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C55E
EN 10250-2:1999, Number: 1.1203
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|
Comparison of steel grades
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JUS
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Č.1631
|
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DIN
|
Ck55
|
|
BS
|
(070M55)
|
|
GOST
|
55
|
|
AISI
|
(1055)
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|
UNI
|
|
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NF
|
(XC55H1), XC55
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Chemical analysis -% by mass *
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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
|
0,035
|
0,035
|
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
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|
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
|
-
|
-
|
-
|
-
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|
tr - transverse
|
-
|
-
|
-
|
-
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1N/mm2=1MPa
Mechanical properties in the
quenched and tempered condition
|
Thickness of ruling
section tR
|
|
Diameter in mm
|
tR ≤
70mm
|
70< tR
≤160mm
|
1600< tR
≤330mm
|
|
Re min
(N/mm2)
|
420
|
360
|
330
|
|
Rm min
(N/mm2)
|
700
|
630
|
610
|
|
A % min.
|
l-longitudinal
|
15
|
17
|
16
|
|
tr - transverse
|
-
|
11
|
10
|
|
KV min * (J)
|
l-longitudinal
|
-
|
-
|
-
|
|
tr - transverse
|
-
|
-
|
-
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1N/mm2=1MPa
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
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C55E
EN 10083-2:2002, Number: 1.1203
|
|
Comparison of steel grades
|
|
JUS
|
Č.1631
|
|
DIN
|
Ck55
|
|
BS
|
(070M55)
|
|
GOST
|
55
|
|
AISI
|
(1055)
|
|
UNI
|
-
|
|
NF
|
(XC55H1)
|
Chemical
analysis -% by mass
|
Chemical elements
|
C
|
Si
max.
|
Mn
|
P
max.
|
S1
max.
|
Cr
max.
|
Mo
max.
|
Ni
max.
|
Cr+Mo+Ni
max.
|
|
%, by mass
|
0,52-0,60
|
0,40
|
0,60-0,90
|
0.025
|
0,035
|
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
|
-
|
1
For flat
product, sulfur is restricted to max. 0,010% by mass.
Jominy’s
hardenability band
|
Distance in mm from quenched end
Hardness in HRC
|
|
Symbol
|
mm
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
11
|
13
|
15
|
20
|
25
|
30
|
|
+H
|
max.
|
65
|
64
|
63
|
62
|
60
|
57
|
52
|
45
|
37
|
36
|
35
|
34
|
33
|
32
|
30
|
29
|
|
min.
|
58
|
55
|
47
|
37
|
33
|
32
|
31
|
30
|
29
|
28
|
27
|
26
|
25
|
24
|
22
|
20
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Tentative values for the ’’C’’ scale
Rockwell hardness for special steel grades with restricted
hardenability scatter bands (+HH and
+Hl grades)
|
Symbol
|
Distance in mm from the
quenched end HRC hardness
|
|
1
|
4
|
5
|
|
+HH5
+HH15
+HL5
+HL15
|
-
|
-
|
42 to 60
|
|
60 to 65
|
-
|
42 to 60
|
|
-
|
-
|
33 to 51
|
|
58 to 63
|
-
|
33 to 51
|
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)
|
-
|
-
|
-
|
|
|
|
|
|
|
Mechanical properties in the
normalized condition – (+N)
|
|
Mechanical properties
for products with a diameter (d) or, for flat products trickness (t) of
|
|
d ≤ 16mm t
≤ 16mm
|
16mm < d ≤ 100mm
16mm < t ≤
100mm
|
100mm < d ≤
250mm
100mm < t
≤ 250mm
|
|
Re min.
(MPa)
|
370
|
330
|
300
|
|
Rm min. (MPa)
|
680
|
640
|
620
|
|
A min. (%)
|
11
|
12
|
12
|
|
|
|
|
|
|
Hardness of surface hardened zones
for special steels intended for flame and induction hardening
Heat
treatment conditions
|
Quenching 0C
|
Quenching agent
|
Tempering temperature, 0C
|
Hardening temperature
in the end quench test, 0C
|
Normalizing 0C
|
|
805-840
|
Oil or water
|
550-660
|
8300±5
|
825 to 885
|
|
Related products:
28Mn6 | C10E | C15E, C15C | C15R | C16E | C16R | C22R | C25E | C35E | C35R | C40E | C40R | C45E | C45R | C50E; 2C50 | C50R | C55E | C55R | C60E | C60R |
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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