High Manganese Steel Castings for Mining Wear Parts
High manganese steel (Hadfield steel) is the dominant casting material for heavy-impact mining wear parts. Its unique self work-hardening property creates a hard protective surface under repeated rock impact while retaining a tough inner core, resisting cracking and severe abrasive wear in crushers, grinding mills and bulk material handling equipment.
Key Material Advantages
- Work‑hardening characteristic: Surface hardness rises progressively under continuous impact from ore crushing, continuously improves anti-abrasion performance during service.
- Ultra-high impact toughness: Ductile austenitic structure avoids sudden fracture under heavy rock pounding, outperforms brittle high-chrome cast iron for high-shock working conditions.
- Balanced abrasion & shock resistance: Perfect match for mining’s combined impact + abrasive wear environment.
- Good weld & repair performance: On-site build-up welding for partial wear extension of service life and cost saving.
Standard High Manganese Steel Grades
- ZGMn13 / Mn13: Base Hadfield grade for general crusher wear parts
- Mn13Cr2 / ZGMn13‑2: Chromium modified grade, upgraded wear resistance for heavy abrasive ore
- Mn18Cr2: Extra high manganese alloy for ultra-heavy impact large-size mining components
Typical Mining Wear Components from High Manganese Castings
Crusher Wear Parts
- Jaw plates, cheek plates, side liners for jaw crusher
- Mantle, concave bowl liner for cone crusher
- Blow bar, impact liner for impact crusher
- Hammer head for ring hammer crusher
Grinding Mill Parts
- Ball mill liners, lifter bars, partition plates, grate plates
Material Handling Wear Parts
- Excavator bucket teeth & adapters, chute liners, grizzly bars, apron feeder pans
Core Production & Heat Treatment
- Casting method: Resin sand casting for high dimensional precision and low casting defects
- Critical water toughening heat treatment: Quench from high temperature to obtain full austenitic microstructure (key to achieve required toughness and work-hardening performance)
- Strict raw material composition control of Mn, C, Cr and impurity elements
Complete Quality Inspection Items
- Spectrometer chemical composition test
- Metallographic check for qualified austenitic structure
- Hardness & impact mechanical testing
- MT/PT non-destructive flaw detection to eliminate shrinkage, crack and sand inclusion
- Dimensional inspection per customer drawings
Application Fields
Open-pit & underground mines, aggregate quarries, cement plants, sand & gravel processing, mineral concentrators.
Conclusion
High manganese steel castings remain the most cost-effective solution for high-impact mining wear parts. Unique work-hardening feature effectively prolong component service life, reduce frequent spare part replacement and cut mine downtime & maintenance expenditure.