Characteristics of P20 Plastic Die Steel Plate
1. Pre-hardened Treatment, No Additional Heat Treatment Required
Factory Hardness Range: P20 steel plates typically undergo pre-hardening treatment before delivery, with a hardness range of HRC 28–34 (some sources cite HRC 30–42). They can be directly used for mold machining without additional heat treatment.
Advantages: Shortens mold manufacturing cycles, reduces production costs, and avoids deformation or cracking risks caused by heat treatment.
2. High Hardness and Wear Resistance
Performance: Pre-hardening treatment endows P20 steel plates with high hardness and wear resistance, enabling them to withstand abrasion during mold use.
Applications: Suitable for long-term production of high-quality plastic molds, such as those for TV casings, washing machines, refrigerator interiors, and other plastic products.
3. Excellent Toughness and Impact Resistance
Performance: P20 steel plates exhibit high impact toughness and ductility, enabling them to absorb significant impact forces without brittle fracture.
Advantages: Their high strength and impact resistance perfectly meet the stringent material requirements for die-casting low-melting-point metals (e.g., tin, zinc, lead).
4. Superior Machinability
Cutting Performance: P20 steel plates are easy to cut, drill, mill, and machine, meeting complex machining demands in mold manufacturing.
Polishing Performance: Their smooth surface facilitates polishing, achieving high-quality mold surfaces for precision molds.
Dimensional Stability: Minimal dimensional changes during heat treatment ensure mold accuracy and stability.
