Mining & CrushersJaw Crusher
Jaw plate (fixed jaw / swing jaw) – primary and secondary
ASTM A128 Gr B-3 or Gr C. Water quench heat treatment CRITICAL – non-quenched Mn steel is brittle. Work-hardening surface in service: 200–550 HV from ~175 HBW as-cast. Jaw profile: straight, corrugated, or wave per crusher model. Weight: 50–2000 kg each depending on crusher size.
Specifications
Material
Hadfield Manganese Steel (Mn13Cr2): ASTM A128 Gr B-3 (Mn13Cr2); Mn14Cr2; Mn18Cr2 (high abrasion) ; Mn22 (impact-dominant)
Grades
Mn13Cr2;Mn14Cr2;Mn18Cr2;Mn22
Material Class
Hadfield
Applicable Standards
ASTM A128
Service Conditions
abrasionimpact loading
Common Processes
Sand casting (green sand or resin sand for shape); solution anneal (water quench from 1050–1100°C – mandatory to achieve austenite); NO hardness specified ex-foundry – Mn steel work-hardens in service
NDT & Inspection
Chemical analysis (Mn, Cr, C); solution anneal verification (microstructure: fully austenitic, no carbides); MT (not applicable to austenitic Mn – use PT); dimensional (tooth profile, mounting hole geometry); VT; Charpy impact
Typical Specs & Notes
ASTM A128 Gr B-3 or Gr C. Water quench heat treatment CRITICAL – non-quenched Mn steel is brittle. Work-hardening surface in service: 200–550 HV from ~175 HBW as-cast. Jaw profile: straight, corrugated, or wave per crusher model. Weight: 50–2000 kg each depending on crusher size.
⚠ Caveats
Water quench heat treatment CRITICAL – non-quenched Mn steel is brittle.