EN 10083-1:1991 2C60 Steel: Specifications & Listings
EN 10083-1:1991 2C60: A higher carbon special steel for quenching and tempering to EN 10083-1:1991 (printed 2 C 60), with sulphur max. 0.035%. Supplied as semi-finished products, bars, rod, wide flats, hot rolled strip, sheet and plate, and forgings. Quenched and tempered tensile strength 850 to 1000 MPa for ruling sections up to 16 mm.
Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C
Cr
Cr+Mo+Ni
Mn
Mo
Ni
P
S
Si
0.57-0.65
<=0.40
<=0.63
0.60-0.90
<=0.10
<=0.40
<=0.035
<=0.035
<=0.40
Mechanical Properties
Condition
Quenched and tempered, ruling section d <= 16 mm
Elongation
11% min
Hardness
Soft annealed: 241 HB max
Tensile Strength
850 to 1000 MPa
Yield Strength
580 MPa min
More data from EN 10083-1:1991
From the standard
Other composition limitsTable III and its notes
Designation as printed
2 C 60
Pair grade
3C60 has the same limits except sulphur, controlled 0.020 to 0.040
Improved machinability
Steels with lead or higher sulphur, up to about 0.100% S, may be supplied on request (Table III, note 3)
Restricted options
Without hardenability or quenched and tempered or normalized property requirements, a carbon range of 0.05 and/or Cr + Mo + Ni below 0.45 may be agreed (Table III, note 5)
Elements not quoted in Table III are not intentionally added without the purchaser's agreement, other than for finishing the heat. With hardenability requirements, slight deviations within Table IV are permitted except for carbon, phosphorus and sulphur.
Source: EN 10083-1:1991 (UNI EN 10083-1), Table III and its notes
Mechanical properties, quenched and tempered3 sections
Ruling section
Yield strength Re, min (MPa)
Tensile strength Rm (MPa)
Elongation A, min (%)
Reduction of area Z, min (%)
Impact KV, min (J)
d <= 16 mm, t <= 8 mm
580
850 to 1000
11
25
-
16 mm < d <= 40 mm, 8 mm < t <= 20 mm
520
800 to 960
13
30
-
40 mm < d <= 100 mm, 20 mm < t <= 60 mm
450
750 to 900
14
35
-
Re is the upper yield strength or, if no yield phenomenon occurs, the 0.2% proof strength; A on gauge length 5.65 times the root of the original cross section; KV on longitudinal ISO V-notch test pieces, average of 3 values, no single value below 70% of the minimum. Ruling sections as in Appendix B. Sizes not listed are not covered by the standard. The standard prints 800 to 960 N/mm2 for 16 mm < d <= 40 mm; shown as printed.
Source: EN 10083-1:1991 (UNI EN 10083-1), Table IX
Mechanical properties, normalized3 sizes
Size
Yield strength Re, min (MPa)
Tensile strength Rm, min (MPa)
Elongation A, min (%)
d <= 16 mm, t <= 16 mm
380
710
10
16 mm < d <= 100 mm, 16 mm < t <= 100 mm
340
670
11
100 mm < d <= 250 mm, 100 mm < t <= 250 mm
310
650
11
Values also apply to the grades with hardenability requirements (H, HH, HL). Sizes not listed are not covered by the standard.
Source: EN 10083-1:1991 (UNI EN 10083-1), Table X
Maximum hardness by delivery conditionTable VIII
Treated to improve shearability (TS), max
255 HB
Soft annealed (TA), max
241 HB
Values also apply to the grades with hardenability requirements (H, HH, HL); not applicable to continuously cast slabs not further deformed. Depending on the cast and the dimensions, particularly for HH grades, soft annealing may be necessary.
Source: EN 10083-1:1991 (UNI EN 10083-1), Table VIII
Hardenability, end quench test (H)Hardness band
Hardness band (HRC, minimum to maximum) by distance from the quenched end (mm)
1
2
3
4
5
6
7
8
9
10
11
13
15
20
25
30
Distance from quenched end (mm)
1
2
3
4
5
6
7
8
9
10
11
13
15
20
25
30
Maximum, HRC
67
66
65
63
62
59
54
47
39
37
36
35
34
33
31
30
Minimum, HRC
60
57
50
39
35
33
32
31
30
29
28
27
26
25
23
21
Applies when ordered as 2C60 H. Provisional values for non alloy steels; a manufacturer whose band falls outside these limits informs the purchaser at ordering (Table V, note 1). End quench test at 830 ± 5 deg C (Table XIII).
Source: EN 10083-1:1991 (UNI EN 10083-1), Table V
Restricted hardenability (HH, HL), provisionalTable VI
Symbol
1 mm (HRC)
5 mm (HRC)
HH5
-
44 to 62
HH15
62 to 67
44 to 62
HL5
-
35 to 53
HL15
60 to 65
35 to 53
Apply to both the 2C and 3C grade. The figure after the symbol gives the distances (mm) at which the limits apply.
Source: EN 10083-1:1991 (UNI EN 10083-1), Table VI
Minimum hardness of strip as quenchedTable XI
Hardness, min
670 HV
Maximum strip thickness
2 mm
Applies to the quenching temperatures of Table XIII with oil cooling.
Source: EN 10083-1:1991 (UNI EN 10083-1), Table XI
Heat treatmentTable XIII
Quenching
800 to 840 deg C
Quenching agent
Oil or water
Tempering
550 to 660 deg C
End quench test
830 ± 5 deg C
Normalizing
820 to 860 deg C
Guidance values except the end quench test temperature, which is binding. Lower quenching temperatures generally for water, upper for oil; austenitizing at least 30 min, tempering at least 60 min (guide values).
Source: EN 10083-1:1991 (UNI EN 10083-1), Table XIII
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