NAK80 Mirror Polishing Plastic Mould Steel Plate Pre-Hardened for High Precision Plastic Moulds

NAK80 plastic mould steel plate is a top-grade pre-hardened mould material famous for its exceptional mirror polishing performance, uniform hardness, and high dimensional stability, making it indispensable in the production of high-precision plastic moulds. Designed for optical parts, electronic connectors, cosmetic containers, and high-gloss decorative parts, NAK80 plastic mould steel plate can achieve ultra-fine mirror finishes up to #14000 grit without unevenness or pitting, ensuring the production of plastic products with flawless surfaces and precise dimensions. This material eliminates the need for quenching after machining, greatly reducing the risk of deformation and improving overall production efficiency.
Our NAK80 plastic mould steel plate is produced through electroslag remelting technology, which effectively removes impurities and creates a highly pure and uniform internal structure. The fine and evenly distributed carbides enhance both polishing performance and wear resistance, allowing the mould to maintain precision over millions of injection cycles. With a pre-hardened hardness of 37–43 HRC, NAK80 plastic mould steel plate provides excellent rigidity and toughness, preventing chipping or deformation during high-speed machining and continuous production. Its good corrosion resistance also extends service life when processing certain corrosive plastic materials.
Available in thicknesses from 10mm to 200mm, our NAK80 plastic mould steel plate supports a wide variety of precision mould components, including core pins, cavity inserts, ejector sleeves, and mould bases. The material performs exceptionally well in CNC machining, grinding, and EDM processes, allowing for the creation of complex mould geometries with tight tolerances. We provide customized cutting, precision grinding, and stress relief treatment to ensure flatness and stability. For manufacturers focused on high-end plastic moulding, NAK80 plastic mould steel plate remains the optimal choice due to its superior polishability, stability, and long service life, helping businesses produce high-value plastic products with consistent quality.