Quality17NiCrMo6-4
CategorySpecial steel
Standard ref.
UNI EN 10084
Werkstoff nr.1.6566
Descrizione

It is a non-alloyed steel which can be quenched in oil and in water. It is possible to produce large-scale pieces with adequately transformed structures. It is one of the most used carbon steel in Europe. It is the most well-known case-hardening steel in Italy due to the excellent properties which make 17NiCrMo6-4 suitable for several application. It has got a medium-high hardenability and a good workability. After casehardening and quenching treatment the surface reaches a considerable hardness. It is employed to produce mechanical parts subject to wear (gears, camshafts, bushings, pinions and pins).

Chemical composition 17NiCrMo6-4(%)
C
Mn
P
S
Cr
Si
Mo
Ni
min
max
min
max
max
max
min
max
min
max
min
max
min
max
0,14
0,20
0,60
0,90
0,035
0,035
0,80
1,10
0,15
0,40
0,15
0,25
1,20
1,50

Mechanical characteristics 17NiCrMo6-4

Hot-rolled with hardening core (Ø of the specimen in mm)
indicative
Ø 11
Ø 30
Ø 63
Yield Limit, Rp0,2 (MPa) min
980
735
635
Tensile Strength
R
m (MPa)
min
1230
980
830
max
1520
1270
1130
Elongation A (%) min
8
9
10
Resilience Kv (J) min
30
32,5
35
Hardness HBmin
363
295
249
max
432
373
339

Matches table 18NiCrMo5

Italiy (UNI)
Europe (EN)
Germany (DIN)
France (AFNOR)
United Kingdom (BS)
USA (AISI/SAE)
17NiCrMo6-4
17NiCrMo6-4
18NCD6
815M17
4317