Steel susceptible to large die casting tools, tools needing high strength at elevated temperatures, forged dies, products under a high load, mandrels and extrusion dies.
CHEMICAL COMPOSITION:
C
Si
Mn
P
S
Cr
Mo
W
V
Co
Ni
0,35-0,40
0,30-0,50
0,30-0,50
Max 0,030
Max 0,030
4,80-5,20
2,70-3,20
-
0,40-0,60
-
-
MECHANICAL PROPERTIES:
Hardness after
Temperature ºC
Symbol
Value
Soft annealing
–
HB
≤229
Quenching with 1040 ºC in oil
–
HRC
56
Quenching with 1040 ºC in oil and tempering
(cooling during quenching can be performed gradually in the hot bath at around 500-550 ºC and then cooled in the air)
550
HRC
≥50
350
HRC
52
400
HRC
53
450
HRC
53.5
500
HRC
54
550
HRC
54
600
HRC
51.5
650
HRC
4.,5
PHYSICAL PROPERTIES:
Property
Unit
Value
Density, ρ
g*cm-3
7.82
Thermal expansion, α20-100ºC)
K-1
12.7*10-6
Thermal conductivity, λ20ºC)
W*m-1*K-1
36
Technological treatment processes:
Technological treatment processes
Possible application
Temperature, °C
Hot forming
Forging
+
1050-850
Rolling
+
1050-850
Treatment
Heat treatment
Quenching
+
1030-1070
Tempering
+
500-600
Precipitation strengthening
Supersaturation
–
–
Ageing
–
–
Annealing
Soft anealing
+
800-840
Stress relieving
+
600-700
Thermochemical treatment
Nitriding
+
470-550
Other
–
–
INTERNATIONAL STEEL GRADES:
ISO
CEN
Russia
X38CrMoV5-3
ISO 4957:2004
X38CrMoV5-3
ISO 4957:2004
–
–
US
Japan
China
–
–
–
–
–
–
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