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30CrNiMo8
EN 10083-3:2002, Number: 1.6580
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Comparasion ofsteel grades
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JUS C.B9.021
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Č.5432
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DIN 17200
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30CrNiMo8
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BS
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(823M30), S99
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GOST
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-
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AISI
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(A322, 4340)
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UNI
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30NiCrMo8
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NF
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30 CND 8
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Chemical analysis -% by mass
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Chemical elements
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C
|
Si
|
Mn
|
P
|
S
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Cr
|
Mo
|
Ni
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|
% by, mass
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0,26 - 0,34
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£ 0,40
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0,30 - 0,60
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max 0.025
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max 0,035
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1,80-2,20
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0,30-0,50
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1,80-2,20
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|
Permissible deviation
|
± 0.02
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± 0,03
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± 0,04
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+ 0.005
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+ 0.005
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± 0.05
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± 0.03
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± 0.05
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Mechanical properties in the
quenched and tempered condition
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d ≤ 16mm oder
t ≤ 8mm
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16mm < d ≤ 40mm
8mm < t ≤
20mm
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40mm < d ≤
100mm
20mm < t ≤
60mm
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100mm < d
≤ 160mm
60mm < t ≤
100mm
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160mm < d ≤
250mm
100mm < t
≤ 160mm
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Re min (MPa)
|
1050
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1050
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900
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800
|
700
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Rm (MPa)
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1250-1450
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1250-1450
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1000-1300
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1000-1200
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900-1100
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A min. (%)
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9
|
9
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10
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11
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12
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Z min. (%)
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40
|
40
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45
|
50
|
50
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KV min. (J)
|
30
|
30
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35
|
45
|
45
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Jominy’s hardenability band
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Distance in mm from quenched end
Hardness in HRC
(mm)
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|
mm
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1,5
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3
|
5
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7
|
9
|
11
|
13
|
15
|
20
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25
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30
|
35
|
40
|
45
|
50
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+H
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max.
|
56
|
56
|
56
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56
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55
|
55
|
55
|
55
|
55
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54
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54
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54
|
54
|
54
|
54
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min.
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48
|
48
|
48
|
48
|
47
|
47
|
47
|
46
|
46
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45
|
45
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44
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44
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43
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43
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|
+HH*
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max.
|
56
|
56
|
56
|
56
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55
|
55
|
55
|
55
|
55
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54
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54
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54
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54
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54
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54
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min.
|
51
|
51
|
51
|
51
|
50
|
50
|
50
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49
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49
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48
|
48
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47
|
47
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47
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47
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+HL*
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max.
|
53
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53
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53
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53
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52
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52
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52
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52
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52
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51
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51
|
51
|
51
|
50
|
50
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|
min.
|
48
|
48
|
48
|
48
|
47
|
47
|
47
|
46
|
46
|
45
|
45
|
44
|
44
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43
|
43
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Heat treatment conditions –
informative
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Hardening temperature
in the end quench test
|
Quenching temperature
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Quenching in
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Tempering temperature
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|
8500±50C
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830-860 0C
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Oil
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540-660 0C
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Maximum hardness for products to be
supplied in the ’’treated to improve shearability (+S)’’ or
’’soft annealed (+A)’’ condition
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+S
HB max.
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+A
HB max.
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Where the shearability is of
importance, this steel should be ordered in the ‘’soft-annealed’’ condition
|
248
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30CrNiMo8
EN 10250-3:1999, Number: 1.6580
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Comparaison of steel grades
|
|
JUS
|
Ć.5432
|
|
DIN
|
30CrNiMo8
|
|
BS
|
823M30
|
|
GOST
|
-
|
|
AISI
|
A322, 4340
|
|
UNI
|
-
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|
NF
|
30CND8
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Chemical analysis -% by mass*
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Chemical elements
|
C
|
Si
|
Mn
|
P
max.
|
S
max.
|
Cr
|
Mo
|
Ni
|
-
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|
%, by mass
|
0,26- 0,34
|
£ 0,40
|
0,30-0,60
|
0.035
|
0.035
|
1,80-2,20
|
0,30–0,50
|
1,80-2,20
|
|
|
Permissible deviation
|
± 0,02
|
+ 0,03
|
± 0,04
|
+ 0,005
|
+ 0,005
|
± 0,05
|
± 0,03
|
± 0,05
|
-
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* 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
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Thickness of ruling
section tR
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Diameter in mm
|
tR ≤ 160mm
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160< tR
≤330mm
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330<tR≤660mm
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Re min (N/mm2)
|
800
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|
800
|
800
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Rm min
(N/mm2)
|
1000
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|
1000
|
1000
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A % min.
|
l-longitudinal
|
11
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|
11
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11
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tr - transverse
|
8
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8
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8
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KV min (J)
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l-longitudinal
|
45
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45
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45
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tr - transverse
|
22
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22
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22
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1N/mm2=1MPa
Heat treatment conditions ****
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Quenching temperature,
0C
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Tempering temperature, 0C
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865 to 885
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550 to 650
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****
Quenching
from hardening may be carried out in oil, water, or water based solutions. Caution
should be observed in the use of water as a
quenching medium to avoid the risk of cracking the forgings |
