Technical data for 20NiCrMoS6-4 cold-heading steel wire, with a specification standard of ISO 4954. View the current grade’s chemical composition, mechanical properties, and related technical requirements.
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 B.1 - Combinations of heat treatment condition at delivery, product form, and applicable requirements
Heat-treatment condition at delivery
Symbol
Products form a
Applicable requirements in cases where the steel concerned has been ordered with reference to the steel names indicated in
Wire rod
Bar
Wire
T a b les B. 2,B.3,B.4 or B.5
Ta bles B. 2,B.3,B.4,B.5,B.6 or B,7
Optional
As hot-rolled or peeled
+AR or +PE
X
X
X
Chemical composition as specified in Table B.2
Mechanical properties as specified in Ta b les B.3, B.4 and B.5
Chemical compositior as specified in Table B.2
Mechanical properties as specified in Tables B.3, B.4 and B.5
Values for hardenability according to Ta b les B.6 and B.7
Supplementa- ry or special requirements as specified in Annex Eh
Cold drawn
+AR+C
-
X
X
Cold drawn + spheroidized
+AR+C+AC
-
X
X
Cold drawn + spheroidized+skin passed
+AR+C+AC +LC
-
X
X
Spheroidized or spheroidized+peeled
+AC or +AC +PE
X
X
X
Spheroidized+cold drawn
+AC+C
X
X
Treated to ferrite- pearlite structure and hardness range
+FP
-
X
-
Others
Other delivery conditions may be agreed at the time of ordering
a X=applicable,-=not applicable. b If agreed at the time of the enquiry and order.
2. Chemical composition
Table B.2 - Chemical composition of steels for surface hardening (applicable to cast analysis)
Table B.2 - Chemical composition of steels for surface hardening (applicable to cast analysis)
Steel name b
% mass fraction a
C
Si c
Mn
P
S
Cr
Ni
Mo
B
Cu
20NiCrMoS6-4
0,16 to 0,23
0,30
0,50 to 0,90
0,025
0,020 to 0,040
0,60 to 0,90
1,40 to 1,70
0,25 to 0,35
—
0,25
Elements not quoted in this table should not be intentionally added to the steel without the agreement of the purchaser,except those intended for finishing the heat.All reasonable precautions shall be taken in order to prevent the addition of such elements from scrap or other materials used in the production process,which can affect the hardenability, mechanical properties and applicability To improve the performance of cold heading,it is possible to add Al:0,020 %to 0,050 % a Maximum values unless otherwise indicated. b In the case of steels with hardenability requirements (see Ta bles B. 6 and B.7),minor deviations from the specified limits are permitted (with the exception of sulfur and phosphorus),provided that they do not exceed 0,01 %for carbon and the values indicated in Table 2 for the other elements. c A lower silicon content or a specific silicon range may be agreed at the time of ordering.
3. Mechanical properties
Table B.5 - Mechanical properties of alloy steel grades
Table B.5 - Mechanical properties of alloy steel grades (continued)
Steel name
Diameter
Delivery condition
+AC
+FP
+AR+C+AC
+AR+C+AC+LC
+AC+C
above mm
up to mm
Rm max. MPa
Z min %
HB Min./max.
Rm max. MPa
Z min %
Rm max. MPa
Z min. %
Rm max. MPa
Z min. %
20NiCrMoS6-4
2
5
610
60
650
58
—
5
10
610
58
149
201
590
60
630
58
730
55
10
25
610
58
149
201
590
60
630
58
720
55
4. Hardenability requirements
Table B.6 - Hardness limits for standard hardenability steel grades (H class)
Table B.6 - Hardness limits for standard hardenability steel grades (H class) (continued)
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
20NiCrMoS6-4
+H
880
max.
49
49
48
48
47
47
46
44
41
39
38
37
36
min.
41
40
39
36
33
30
28
26
23
21
—
—
—
Table B.7 - Hardness limits for steel grades with restricted hardenability scatter bands (HH and HL classes)
Table B.7 – Hardness limits for the scatter band of steel grades with restricted hardenability (HH and HL grades) (continued)
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
20NiCrMoS6-4
+HH
880
max
49
49
48
48
47
47
46
44
41
39
38
37
36
min.
44
43
42
40
38
36
34
32
29
27
26
25
24
+HL
max
46
46
45
44
42
41
40
38
35
33
32
31
30
min.
41
40
39
36
33
30
28
26
23
21
—
—
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.
