General-purpose pre-hardened plastic mould steel, suitable for molds used in home appliance and office plastic products such as air conditioner housings, washing machine tubs and panels, and copiers. Injection molds for automotive interior and exterior parts such as bumpers, dashboards, door panels, headlight housing, and rearview mirrors.

Mainly used for manufacturing high-requirement plastic molds, such as large-size molds, precision molds, and long-life molds. It is also suitable for injection molds, extrusion molds, and blow molds for thermoplastic materials.

Improved 2738HH-grade steel with high purity, fine microstructure, and excellent hardness uniformity. Offers significantly enhanced polishability, etching and texturing performance, machinability, weldability, toughness, and thermal conductivity compared to standard 1.2738. Pre-hardened to 38–42 HRC with uniform hardness.