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Quality 40NiCrMo7
Category Special Steels, Quenched and Tempered Steels
Standard ref.
UNI 7845
Werkstoff nr. 1.6565

Description

40NiCrMo7 is widely used in European marketplace such as those American. It stands out for great hardenabilty and excellent fatigue strenght. It is usually supplied in hot rolled or forged and turned bars. Thanks to its hardenability, it is frequently used to produce large-scale components subject to harsh conditions, such as axles for hydroelectric turbines. It is employed also to realize highest resistance bolts and nuts.

Chemical composition 40NiCrMo7 (%)

C
Mn
P
S
Cr
Si
Mo
Ni
min max min max max max min max min max min max min max
0,37 0,44 0,50 0,80 0,035 0,035 0,60 0,90 0,15 0,40 0,20 0,30 1,60 1,90

Mechanical characteristics 40NiCrMo7

Hot rolled normalized
of the specimen in mm)
≤ 16 > 16 ≤ 40 > 40 ≤ 100 > 100 ≤ 160 > 160 ≤ 250
Yield Limit, Reh(MPa) min 835 785 735 665 635
Tensile Strength
R
m (MPa)
min 1030 980 930 850 780
max 1230 1180 1130 1030 980
Elongation A (%) min 11 11 12 13 13
Resilience Kv (J) min 30 30 30 30 30
Hardness HB min
max

Matches table 40NiCrMo7

Italiy (UNI)
Europe (EN)
Germany (DIN)
France (AFNOR)
United Kingdom (BS)
USA (AISI/SAE)
40NiCrMo7 40NiCrMo7 40NiCrMo8-4 817M40 4340
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