1. Main application:
For cold work die or punch pin with few impact load and high wear resistance requirements such as coining die, measuring tool.
2. Manufacturers:
Chengcheng Steel, Huangshi, Daye Steel
3. Delivery conditions:
EAF+LF+VD or ESR, hot rolling or forging, black surface or milling
Hardness: annealed, HB217~269
4. General：
High through hardenability, good wear resistance, belong to ledeburite steel
5. Chemical analysis：
|
C
|
Si
|
Mn
|
Cr
|
S P
|
|
2.00~2.30
|
=<0.40
|
=<0.40
|
11.50~13.00
|
=<0.030
|
6. Available sizes:
Round Bar: Φ 6-410mm
Flat: 8-160*205-710mm
Mould: 200*200-1200*1000mm
Length: 3000-6000mm
Mill deliver conditions, or sawing or cutting for customer request.
7. Compared grades, based on usage:
|
Grade
|
Standard
|
C
|
Si
|
Mn
|
Cr
|
W
|
V
|
P、S≤
|
|
D3
|
ASTM
|
2.00-2.35
|
0.10-0.60
|
0.20-0.60
|
11.0-13.5
|
≤1.00
|
≤1.00
|
0.030
|
|
1.2080
|
DIN
|
1.90-2.20
|
0.10-0.60
|
0.20-0.60
|
11.0-13.0
|
/
|
/
|
0.030
|
|
Cr12
|
GB
|
2.00-2.30
|
≤0.40
|
11.5-13.0
|
/
|
/
|
0.030
|
|
|
SKD1
|
JIS
|
1.90-2.20
|
0.10-0.60
|
0.20-0.60
|
11.0-13.0
|
/
|
≤0.30
|
0.030
|
8. Physical properties:
|
Thermal expansion coefficient
|
10-6 m
|
20-100°C
|
20-200°C
|
20-300°C
|
20-400°C
|
|
m K
|
10.8
|
11.6
|
12.3
|
12.5
|
|
|
Thermal conductivity
|
W
|
20°C
|
350°C
|
700°C
|
|
|
m K
|
16.7
|
20.5
|
24.1
|
|
9. Heat treatment:
|
Soft annealing
|
Temperature
|
Cooling
|
Hardness
|
|
800 - 840°C
|
furnace
|
max. 248 HB
|
|
|
|
|||
|
Stress relief annealing
|
Temperature
|
Cooling
|
|
|
600 - 650°C
|
furnace
|
|
|
|
|
|||
|
Hardening
|
Temperature
|
Cooling
|
Tempering
|
|
950 - 980°C
|
oil, pressure gas (N2),
air or hot bath
500 - 550°C
|
see tempering
diagram
|
|
