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A granite quarry in the Middle East fitted its Metso C160 jaw crusher with Qirun Mn22Cr2 jaw plates. Service life reached 5 months vs 3.5 months on original plates, cutting changeout frequency by 40%.
Granite is one of the most punishing feeds for a primary jaw crusher: high compressive strength, high silica content and sharp fracture faces that grind the jaw profiles fast. A quarry in the Middle East running a Metso C160 was changing jaw plates every 3.5 months and wanted to stretch that interval without paying original-equipment prices.
For high-impact, highly abrasive feed, we recommend Mn22Cr2 (22% manganese, chromium-alloyed). Compared with standard Mn13:
Mn13 remains the right choice for medium-impact applications like limestone; the extra alloy in Mn22Cr2 pays for itself when the feed is hard and abrasive.
The quarry sent photos and overall dimensions of their worn C160 fixed and swing plates. We drafted the profile, confirmed every dimension with the customer by email, and only then started casting. Both plates shipped together in export-standard wooden crates with rust protection, MTR included.
After 5 months in service the plates are still within the quarry’s acceptable wear limit - roughly 40% longer than their previous changeout interval. At their tonnage, that removes one full changeout per year.
We supply fixed and swing jaw plates for Metso C-series primaries (C80 to C200), Sandvik CJ/JM series, and most Chinese-made jaw crushers (Shanbao PE series, SBM and others). OEM part numbers are welcome for reference.
Trial orders from 1 set are accepted. Send your part number or drawing for a quotation with price, material suggestion and lead time within 24 hours.
Trusted by customers in 30+ countries. Standard lead time 15-30 days.
High manganese steel Mn13, Mn13Cr2, Mn18Cr2 and Mn22Cr2, plus high chrome iron (Cr26) for fine crushing. We select the material based on your abrasive and impact conditions - send your working conditions for a recommendation.
Aftermarket parts fit Metso (HP, GP, C, NP series), Sandvik (CH, CS, H, S series), Symons 2FT-7FT, Terex Pegson, Kleemann, McCloskey, Shanbao, SBM, Telsmith, Minyu, Hazemag and more. Any model can be custom made by drawing or sample.
Yes. Send a drawing (PDF, DWG or CAD) or a used sample. We measure, draft and confirm all dimensions with you before production. OEM part numbers are welcome for reference.
Standard lead time is 15-30 days and samples ship in 7-15 days. MOQ is flexible - trial orders from 1 piece are accepted.
ISO 9001 and SGS certified factory. Every shipment includes a Material Test Report (MTR) with chemical composition and mechanical properties.
Export-standard wooden crates with rust protection. Sea and air freight from Shanghai and Ningbo ports to worldwide destinations.
| Material | Initial Hardness | Best For |
|---|---|---|
| Mn13 (ASTM A128) | HB 200-230 | General crushing with medium impact |
| Mn13Cr2 | HB 210-240 | Standard jaw plates and cone liners |
| Mn18Cr2 | HB 220-250 | High-impact, abrasive feed |
| Mn22Cr2 | HB 230-260 | Severe impact, hard and large rock |
| High Chrome Cr26 | HRC 58-62 | Blow bars, fine crushing of abrasive material |
* High manganese steel work-hardens under impact to 500+ HB at the wearing surface, giving long life in hard-rock crushing.
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