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P20 mould steel plate
AISI P20 Steel Plate Material is a versatile, low-alloy tool steel that is characterized by good toughness at moderate strength levels. The special purpose mold steel P20 steel plate is commonly used for plastic injection mold cavities and tooling and for die casting dies for zinc. P20 mold steel plate material is typically sold in the pre-hardened condition at a hardness of approximately 300 HBW.
Product Basic Information:
P20 steel chemical composition
| Standard | Grade | C | Si | Mn | P | S | Cr | Mo |
| ASTM A681 | P20 | 0.28～0.40 | 0.2～0.8 | 0.60～1.0 | ≤0.030 | ≤0.030 | 1.4～2.0 | 0.3～0.55 |
| GB/T 9943 | 3Cr2Mo | 0.28～0.40 | 0.2～0.8 | 0.60～1.0 | ≤0.030 | ≤0.030 | 1.4～2.0 | 0.3～0.55 |
| DIN ISO4957 | 1.2311 | 0.35～0.45 | 0.2～0.4 | 1.3～1.6 | ≤0.030 | ≤0.030 | 1.8～2.1 | 0.15～0.25 |
Equivalent Steel Grades
| Country | USA | German | GB/T | JIS |
| Standard | ASTM A681 | DIN EN ISO 4957 | GB/T 1299 | |
| Grades | P20 | 1.2311 | 3Cr2Mo | PDS-3 |
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 |
Thermal Properties
| Properties | Conditions | ||
| T (°C) | Treatment | ||
| Thermal Expansion | 12.8 X 10-6/ºC | 20-425 | – |
Heat Treatment of Tool Steel P20 material
- Stress Relieving
Preheating: Because mold steel P20 steel plate is sold in a pre-hardened condition, hardening heat treatment is not necessary. After machining and intermittently during service, the steel must be thermally stress relieved by heating to 900ºF (482ºC), equalizing and holding for one hour per inch (25.4mm) of thickness, and cooling in air to ambient temperature.
In those rare circumstances where the AISI steel P20 must be re-hardened, the steel must first be annealed prior to hardening.
Disclaimer
The information and data presented herein are typical or average values and are not a guarantee of maximum or minimum values. Applications specifically suggested for material described herein are made solely for the purpose of illustration to enable the reader to make his own evaluation and are not intended as warranties, either express or implied, of fitness for these or other puposes. There is no representation that the recipient of this literature will receive updated editions as the become available.
Packing & Delivery
Packing Details : Export standard package,bundled or be required.
Applications of P20 Steel Plate or Bar
P20 tool steels are used for low temperature applications that include injection molds and die casting dies. Main applications of P20 steel plate and bar:
Plastic moulds, die holder, backers, rames for plastic pressure dies, hydro forming mold tools.bolsters, die holders. Also suitable for other applications such as rails, shafts and wear strips.
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