Technical data for 25CrMo4 cold heading wire, compliant with ISO 4954-Annex C. View the chemical composition, mechanical properties, and related technical requirements for this grade.
Only data directly related to this material is shown here. Inspection, equipment, process and packaging information is linked separately.
1. Combinations of delivery conditions
Table C.1 Combinations of delivery heat treatment conditions, product forms, and applicable requirements
2. Chemical composition
Table C.2 - Chemical composition of boron-free steels for quenching and tempering (applicable to cast analysis)
Steel name b
% mass fraction a
C c
Si d
Mn
P
S
Cr
Ni
Mo
Cu
25CrMo4
0,22 to 0,29
0,30
0,60 to 0,90
0,025
0,025
0,90 to 1,20
—
0,15 to 0,30
0,25
3. Mechanical properties
Table C.5 - Mechanical properties of boron-free alloy steel grades
Steel name
Diameter
Delivery condition
+AC or +AC+PE
+AC+C+AC
+AC+C+AC+LC
above mm
up to mm
Rm max. MPa
Z min %
Rm max. MPa
Z min. %
Rm max. MPa
Z min. %
25CrMo4 25CrMoS4
2
5
570
62
610
60
5
40
580
60
560
62
600
60
4. Hardenability requirements
Table C.7 - Hardness limits for boron-free steel grades with specified (normal) hardenability (H grade)
Table C.9 - Scatter bands of hardness limits for boron-free steel grades with restricted hardenability (HH and HL grades) a
Steel name
Symbol
Austenitizing temperature ℃±5℃
Limits of range
Hardness HRC at a distance from quenched end of test piece(in mm) of
1,5
3
5
7
9
11
13
15
20
25
30
35
40
45
50
25CrMo4 25CrMoS4
+HH
850
max.
52
52
51
50
48
46
43
41
37
35
33
32
31
31
31
min.
47
46
44
41
39
37
34
32
28
26
24
23
22
22
22
+HL
max.
49
49
47
46
43
41
38
36
32
30
29
28
27
27
27
min.
44
43
40
37
34
32
29
27
23
21
20
—
—
min.
53
53
53
53
52
51
51
51
51
50
50
50
50
49
48
min
50
50
50
50
49
48
48
48
48
47
47
47
46
45
44
This table is not applicable to steels ordered with a restricted range of carbon content,see footnote c)in Table C.2.
Table C.10 Maximum diameter for achieving at least 90% martensite in core hardness testing (+CH grade)
Steel name
Symbol
Austenitizing temperature in the core hardening testa C±5℃
Min.core hardness ( 90 %martensite structure) HRC
Maximum diameter to ensure 90 %of martensite in the coreb mm
25CrMo4
+CH
850
41
13
a As a guideline,a hardening time at temperature of at least 30 min is recommended. The maximum diameters stated are those attainable with the lowest hardenability within each steel grade.Using +HH grades the maximum diameter can be increased.
TECHNICAL NOTE
Application and ordering note
Chemical composition, mechanical properties, tolerances and delivery condition must be confirmed against the applicable standard edition, customer drawing and order specification.
