|
50CrMo4
EN
10083-3:2002, Number: 1.7228
|
|
Comparison of
steel grades
|
|
JUS C.B9.021
|
Č.4733
|
|
DIN 17200
|
50CrMo4
|
|
BS
|
(708 M 50)
|
|
GOST
|
(50HMA)
|
|
AISI
|
(4150)
|
|
UNI
|
50CrMo4
|
|
NF
|
50CrMo4, 50CD4
|
Chemical
analysis -% by mass
|
Chemical
elements
|
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
Mo
|
|
%,
by mass
|
0,46
- 0,54
|
£ 0,40
|
0,50
- 0,80
|
max
0.025
|
max
0,035
|
0,90-1,20
|
0,15-0,30
|
|
Permissible
deviation
|
±
0.02
|
±
0,03
|
±
0,04
|
+
0.005
|
+
0.005
|
±
0.05
|
±
0.03
|
Mechanical
properties in the quen ched and tempered condition
|
|
d ≤ 16mm oder t ≤ 8mm
|
16mm < d ≤ 40mm
8mm < t ≤ 20mm
|
40mm < d ≤ 100mm
20mm < t ≤ 60mm
|
100mm < d ≤ 160mm
60mm < t ≤ 100mm
|
160mm < d ≤ 250mm
100mm < t ≤ 160mm
|
|
Re min (MPa)
|
900
|
780
|
700
|
650
|
550
|
|
Rm (MPa)
|
1100-1300
|
1000-1200
|
900-1100
|
850-1000
|
800-950
|
|
A min. (%)
|
9
|
10
|
12
|
13
|
13
|
|
Z min. (%)
|
40
|
45
|
50
|
50
|
50
|
|
KV min. (J)
|
30
|
30
|
30
|
30
|
30
|
Jominy’s
hardenability band
|
Distance in mm
from quenched end Hardness in HRC (mm)
|
|
mm
|
1,5
|
3
|
5
|
7
|
9
|
11
|
13
|
15
|
20
|
25
|
30
|
35
|
40
|
45
|
50
|
|
+H
|
max.
|
65
|
65
|
64
|
64
|
63
|
63
|
63
|
62
|
61
|
60
|
58
|
57
|
55
|
54
|
54
|
|
min.
|
58
|
58
|
57
|
55
|
54
|
53
|
51
|
48
|
45
|
41
|
39
|
38
|
37
|
36
|
36
|
|
+HH*
|
max.
|
65
|
65
|
64
|
64
|
63
|
63
|
63
|
62
|
61
|
60
|
58
|
57
|
55
|
54
|
54
|
|
min.
|
60
|
60
|
59
|
58
|
57
|
56
|
55
|
53
|
50
|
47
|
45
|
44
|
43
|
42
|
42
|
|
+HL*
|
max.
|
63
|
63
|
62
|
61
|
60
|
60
|
59
|
57
|
56
|
54
|
52
|
51
|
49
|
48
|
48
|
|
min.
|
58
|
58
|
57
|
55
|
54
|
53
|
51
|
48
|
45
|
41
|
39
|
38
|
37
|
36
|
36
|
Heat treatment
conditions – informative
|
Hardening
temperature in the end quench test
|
Quenching
temperature
|
Quenching
in
|
Tempering
temperature
|
|
8500±50C
|
820-870
0C
|
Oil
|
540-680
0C
|
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.
|
|
Where the
shearability is of importance, this steel should be ordered in the
‘’soft-annealed’’ condition
|
248
|
|
51CrV4
EN 10083-3:2002, Number: 1.8159
|
|
Comparison of steel grades
|
|
JUS
|
Č.4830
|
|
DIN
|
50CrV4
|
|
BS
|
(735 A 50)
|
|
GOST
|
50HFA, 50HGFA
|
|
AISI
|
(6145, 6150)
|
|
UNI
|
50CrV4
|
|
NF
|
42 CD 4
|
Chemical analysis -% by mass
|
Chemical elements
|
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
V
|
|
%, by mass
|
0,47 - 0,55
|
£ 0,40
|
0,70 - 1,10
|
max 0.025
|
max 0,035
|
0,90-1,20
|
0,10-0,25
|
|
Permissible deviation
|
± 0.02
|
± 0,03
|
± 0,04
|
+ 0.005
|
+ 0.005
|
± 0.05
|
± 0.02
|
Mechanical properties in the quen
ched and tempered condition
|
|
d ≤ 16mm oder
t ≤ 8mm
|
16mm < d ≤ 40mm
8mm < t ≤
20mm
|
40mm < d ≤
100mm
20mm < t ≤
60mm
|
100mm < d
≤ 160mm
60mm < t ≤
100mm
|
160mm < d ≤
250mm
100mm < t
≤ 160mm
|
|
Re min (MPa)
|
900
|
800
|
700
|
650
|
600
|
|
Rm (MPa)
|
1100-1300
|
1000-1200
|
900-1100
|
850-1000
|
800-950
|
|
A min. (%)
|
9
|
10
|
12
|
13
|
13
|
|
Z min. (%)
|
40
|
45
|
50
|
50
|
50
|
|
KV min. (J)
|
30*
|
30*
|
30*
|
30*
|
30*
|
* Preliminary
values
Jominy’s hardenability band
|
Distance in mm from quenched end
Hardness in HRC
(mm)
|
|
mm
|
1,5
|
3
|
5
|
7
|
9
|
11
|
13
|
15
|
20
|
25
|
30
|
35
|
40
|
45
|
50
|
|
+H
|
max.
