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C55
EN
10250-2:1999, Number: 1.0535
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Comparison of
steel grades
|
|
JUS
|
Č.1630
|
|
DIN
|
C55
|
|
BS
|
070M55
|
|
GOST
|
55
|
|
AISI
|
1055
|
|
UNI
|
C55
|
|
NF
|
(AF70C55),
IC55
|
Chemical
analysis -% by mass*
|
Chemical
elements
|
C
|
Si
max.
|
Mn
|
P
max.
|
S
max.
|
Cr
max.
|
Mo
max.
|
Ni
max.
|
Cr+Mo+Ni
max.
|
|
|
%,
by mass
|
0,52-0,60
|
0,40
|
0,60-0,90
|
0,045
|
0,045
|
0,40
|
0,10
|
0,40
|
0,63
|
-
|
|
Permissible
deviation
|
±
0,02
|
+
0,03
|
±
0,04
|
+
0,005
|
+
0,005
|
+
0,05
|
+
0,03
|
+
0,05
|
|
-
|
*At the option of the manufacturer the elements
aluminium, titanium, vanadium and niobium may be added singly or in combination
for grain size control
purposes. Elements not quoted in table shall not be
added to the steel without the agreement of the purchaser, except
for the purpose of finishing the heat.
Mechanical
properties in the normalized and normalized and tempered conditions
|
Thickness
of ruling section tR
|
|
Diameter in mm
|
tR
≤ 100mm
|
100<
tR ≤250mm
|
250<
tR ≤500mm
|
500<
tR ≤1000mm
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|
Re
min (N/mm2)
|
330
|
330
|
260
|
250
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|
Rm
min (N/mm2)
|
640
|
620
|
600
|
590
|
|
A
% min.
|
l-longitudinal
|
12
|
12
|
12
|
11
|
|
tr - transverse
|
-
|
9
|
9
|
8
|
|
KV
min * (J)
|
l-longitudinal
|
-
|
-
|
-
|
-
|
|
tr - transverse
|
-
|
-
|
-
|
-
|
1N/mm2=1MPa
Maksimim
hardness for forgings to be supplied in the annealed condition
Heat treatment
conditions
|
Quenching
Temperature,
0C
|
Cooling
medium
|
Tempering
Temperature,
0C
|
Normalizing
temperature, 0C
|
|
805
to 845
|
Oil
or water
|
550
to 660
|
825
to 865
|
|
C55
EN 10083-2:2002, Number: 1.0535
|
|
Comparison of steel grades
|
|
JUS
|
Č.1630
|
|
DIN
|
C55
|
|
BS
|
070M55, (EN9)
|
|
GOST
|
55
|
|
AISI
|
1055
|
|
UNI
|
C55, 1C55
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|
NF
|
(AF70C55), 1C55
|
Chemical analysis -% by mass
|
Chemical elements
|
C
|
Si
max.
|
Mn
|
P
max.
|
S
max.
|
Cr
max.
|
Mo
max.
|
Ni
max.
|
Cr+Mo+Ni
max.
|
|
%, by mass
|
0,52-0,60
|
0,40
|
0,60-0,90
|
0.045
|
0,045
|
0,40
|
0,10
|
0,40
|
0,63
|
|
Permisible deviation
|
± 0.02
|
+ 0,03
|
± 0,04
|
+ 0.005
|
+ 0.005
|
+0,05
|
+0,03
|
+0,05
|
-
|
Maximum hardness for products to be
supplied in the ’’treated to improve shearability (+S)’’ or
’’soft annealed (+A)’’ condition
|
+S
HB max.
|
+A
HB max.
|
|
255
|
229
|
Mechanical properties in the
quenched and tempered condition (+QT) )
|
|
Mechanical properties
for the ruling sections (see prEN10083-1:2002, Annex A) with a diameter (d)
or for flat products trickness (t) of
|
|
d ≤ 16mm t
≤ 8mm
|
16mm < d ≤
40mm
8mm < t ≤
20mm
|
40mm < d ≤
100mm
20mm < t ≤
60mm
|
|
Re min
(MPa)
|
550
|
490
|
420
|
|
Rm (MPa)
|
800-950
|
750-900
|
700-850
|
|
A min. (%)
|
12
|
14
|
15
|
|
Z min. (%)
|
30
|
35
|
40
|
|
KV min. (J)
|
-
|
-
|
-
|
|
|
|
|
|
|
Re:Upper yield strenght or, if on yield phenomenos occurs, the 0,2%
proof strenght Rρ0,2.
Rm: Tensile strenght
Mechanical properties in the
normalized condition – (+N)
|
|
Mechanical properties
for products with a diameter (d) or, for flat products, a trickness (t) of
|
|
d ≤ 16mm t
≤ 16mm
|
16mm < d ≤
100mm
16mm < t ≤
100mm
|
100mm < d ≤
250mm
100mm < t
≤ 250mm
|
|
Re min.
(MPa)
|
370
|
300
|
300
|
|
Rm min. (MPa)
|
680
|
640
|
620
|
|
A min. (%)
|
11
|
12
|
12
|
|
|
|
|
|
|
Heat treatment conditions
|
Quenching, 0C
|
Quenching agent
|
Tempering, 0C
|
Normalizing, 0C
|
|
805-845
|
Water or oil
Oil or water
|
550-660
|
825 to 885
|
|
Related products:
- | C22 | C25 | C30 | C35 | C40 | C45 | C50 | C55 | C60 | S235J2G3, Fe360D1 | S235JRG2, Fe360B | S355J2G3 |
Zeljezara Niksic has more than fifty year long tradition as a manufacturer of high quality carbon, non alloy and alloy steel grades. It is an Electric Arc Furnace steelmaker with significant downstream processing options. It has been one of the leading European steel and special steel producers. Its products meet the following standards EN 10027-1, En 10027-2, DIN, JUS, AISI, BS, AFNOR, GOST, UNI. They are exported to most European countries and worldwide.
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Zeljezara Niksic - Niksic, Montenegro
Phone: (+382) 20 234-616, (+382) 40 202 900 | Fax: (+382) 40 202-023
 | Website: www.znksteel.com
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