EN 10083-1:1996 C45E Steel: Specifications & Listings
EN 10083-1:1996 C45E: A medium carbon special steel for quenching and tempering to EN 10083-1:1991 + A1:1996 (steel number 1.1191), with sulphur max. 0.035%. Supplied as semi-finished products, bars, rod, wide flats, sheet, plate and strip, and forgings (clause 1.1). Quenched and tempered tensile strength 700 to 850 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
0.42-0.50
<=0.40
<=0.63
0.50-0.80
<=0.10
<=0.40
<=0.035
<=0.035
<=0.40
Mechanical Properties
Condition
Quenched and tempered, ruling section d <= 16 mm
Elongation
14% min
Hardness
Soft annealed: 207 HB max
Tensile Strength
700 to 850 MPa
Yield Strength
490 MPa min
More data from EN 10083-1:1996
From the standard
Other composition limitsTable 3 and its notes
Designation as printed
C45E
Steel number
1.1191
Pair grade
C45R 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 3, note 3)
Restricted options
Without hardenability or quenched and tempered or normalized property requirements, the carbon range may be restricted to 0.05% and/or the sum Cr + Mo + Ni to max. 0.45% by agreement (Table 3, note 5)
Elements not quoted in Table 3 are not intentionally added without the purchaser's agreement, other than for finishing the heat. With hardenability requirements, slight deviations within Table 4 are permitted except for carbon, phosphorus and sulphur.
Source: EN 10083-1:1991 + A1:1996 (DIN EN 10083-1:1996-10), Table 3 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
490
700 to 850
14
35
25
16 mm < d <= 40 mm, 8 mm < t <= 20 mm
430
650 to 800
16
40
25
40 mm < d <= 100 mm, 20 mm < t <= 60 mm
370
630 to 780
17
45
25
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 Charpy V-notch test pieces, average of 3 values, no single value below 70% of the minimum average value. Ruling sections as in Annex A. Sizes not listed are not covered by the standard.
Source: EN 10083-1:1991 + A1:1996 (DIN EN 10083-1:1996-10), Table 9
Mechanical properties, normalized3 sizes
Size
Yield strength Re, min (MPa)
Tensile strength Rm, min (MPa)
Elongation A, min (%)
d <= 16 mm, t <= 16 mm
340
620
14
16 mm < d <= 100 mm, 16 mm < t <= 100 mm
305
580
16
100 mm < d <= 250 mm, 100 mm < t <= 150 mm
275
560
16
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 + A1:1996 (DIN EN 10083-1:1996-10), Table 10
Maximum hardness by delivery conditionTable 8
Treated to improve shearability (+S), max
255 HB
Soft annealed (+A), max
207 HB
Values also apply to the grades with hardenability requirements (+H, +HH, +HL); not applicable to continuously cast slabs not further worked. Shearability in the untreated condition may also be assumed for dimensions greater than 80 mm (clause 5.3.2.3).
Source: EN 10083-1:1991 + A1:1996 (DIN EN 10083-1:1996-10), 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
62
61
61
60
57
51
44
37
34
33
32
31
30
29
28
27
Minimum, HRC
55
51
37
30
28
27
26
25
24
23
22
21
20
Applies when ordered as C45E+H. Provisional values for the non alloy steels; a manufacturer whose scatter for the H grade exceeds these limits informs the purchaser at ordering (Table 5, note 1). End quench test at 850 ± 5 deg C (Table 12).
Source: EN 10083-1:1991 + A1:1996 (DIN EN 10083-1:1996-10), Table 5
Tentative values; apply to both the E and R grade. The figure after the symbol gives the distances (mm) at which the limits apply.
Source: EN 10083-1:1991 + A1:1996 (DIN EN 10083-1:1996-10), Table 6
Heat treatmentTable 12
Quenching
820 to 860 deg C
Quenching agent
Water or oil
Tempering
550 to 660 deg C
End quench test
850 ± 5 deg C
Normalizing
840 to 880 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 + A1:1996 (DIN EN 10083-1:1996-10), Table 12
Active EN 10083-1:1996 C45E Listings on M-EX (For Sale)