Steel choice should match the real production plan, not only the lowest starting quote. P20 is often a practical option for general export molds with moderate volume and stable maintenance conditions. H13 becomes more attractive where heat, wear or more aggressive running conditions raise the pressure on inserts and core areas.
S136 enters the discussion when corrosion resistance and polish quality matter more. Buyers working with transparent parts, cosmetic components or resins that create corrosion risk usually need that trade-off reviewed early, because steel choice affects both tooling cost and downstream maintenance strategy.
For export programs, we usually compare resin type, expected annual output, finish class, spare insert expectations and where the tool will run after delivery. The right recommendation is the one that balances launch budget with long-term reliability, not simply the hardest or most expensive steel on the list.
