Guangzhou Changfeng Steel Co., LTD
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Forging P20/ B30PH (Baosteel) Prehardening Corrosion Resistance Plastic Mold Steel
Forging P20 / B30PH (Baosteel) plastic mold steel is a common alloy tool steel which usually supplied in QT condition. It can give an excellent polished finish.It is one of the most widely used for high demand large-sized or medium-sized precision plastic mould and alloy parts. This grade also provides excellent wear resistance.
Features
a, Good hardness uniformity and polishing property,good machining properties.
b, Good integral machanical performance when under high temperature, high Corrosion resistance
c, Good heat-resistance and fatigue-resistance,very high mechanical behavior,cutting mechanical property.
d, Pre-hardened to HRC28-32, can be directly used on mould processing, shorten the construction period.
e, High putity and homogeneous structure of China's biggest ESR production base for its strict requirement in the whole process of exploitation, smelting, vacuum degassing, ESR, forging, annealing, inspection.
Chemical Composition (Wt%)
| Grade | C | Si | Mn | S | P | Cr | Mo |
| P20 | 0.28-0.40 | 0.20-0.80 | 0.60-1.00 | ≤0.030 | ≤0.030 | 1.4-2.00 | 0.30-0.55 |
Available Size(mm)
| Plate | Thickness (mm) | Width (mm) | Length (mm) |
| 220-460 | 2000-2200 | 4000-8000 | |
| Block | Thickness (mm) | Width (mm) | Length (mm) |
| 250-800 | 800-1600 | 2000-6000 |
Recommend Heat Treatment
| Quenching | Tempering | ||||||
| Heating temperature/℃ | Cooling way | Hardness (HRC) | Heating temperature/℃ | Cooling way | Hardness (HRC) | ||
| 850-880 | Oil Cooling | 50-52 | 580-640 | Air Cooling | 28-32 | ||
Applications
a. Plastic molds for injection compressing and injection molding
b. TV cabinets,drum mold of washing machine,etc.
c. Often used in the manufacture of television cabinet, washing machine, refrigerator inner shell, etc
d. Main components of overloading mold
Physical Properties of P20
Density: 0.284 lb/in3 (7861 kg/m3)
Specific Gravity: 7.86
Modulus of Elasticity: 30 x 106 psi (207 GPa)
Thermal Conductivity:
24 Btu/ft/hr/°F
41.5 W/m/°K
Machinability: 60-65% of a 1% carbon steel
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