P20 718H Plastic Mould Steel Round Bar Pre-Hardened for Plastic Mould Ejector Pins and Core Pins

P20 and 718H plastic mould steel round bars are pre-hardened alloy steels specially developed for plastic mould components such as ejector pins, guide pins, support pillars, and small mould inserts. These round bars eliminate the need for post-machining heat treatment, greatly improving production efficiency and reducing deformation risks. P20 plastic mould steel round bar provides stable performance and cost efficiency for general plastic moulds, while 718H plastic mould steel round bar offers higher hardness, better polishing, and improved toughness for high-quality mould applications.
Our P20 and 718H plastic mould steel round bars are manufactured with fine-grain structure and uniform hardness distribution, ensuring excellent machinability, grinding performance, and stability. Available in diameters from 4mm to 200mm, these round bars can be precision turned or centerless ground to achieve tight tolerances required for ejector pins and guide components. The pre-hardened condition maintains consistent hardness throughout the cross-section, preventing inconsistent performance during long-term mould operation. 718H plastic mould steel round bar also supports good texturing and polishing, making it suitable for high-gloss mould components.
In plastic injection mould manufacturing, P20 and 718H plastic mould steel round bars are essential for producing reliable ejector systems, guiding mechanisms, and auxiliary mould parts. Their good wear resistance and toughness ensure smooth operation and long service life, reducing maintenance frequency. We provide customized cutting, precision grinding, and surface finishing services according to customer specifications. For mould makers seeking efficient, stable, and cost-effective pin and insert materials, P20 and 718H plastic mould steel round bars are the ideal choice for reliable performance and simplified production.