Technical data for C20C cold heading wire, compliant with ISO 4954-Annex A. 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 A.1 – Combinations of heat treatment condition at delivery, product form, and applicable requirements
Delivery condition
Symbols
Product form a
Applicable requirements
Wire rod
Bar
Wire
Untreated (as hot-rolled)
+AR
X
X
-
Chemical composition as specified in Table A.2
Mechanical properties as specified in Table A.3
Supplementary or special requirements as specified in Annex Eb
peeled Untreated+
peeled
+AR+PE
X
X
-
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
Annealed to achieve spheroidized carbides +
As treated or peeled
+AC or AC+PE
X
X
-
cold drawn
+AC+C
-
X
X
Other
Other delivery conditions may be agreed at the time of ordering
a X=applicable,—=not applicable b Ifagreed at the time of enquiry and order.
2. Chemical composition
Table A.2 – Chemical composition of steels not intended for heat treatment after cold working (applicable to cast analysis) a
Steel name
%mass fraction a
C
Si
Mn
P
S
Cr
Ni
Mo
Al b
Cu
Cr+Ni+Mo
C20C
0,18 to 0,22
0,10
0,70 to 0,90d
0,025
0,025
0,30
0,30
0,10
0,020 to 0,060
0,30
0,50
1111111
1111111
3. Mechanical properties
Table A.3 – Mechanical properties of wire, bars, and wire not intended for heat treatment after cold working
Steel name
Diameter
Delivery Condition
+AR or +AR+PE
+AC or+AC+PE
+AR+C
+AR+C+AC
+AR+C+AC+LC
+AC+C
above mm
up to mm
Rm max. MPa
Za min. %
Rm max. MPa
Z min. %
Rm max. MPa
Z min. %
Rm max MPa
.
Z min. %
R max. MPa
Z min. %
Rm max. MPa
Min. %
C20C C20GC
2
5
——
—
470
67
510
63
5
10
560
55
480
65
650
53
460
67
500
63
570
60
10
40
560
55
480
65
640
53
460
67
500
63
560
60
40
100
560
55
480
65
—
—
—
—
C25C
2
5
—
—
500
65
540
60
5
10
590
50
510
60
680
50
490
65
530
60
600
55
10
40
590
50
510
60
670
50
490
65
530
60
590
55
40
100
590
50
510
60
—
—
C25GC
2
5
—
570
45
—
—
440
55
5
10
590
50
—
470
45
—
440
55
440
55
10
40
590
50
—
470
45
—
—
440
55
440
55
40
100
590
50
——
—
—
a The values are provided for reference only.
4. Hardenability requirements
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.
