Performance Characteristics:
Air-cooled hardening hot work die steel. good toughness, thermal fatigue resistance and abrasion resistance, and high hardenability.
Applications:
hot extrusion moulds and mandrels, forging mould of die-casting hammer; high-speed precision forging mould with inserts; die forging presses mould as well aluminum alloy die-casting mould, etc.
Chemical Composition(%)
|
Standard
|
Steel Grade
|
C
|
Si
|
Mn
|
P
|
S
|
Cr
|
Mo
|
V
|
other
|
|
DIN
|
1.2344
|
0.37-0.42
|
0.90-1.20
|
0.30-0.50
|
0.030
|
0.030
|
4.80-5.50
|
1.20-1.50
|
0.90-1.00
|
|
|
ASTM
|
H13
|
0.32-0.45
|
0.80-1.20
|
0.20-0.50
|
0.030
|
0.030
|
4.75-5.50
|
1.10-1.75
|
0.80-1.20
|
|
|
GB
|
4Cr5MoSiV1
|
0.32-0.45
|
0.80-1.20
|
0.20-0.50
|
0.030
|
0.030
|
4.75-5.50
|
1.10-1.75
|
0.80-1.20
|
|
Process:
EAF+LF+VD+ESR+ Forged+ Annealed+Grinded/Machined
Annealed: 860-890°C, hardness ≤229HB
Quenching: 1020-1050°C, oil cooling or air cooling
Tempering: 560-580°C, hardness: 47-49HRC, twice tempering
Surface condition: black , grinded or machined/ turned.
Inspection: ultrasonic test, according to SEP1921 D/d or as your requirements.