If you manufacture large injection molds for TV housings, automotive dashboards or similar big parts, you've almost certainly run into these issues: uneven through-hardness in thick plates causing costly rework, poor thermal conductivity dragging out cooling cycles, and fast cavity wear cutting short mold service life.
Built to solve exactly these industry-wide pain points, Jinqing Mould Steel is proud to launch SW318H-P – our innovative pre-hardened plastic mold steel. Optimized from metallurgical process to chemical composition, it is purpose-engineered for large cross-section injection molds, helping mold shops reduce costs and injection molders boost efficiency.
4 Key Benefits That Deliver Real Value
Uniform Hardness for Flawless Polishing & Etching
Thanks to multi-directional forging and precision pre-hardening, SW318H-P maintains extremely consistent hardness from surface to core, even in thick plates, with a clean, uniform internal structure.
Whether you need fine leather-grain etching for automotive interiors or mirror polishing for high-gloss appliance housings, it delivers consistent, defect-free results in one go – drastically cutting rework time and post-processing costs.
High Thermal Conductivity to Boost Production Output
Cooling makes up over 60% of a typical injection molding cycle. Poor thermal conductivity in your mold steel is wasted machine capacity.
With an optimized composition, SW318H-P reaches a thermal conductivity of 41.2 W/mK at 20℃. It extracts heat from the cavity faster, reduces cycle time, and increases daily output per machine. For high-volume production, the savings in time and energy add up fast.
Nitriding Compatible for Extended Mold Service Life
For glass-filled resins and long, high-volume production runs, surface hardness is what determines how long your mold stays precise.
SW318H-P is fully compatible with nitriding treatment, which significantly boosts surface hardness and wear resistance. It resists scratching and sticking better, so each mold delivers more parts and lowers your total tooling cost over time.
Pre-hardened & Easy to Machine for Faster Lead Times
Delivered in fully pre-hardened condition, SW318H-P is ready for roughing and finishing right away – no extra heat treatment needed, saving both time and cost.
It also features excellent machinability, reducing tool wear and increasing cutting speeds. Mold shops can shorten manufacturing lead times and deliver customer projects faster.
Rigorous Full-Process Manufacturing for Reliable Quality
Great performance is built on controlled production. SW318H-P is manufactured on a modern metallurgical line with strict quality control at every step: Blast furnace hot metal → 300t LD converter → LF ladle refining → RH vacuum degassing → argon-shielded ingot casting → multi-directional forging → quenching + tempering + pre-hardening → final inspection & warehousing.
