EN 10083-2:2006 C60E Steel: Specifications & Listings
EN 10083-2:2006 C60E: A higher carbon steel for quenching and tempering to EN 10083-2:2006 (steel number 1.1221, non alloy special steel), 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 1 000 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
<=0.030
<=0.035
<=0.40
Mechanical Properties
Condition
Quenched and tempered (+QT), ruling section d <= 16 mm
Elongation
11% min
Hardness
Soft annealed (+A): 241 HBW max
Tensile Strength
850 to 1 000 MPa
Yield Strength
580 MPa min
More data from EN 10083-2:2006
From the standard
Other composition limitsTable 3 and its notes
Steel number
1.1221
Steel class
Non alloy special steel (clause 4.1)
Pair grade
C60R (1.1223) has the same limits except sulphur, controlled 0.020 to 0.040
Deoxidation
Killed (clause 6.2)
Sulphur, flat products
May be restricted to max. 0.010 if agreed at enquiry and order (Table 3, footnote e)
Improved machinability
Sulphur up to about 0.10 may be supplied on request; the manganese upper limit may then rise by 0.15 (Table 3, footnote c)
Restricted options
Without hardenability or mechanical property requirements, a carbon range of 0.05 and/or Cr + Mo + Ni max. 0.45 may be agreed (Table 3, footnote d)
Elements not quoted in Table 3 are not intentionally added without the purchaser's agreement, other than for finishing the heat.
Source: EN 10083-2:2006, Table 3 and its notes
Mechanical properties, quenched and tempered (+QT)3 sections
Ruling section
Yield strength Re, min (MPa)
Tensile strength Rm (MPa)
Elongation A, min (%)
Reduction of area Z, min (%)
d <= 16 mm, t <= 8 mm
580
850 to 1 000
11
25
16 mm < d <= 40 mm, 8 mm < t <= 20 mm
520
800 to 950
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. Ruling sections as in EN 10083-1:2006, Annex A.
Source: EN 10083-2:2006, Table 9
Mechanical properties, normalized (+N)3 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
For plates over 10 mm and bars over 100 mm diameter a hardness test may be agreed instead of the tensile test, converted to tensile strength according to EN ISO 18265 (clause 7.1.4).
Source: EN 10083-2:2006, Table 10
Maximum hardness by delivery conditionTable 8
Treated to improve shearability (+S), max
255 HBW
Soft annealed (+A), max
241 HBW
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 10083-2:2006, Table 8
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 with the symbol +H; otherwise for guidance only. End quench test to EN ISO 642, quenching from 830 ± 5 deg C (Table 13).
Source: EN 10083-2:2006, Table 5
Restricted hardenability (+HH)Table 6
Symbol
1 mm (HRC)
5 mm (HRC)
+HH5
-
44 to 62
+HH15
62 to 67
44 to 62
Table 6 lists +HH grades under the E grade and +HL grades under the R grade. The figure after the symbol gives the distances (mm) at which the limits apply.
Source: EN 10083-2:2006, Table 6
Heat treatmentTable 13
Quenching
810 to 850 deg C
Quenching agent
Oil or water
Tempering
550 to 660 deg C
End quench test
830 ± 5 deg C
Normalizing
820 to 880 deg C
Guidance values except the end quench test temperature, which is mandatory. Lower quenching temperatures generally for water, upper for oil; austenitizing at least 30 min, tempering at least 60 min (guide values).
Source: EN 10083-2:2006, Table 13
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