AR27 Wet-End Set significantly improves wear life for Metso MDM 300 Mill Discharge
The Metso MDM 300 mill discharge pump’s full wet-end set, which is supplied by Element in AR27 high-chrome alloy, extended wear life by 15-20% over OEM parts for an iron ore operation.
Case Summary
| Location | Asia |
| Ore Type | Iron ore |
| Equipment Models | Metso MDM 300 Mill Discharge Pump |
| Part Supplied | Full wet-end set: impeller, casing, inlet liner, back liner |
| Material | High-chrome white cast iron AR27 |
| Wear Mechanism | Abrasive wear |
| Wear Life Achieved | 15 – 20% in overall wet-end parts vs. OEM parts |
Challenge.
Frequent downtime was being driven by a short inlet liner lifespan, with wet-end parts requiring early replacement. The customer had been running OEM wet-end parts and was looking to move away from them due to the cost and lead time, rather than a performance failure with the OEM parts themselves.
Our solution.
After analyzing the customer’s application, Element supplied a full wet-end set including impeller, casing, inlet liner, and back liner in the AR27 high-chrome white cast alloy, engineered for greater hardness and wear resistance under sustained abrasive duty.
Material verification for the supplied grade:
- Carbide content: >22%
- Hardness: 60 HRC (standard value for this grade)
- Heat treatment: high-temperature heat treatment
- Microstructure: martensitic matrix with Fe/ Cr carbides and austenite
Results.
- 15-20% longer wear life than OEM parts previously in use, which meant fewer changeouts over the same operating period.
- Lower OPEX, driven by needing fewer replacement sets than the OEM alternative required.
- Reduced unplanned downtime. Maintenance can now be scheduled in advance, replacing the early, unplanned replacements that OEM parts required.