P20 Plastic Mould Steel Plate Pre-Hardened for Injection Mould Base and Plastic Mould Core

P20 plastic mould steel plate is one of the most widely used pre-hardened mould steels in the global plastic injection mould industry, trusted by manufacturers for its stable performance, balanced hardness, and outstanding machinability. Designed specifically for plastic mould production, this material eliminates the need for additional heat treatment after machining, greatly shortening production cycles and reducing processing costs for mould makers. Whether used for large household appliance moulds, daily necessities moulds, electronic product shells, or automotive interior moulds, P20 plastic mould steel plate provides reliable structural support and consistent performance under long-term working conditions.
Our P20 plastic mould steel plate is produced through strict smelting and rolling processes, ensuring uniform internal structure, minimal internal stress, and excellent stability during machining. The material is supplied in a pre-hardened condition with a stable hardness range of 28–32 HRC, which not only guarantees sufficient strength and wear resistance for plastic moulds but also maintains superior cutting performance, allowing for high-speed milling, drilling, and tapping without excessive tool wear. The fine grain structure of P20 plastic mould steel plate also supports excellent polishing and texturing capabilities, enabling mould surfaces to reach mirror-like finishes when required, ensuring high-quality appearance of plastic products.
In terms of application flexibility, our P20 plastic mould steel plate is available in thicknesses from 10mm to 300mm, supporting various plastic mould structures including mould bases, core pins, cavity inserts, and supporting plates. The steel exhibits good welding performance and stability under moderate temperature conditions, making it suitable for medium-volume plastic production lines. Compared with higher alloy mould steels, P20 offers exceptional cost-effectiveness while meeting the demands of most general-purpose and medium-quality plastic moulds. We provide customized cutting, precision grinding, and milling services to match customer drawings, ensuring that each piece of P20 plastic mould steel plate meets precise dimensional requirements and reduces on-site processing time. By choosing our P20 plastic mould steel plate, mould manufacturers can improve production efficiency, maintain mould precision, and achieve stable, high-quality plastic product forming.