|
65
|
65
|
64
|
64
|
63
|
63
|
63
|
62
|
62
|
62
|
61
|
60
|
60
|
59
|
59
|
|
min.
|
57
|
56
|
56
|
55
|
53
|
2
|
50
|
48
|
44
|
41
|
37
|
35
|
34
|
33
|
32
|
|
+HH*
|
max.
|
65
|
65
|
64
|
64
|
63
|
63
|
63
|
62
|
62
|
62
|
61
|
60
|
60
|
59
|
59
|
|
min.
|
60
|
59
|
59
|
58
|
56
|
56
|
54
|
53
|
50
|
48
|
45
|
43
|
43
|
42
|
41
|
|
+HL*
|
max.
|
62
|
62
|
61
|
61
|
60
|
59
|
59
|
57
|
56
|
55
|
53
|
52
|
51
|
50
|
49
|
|
min.
|
57
|
56
|
56
|
55
|
53
|
2
|
50
|
48
|
44
|
41
|
37
|
35
|
34
|
33
|
32
|
Heat treatment conditions –
informative
|
Hardening temperature
in the end quench test
|
Quenching temperature
|
Quenching in
|
Tempering temperature
|
|
8500±50C
|
820-880 0C
|
Oil or water
|
540-680 0C
|
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.
|
|
Where the shearability is of
importance, this steel should be ordered in the ‘’soft-annealed’’ condition
|
248
|
|
50CrMo4
EN 10250-3:1999, Number: 1.7228
|
|
Comparison of steel grades
|
|
JUS
|
Č.4733
|
|
DIN
|
50CrMo4, 48CrMo4
|
|
BS
|
708A47
|
|
GOST
|
50HMA
|
|
AISI
|
4150
|
|
UNI
|
50CrMo4
|
|
NF
|
50CrMo4, 50CD4
|
Chemical analysis -% by mass *
|
Chemical elements
|
C
|
Si
|
Mn
|
P
max.
|
S
max.
|
Cr
|
Mo
|
-
|
-
|
|
%, by mass
|
0,46- 0,54
|
£ 0,40
|
0,50 - 0,80
|
0.035
|
0.035
|
0,90 -1,20
|
0,15 – 0,30
|
-
|
|
|
Permissible deviation
|
± 0,02
|
+ 0,03
|
± 0,04
|
+ 0,005
|
+ 0,005
|
± 0,05
|
± 0,03
|
-
|
-
|
* At
the option the manufacturer the elements aluminium, titanium, vanadium and niobium
may be added singly or in combination for grain control
purposes. Elements not quoted in tables shall not be added intentionally to
the steel without the agreement of the purchaser, except for the purpose
of finishing the heat.
Mechanical properties in the
quenched and tempered condition
|
Thickness of ruling
section tR
|
|
Diameter in mm
|
tR ≤
160mm
|
|
160< tR
≤330mm
|
330<tR≤660mm
XX
|
|
Re min
(N/mm2)
|
550
|
|
540
|
490
|
|
Rm min
(N/mm2)
|
800
|
|
750
|
700
|
|
A % min.
|
l-longitudinal
|
13
|
|
14
|
15
|
|
tr - transverse
|
9
|
|
10
|
11
|
|
KV min (J)
|
l-longitudinal
|
25
|
|
20
|
15
|
|
tr - transverse
|
14
|
|
12
|
10
|
1N/mm2=1MPa
XX These properties apply only to a tR ≤
500mm
Heat treatment conditions ****
|
Quenching temperature,
0C
|
Tempering temperature, 0C
|
|
820 to 860
|
540 to 680
|
|
 |
|
|
Zeljezara Niksic - Niksic, Montenegro
Phone: (+382) 20 234-616, (+382) 40 202 900 | Fax: (+382) 40 202-023
 | Website: www.znksteel.com
|
|
