Steel susceptible to loaded parts with a high core strength. Especially for gear wheels and shafts.
TECHNOLOGICAL INFORMATION:
The steel can be welded before carburising, but after pre-heating.
SEMI-FINISHED PRODUCTS:
The steel can be welded before carburising, but after pre-heating.
CHEMICAL COMPOSITION:
C
Mn
Si
P
S
Cr
Ni
Mo
W
V
Ti
Cu
0,17 - 0,23
0,80 - 1,10
0,17 - 0,37
Max 0,035
Max 0,035
1,00 - 1,30
Max 0,30
-
Max 0,20
Max 0,05
0,05 - 0,12
Max 0,30
MECHANICAL PROPERTIES:
Property
Symbol
Unit
Value
Ultimate tensile strength
Rm
MPa
≥ 980
Yield stress
Re (Rp0.2)
MPa
≥ 830
Elongation
A
%
≥ 9
Reduction of area
Z
%
≥ 50
Impact energy
KV
J
≥ 80
Hardness after soft annealing
–
HB
≤ 217
Technological treatment processes:
Technological treatment processes
Possible application
Temperature, °C
Hot forming
Forging
+
1100 – 850
Rolling
+
1100 – 850
Thermochemical treatment
Carburising
+
880 – 950
Carbonitriding
+
860 – 930
Heat treatment
Annealing
Normalising
+
880 – 900
Soft annealing
+
650 – 700
Heat treatment after carburising1)
Core hardening
+
850 – 880
Intermediate annealing
+
660 – 680
Case hardening
+
810 – 830
Tempering
+
150 – 200
1) If possible, hardening has to be performed with the temperature equal or close to the heat treatment temperature
INTERNATIONAL STEEL GRADES:
ISO
CEN
Russia
–
–
–
–
~18ChGT
GOST 4543-71
US
Japan
China
–
–
–
–
–
–
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