1. Applications:
Die casting tools, forging dies, extrusion tools, cylinders and screws for plastic processing, hot shear knives, hydro forming tools.
2. Chemical composition:
|
Grade |
Standard |
C |
Si |
Mn |
Cr |
Mo |
V |
P、S≤ |
|
H11 |
ASTM |
0.33-0.43 |
0.80-1.20 |
0.20-0.50 |
4.75-5.50 |
1.10-1.60 |
0.30-0.60 |
0.030 |
|
1.2343 |
DIN |
0.33-0.41 |
0.80-1.20 |
0.25-0.50 |
4.80-5.50 |
1.10-1.50 |
0.30-0.50 |
0.03、0.02 |
|
4Cr5MoSiV |
GB |
0.33-0.43 |
0.80-1.20 |
0.20-0.50 |
4.75-5.50 |
1.10-1.60 |
0.30-0.60 |
0.030 |
|
SKD6 |
JIS |
0.32-0.42 |
0.80-1.20 |
≤0.50 |
4.50-5.50 |
1.00-1.50 |
0.30-0.50 |
0.03、0.02 |
3. Mechanical properties:
Hot work steel with excellent toughness combined with high thermal stability, high resistance to thermal shocks, good thermal conductivity, limited water cooling possible. For toughest applications also available in EFS and ESR.
4. Conditions of delivery:
EAF/ESR, forged/hot rolled, black/turned（milled），annealed，HB≤230
According to customer request.
5. Available sizes:
Round Bar: Φ 6-410mm
Flat: 8-160*205-710mm
Plate: 20-400mm*1800-3200mm (Thickness*Width)
Mould: 200*200-1200*1000mm
Length: 3000-12000mm
Mill deliver conditions, or sawing or cutting for customer request.
6. Features：
High thermal strength, hardness， wear resistance and toughness. It is mainly used for tools for extrusion; molds for plastics; tools for cold punching and hot sharing.
7. Physical properties:
|
Thermal expansion coefficient |
10 |
20 |
20-200°C |
20 |
20 |
|
m K |
11.4 |
12.4 |
13.1 |
13.3 |
|
|
Thermal conductivity |
W |
20°C |
|
700°C |
|
|
m K |
25.3 |
27.6 |
30.5 |
|
8. Heat treatment:
|
Soft annealing |
Temperature |
Cooling |
Hardness |
|
750 - 790°C |
furnace |
max. 229 HB |
|
|
|
|||
|
Stress relief annealing |
Temperature |
Cooling |
|
|
600 - 650°C |
furnace |
|
|
|
|
|||
|
Hardening |
Temperature |
Cooling |
Tempering |
|
1000 - 1050°C |
oil, pressure gas (N2), air or hot bath 500 - 550°C |
see tempering diagram |
|
