCD13
ISO Symbol
14NiCrMo13-4
ISO Num
1.6657
WL
1.6657
1.6658
BS
S157

Composition

C
0.16
Ni
3.2
Cr
1
Mo
0.25

Applications

• Various heavily stressed carburized and non carburized mechanical parts.
• Parts for the aerospace industry.

Characteristics

• After carburizing, quenching and tempering, the surface hardness is around 700 HV.
• Good toughness of the carburized layer.
• High hardenability.
• Good mechanical properties.
• Good resistance to fatigue.

Mechanical properties

Heat
treatment
UTS
(N/mm²)
0,2%
YS
(N/mm²)
A
(%)
KV
(J)
T + Rv 150°C 1350 1000 14 140

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

FADS

Steels for carburizing

FDG

Steels for carburizing

FND

Steels for carburizing