EN 10083-2:2006 C45 Steel: Specifications & Listings
EN 10083-2:2006 C45: A medium carbon steel for quenching and tempering to EN 10083-2:2006 (steel number 1.0503, non alloy quality steel). Supplied as semi-finished products, bars, rod, wide flats, hot rolled strip, sheet and plate, and forgings. 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
<=0.045
<=0.045
<=0.40
Mechanical Properties
Condition
Quenched and tempered (+QT), ruling section d <= 16 mm
Elongation
14% min
Hardness
Soft annealed (+A): 207 HBW max
Tensile Strength
700 to 850 MPa
Yield Strength
490 MPa min
Typical Available Sizes
Round Bar
10mm–250mm dia
Flat Bar
16×5mm–200×50mm
Square Bar
12mm–150mm
Sizes are indicative. Contact seller for exact availability.
More data from EN 10083-2:2006
From the standard
Other composition limitsTable 3 and its notes
Steel number
1.0503
Steel class
Non alloy quality steel (clause 4.1)
Deoxidation
Killed (clause 6.2)
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)
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
490
700 to 850
14
35
16 mm < d <= 40 mm, 8 mm < t <= 20 mm
430
650 to 800
16
40
40 mm < d <= 100 mm, 20 mm < t <= 60 mm
370
630 to 780
17
45
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
340
620
14
16 mm < d <= 100 mm, 16 mm < t <= 100 mm
305
580
16
100 mm < d <= 250 mm, 100 mm < t <= 250 mm
275
560
16
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
207 HBW
Values also apply to the grades with hardenability requirements (+H, +HH, +HL); not applicable to continuously cast slabs not further deformed. Shearability may also be assumed in the untreated condition for dimensions over 80 mm (clause 7.3.3).
Source: EN 10083-2:2006, Table 8
Heat treatmentTable 13
Quenching
820 to 860 deg C
Quenching agent
Water or oil
Tempering
550 to 660 deg C
Normalizing
840 to 900 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).