Matched by chemical composition and mechanical properties, not a formal equivalence claim. Always verify against the applicable standard before substitution.
Chemical Composition (%)
C
Si
Mn
P
S
Cr
0.12-0.17
<=1.00
<=1.00
<=0.040
<=0.015
12.0-14.0
Mechanical Properties
Tensile Strength
<=650 MPa
Elongation
>=20%
Hardness
<=200 HB
Condition
Annealed (+A), cold rolled strip, up to 8 mm thick
More data from EN 10088-2:2014
From the standard
Mechanical properties by condition4 conditions
Product form
Max thickness (mm)
Condition
Rp0.2 min (MPa)
Rm (MPa)
A80 min, under 3 mm thick (%)
A min, 3 mm and over (%)
Cold rolled strip
8
+A
-
max. 650
20
20
Hot rolled strip
13.5
+A
-
max. 650
20
20
Hot rolled plate
75
+QT550
400
550 to 750
15
15
Hot rolled plate
75
+QT650
450
650 to 850
12
12
+A = annealed, +QT = quenched and tempered.
Source: EN 10088-2:2014, Table 10
Hardness by condition2 rows
Product form
Max thickness (mm)
Condition
HRB, max
HBW or HV, max
HRC
HV
Cold rolled strip
8
+A
90
200
-
-
Hot rolled strip
13.5
+A
90
200
-
-
Hardness is normally determined on strip in condition +A.
Source: EN 10088-2:2014, Table 10
Impact energy KV2 (ISO-V)3 rows
Product form
Max thickness (mm)
Condition
KV2 min (J)
Hot rolled plate
75
+A
by agreement
Hot rolled plate
75
+QT550
by agreement
Hot rolled plate
75
+QT650
by agreement
Applies to products more than 10 mm thick, ISO-V notch.
Source: EN 10088-2:2014, Table 10
Proof strength at elevated temperature7 temperatures
Temperature (deg C)
Rp0.2 min, +QT650 (MPa)
100
420
150
410
200
400
250
385
300
365
350
335
400
305
Minimum values.
Source: EN 10088-2:2014, Table 15
Hot forming and heat treatment3 conditions
Condition
Annealing temperature (deg C)
Quenching temperature (deg C)
Quenching medium
Tempering temperature (deg C)
+A
750 to 810
-
-
-
+QT550
-
950 to 1050
oil, air
700 to 780
+QT650
-
950 to 1050
oil, air
660 to 700
Hot forming 1100 to 800 deg C, cooling: air. Informative guideline.
Source: EN 10088-2:2014, Table A.4
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