42CrMo4 steel vs 42CrMoS4 steel

Both 42CrMo4 steel and 42CrMoS4 steel are alloy steel hardened and tempered plates under EN 10083-3 standard. There are little differences between 42CrMo4 steel and 42CrMoS4 steel plate. Below are the technical requirements comparison for your reference.

42CrMo4 steel and 42CrMoS4 steel chemical composition(%)
Grades
Material no.
C
Si max.
Mn
P  max.
S
Cr
Mo
42CrMo4
1.7225
0.38 - 0.45
0.40
0.60 - 0.90
0.025
max. 0.035
0.90 - 1.20
0.15 - 0.30
42CrMoS4
1.7227
0.38 - 0.45
0.40
0.60 - 0.90
0.025
0.020 - 0.040
0.90 - 1.20
0.15 - 0.30

42CrMo4 steel vs 42CrMoS4 steel hardness in quenched condition
Steel Grade
Range limits
HRC Hardness Measured From The Quenched End Of The Test Tube (MM)
symbolic

1,5
3
5
7
9
11
13
15
20
25
30
35
40
45
50
42CrMo4
max
61
61
61
60
60
59
59
58
56
53
51
48
47
46
45
42CrMoS4
min
53
53
52
51
49
43
40
37
34
32
31
30
30
29
29

42CrMo4 steel and 42CrMoS4 steel plates have an elevated hardenability, good heat resistance, excellent forging and good machinability with machine tools. it can be hardened on the surface or nitrited in order to elevate the wear resistance and the fatigue strength.
Done is better than perfect.

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