Technical data for 20NiCrMoS6-4 cold-drawn steel wire, compliant with the EN 10263 standard. Review 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 1 – Combinations of delivery conditions, product forms, and conformity requirements
Table 2 – Surface quality under delivery conditions
Surface condition upon delivery
Symbol
Bar
Rolled wire
Wire
unless otherwise agreed
hot-rolled
none or +AR
X —
X —
—
Special surface condition delivered by agreement
cold-drawn
+C
— X
— -
X
after-drawn
+LC
— X
— X
X
peeled
+PE
X
X
X
2. Chemical composition
Table 3 – Steel grades and chemical composition. Cast analysis, mass fraction %
Steel grade
C
Si max.ǎ
Mn
P max
S
Cr
Mo
Ni
B
Cu max.
Abbreviated name
Material number
20NiCrMo2-2 20NiCrMoS2-2 20NiCrMoS6-4
1.6523 1.6526 1.6571
0.17 to 0.23 0.17 to 0.23 0.16 to 0.23
0,30 0,30 0,30
0.65 to 0.95 0.65 to 0.95 0.50 to 0.90
0,025 0,025 0,025
0.025 max. 0.020 to 0.040 0.020 to 0.040
0.35 to 0.70 0.35 to 0.70 0.60 to 0.90
0.15 to 0.25 0.15 to 0.25 0.25 to 0.35
0.40 to 0.70 0.40 to 0.70 1.40 to 1.70
0,25 0,25 0,25
a A lower silicon content or a specified silicon range may be agreed upon at the time of order. NOTE 1 Elements not listed in this table should not be intentionally added to the steel, except for final refining of the melt, without the buyer’s consent. All reasonable precautions shall be taken to prevent the introduction of such elements from scrap and other materials used in production that could adversely affect hardenability, mechanical properties, and service performance. NOTE 2 For steels with hardenability requirements (see Tables 8 and 9), smaller deviations from the specified limits are permissible (with the exception of sulfur and phosphorus), provided that they do not exceed the values given in Table 4 for carbon 0,01 %and for the other elements. NOTE 3 To improve the results of cold heading, it is possible to add 0,020 %to 0.050 %aluminum.
Table 4 – Permissible limit deviations for the applicable limits of workpiece analysis and melt analysis in Table 3
Elements
Limit values according to melt analysis, mass fraction in %
Limits for product analysis, mass fraction in %a
C
≤0,24
±0.02
Si
≤0,30
±0,03
Mn
≤1,00
±0,04
>1,00 ≤1,40
±0,06
P
≤0,025
+0,005
S
≤0,040
+0,005
Cr
≤1,70
±0,05
Mo
≤0.30
±0.0.3
>0.30 ≤0,50
±0,04
Ni
≤1,00
±0,03
>1,00 ≤1,70
±0,05
B
≤0,005(
±0,0003
Cu
≤0.25
+0.03
a ± means that, for a given melt, either the upper or the lower limit of the range specified for melt analysis in Table 3 may be exceeded, but not both simultaneously. b For steels with a defined sulfur range (0,020 %to 0,040 %according to melt analysis), the tolerance is ±0.005 %.
3. Mechanical properties
Table 7 – Mechanical properties of alloy steels
Steel grade
Diameter
Delivery condition
Short name
Work material number
Over mm
bis mm
+AC
+FP
+U+C+AC
+U+C+AC+LC
+AC+C
Rmmax. MPa
Zamin. %
Rmmax. MPa
Z min. %
Rmmax. MPa
Z min. %
Rmmax. MPa
Z min. %
Rmmax. MPa
Z min. %
20NiCrMoS6-4
1.6571
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 8 – Hardness limits for steel grades with normal hardenability requirements (H grade, see 6.4.1)
Steel grade
Symbol
Austenitizing temperature °C ±5℃
Range limit
Hardness HRC at a distance from the quenched end face, mm
Abbreviated name
Material number
1,5
3
5
7
9
11
13
15
20
25
30
35
40
20NiCrMoS6-4
1.6571
+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 9 – Hardness values for steel grades with narrow Greny hardenability requirements (HH and HL grades; see 6.4.2)
Steel grade
Symbol
Austenite‑Transformation Temperature
Yield Strength
HRC Hardness at a Distance from the Quenched End (mm)
Abbreviated name
Material number
C±5℃
2
3
5
7
9
11
13
15
20
25
30
35
40
20NiCrMoS6-4
1.6571
+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.
