CPR Material Tool Steel
CPR Material
Ledeburitic 12% chrome steel with increased additions of W-, Mo- and V, high wear resistance, good toughness, high pressure resistance, minimal change in dimension, secondary hardening.
Area of Application
Thread rolling dies, cold extrusion punches, screws, bending tools, hobbing tools, die- and punching tools, calibrating rings, pressure and profiling rolls, drawing tools.
Chemical Composition
Carbon |
Chromium |
Molybdenum |
Vanadium |
Wolfram |
C |
Cr |
Mo |
V |
W |
1,20 |
12,00 |
1,40 |
1,70 |
2,50 |
Heat Treatment
|
|
Temperature |
Cooling |
Hardness |
Soft annealing |
820 - 850°C |
Furnace |
250 HB |
Stress relief annealing |
600 - 650°C |
Furnace |
|
Hardening |
1130 - 1150°C |
oil, pressure gas (N2), air or hot bath 500 - 550°C |
See Tempering Diagram |
Mechanical Properties
Hardness |
58 - 64 |
HRC |
Physical Properties
Coefficient of thermal expansion |
10,6 - 12,0 |
1/K * 10-6 |
Thermal conductivity (20°C) |
22,8 |
W/mK |
Density |
7,85 |
g/cm3 |
