Start with three inputs
- Impact severity: primary shocks & unknowns → tougher matrices (Manganese or Martensitic).
- Abrasiveness & cleanliness: high silica, screened feeds → harder matrices (High Chrome families).
- Tramp-metal risk: if steel is frequent, avoid brittle white-iron families; favor Mn or Martensitic.
Material short-list by duty
- Primary / variable feed / rebar present: Manganese → Mn + TiC if edges round too quickly.
- Recycling / mixed demolition: Martensitic for balance; add ceramic inserts when feed is screened.
- Clean, abrasive secondary: High Chrome → High Chrome + Ceramic for longest edge retention.
Operational tuning still matters
Rotor speed affects fines and wear; S1/S2 gaps shift load and gradation. Change in small steps and log tons-to-change-out.
Tip: In clean, low-shock applications, ceramic or TiC reinforcement often yields 2–4× longer life versus mono-alloys.
