Hot Rolled Prehardening Polish Steel Flat Bar DIN1.2311 / AISI P20 Plastic Injection Mold Steel
Hot Rolled Prehardening Polish Steel Flat Bar DIN1.2311 / AISI P20 Plastic Injection Mold Steel
For high demand large-sized or medium-sized precision plastic mold and alloy parts
1. Applications
It's used for various lager-sized or medium-size precision plastic mould and alloy parts.
A. Ideally suited for the production of plastic moulds.
B. Die holders, zinc die casting dies, backers, bolsters and injection moulds.
C. Shafts, rails and wear strips.
2. Physical Properties of 1.2311 P20 3Cr2Mo
Density: 0.284 lb/in3 (7861 kg/m3)
Specific Gravity: 7.86
Modulus of Elasticity: 30 x 106 psi (207 GPa)
3. Thermal Conductivity
24 Btu/ft/hr/°F
41.5 W/m/°K
Machinability: 60-65% of a 1% carbon steel
4. Mechanical Properties
| Properties | Metric |
| Hardness, Brinell (typical) | 300 |
| Hardness, Rockwell C (typical) | 30 |
| Tensile strength, ultimate | 965-1030 MPa |
| Tensile strength, yield | 827-862 MPa |
| Elongation at break (in 50 mm (2″)) | 20.00% |
| Compressive strength | 862 MPa |
| Charpy impact (V-Notch) | 27.1-33.9 J |
| Poisson’s ratio | 0.27-0.30 |
| Elastic modulus | 190-210 GPa |
5. 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.
6. Equivalent Grades
| GB | DIN | AISI | JIS |
| 3Cr2Mo | 1.2311 | P20 | PDS-3 |
7. Chemical Composition (Wt%)
| Steel Grade | C | Si | Mn | Cr | Mo | S | P |
| 1.2311 | 0.35-0.45 | 0.20-0.40 | 0.60-1.00 | 1.80-2.10 | 0.30-产品管理0.55 | ≤0.003 | ≤0.030 |
| P20 | 0.35-0.45 | 0.20-0.40 | 0.60-1.00 | 1.80-2.10 | 0.30-0.55 | ≤0.003 | ≤0.030 |
| PDS-3 | 0.35-0.45 | 0.20-0.40 | 0.60-1.00 | 1.80-2.10 | 0.30-0.55 | ≤0.003 | ≤0.030 |
8. Available Size (mm)
| Plate Size(mm) | Flat Bar Size(mm) | Round Bar Size(mm) | |||||
| Thickness | Width |
Length |
Thickness | Width | Length | Diameter | Length |
| 10-700 | 1600-2200 | 4000-10000 | 10-700 | 155-2200 | 2000-6000 | 20-200 | 2000-6000 |
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