Quality C40E C40R
Category Special steels, carbon steel
Special steels, carbon steel
Standard ref.
EN 10083 EN 10083
Werkstoff nr. 1.1186 1.1189



Description

Among the hardening and tempering special steels, C40E and C40R are the most commonly used steels in Italy, and used to produce a vast range of mechanical components: axles, shafts, gears, pins, flanges etc. They are normally supplied as rolled bars and forged bars, though it is not uncommon to find these special steels supplied as drawn bars and peeled bars.

Chemical composition C40E (%)
C
Mn
P
S
Cr
Si
Mo
Ni
Cr+Ni+Mo
min
max
min
max
min
max
max
max
max
max
max
max
0,37
0,44
0,50
0,80
-
0,030
0,035
0,40
0,40
0,10
0,40
0,63


Chemical composition C40R (%)
C
Mn
P
S
Cr
Si
Mo
Ni
Cr+Ni+Mo
min
max
min
max
min
max
max
max
max
max
max
max
0,37
0,44
0,50
0,80
0,020
0,040
0,035
0,40
0,40
0,10
0,40
0,63


Mechanical characteristics C40E e C40R
 
Hot rolled normalized
of the specimen in mm)
 
≤ 16
> 16 ≤ 100
> 100 ≤ 250
Yield Limit, Rp0,2 (MPa) min
320
290
260
Tensile Strength
R
m (MPa)
min
580
550
530
max
740
720
700
Elongation A (%) min
16
17
17
Resilience Kv (J) min
32
30
28
Hardness HB min
175
165
160
max
225
215
210


Matches table C40E e C40R
Italiy (UNI)
Europe (EN)
Germany (DIN)
France (AFNOR)
United Kingdom (BS)
USA (AISI/SAE)
C40
C40E - C40R
Ck40 - Cm40
XC42H1 - XC42H1u
080M40
1040

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