Jaw Crusher Plates for Mining: Materials, Life and Cost

1.What are  jaw crusher plates ?

In any primary crushing circuit for mining, aggregates, metallurgy or asphalt, the jaw crusher is usually the first machine in the line – and the jaw crusher plates are the core wear parts that take all the impact and abrasion.

• The fixed jaw plate and movable jaw plate form the crushing chamber and compress the rock between them until it fractures.

• They are exposed to continuous high pressure, heavy impact and severe abrasive wear from hard rock, ores and recycled concrete.

• Because they wear the fastest and control downtime, jaw crusher plates usually account for the largest single wear-parts cost in a primary crusher.
  
  

For mine operators, ready-mix concrete producers, steel plants and asphalt plants, optimizing jaw crusher plates is one of the most effective ways to reduce cost per ton and stabilize throughput.

2.Main materials for jaw crusher plates: Mn13, Mn18 and beyond

High-manganese steel is still the most widely used material for jaw crusher plates, with different Mn contents for different applications.

Mn13 (e.g. ZGMn13)

• Typical Mn content around 12–14%; designed for medium-hard materials and general-purpose primary crushing.

• Strong work-hardening: the surface hardens under impact while the core remains tough, making it suitable for limestone, normal aggregates and general recycling.
  
  

Mn18 (e.g. ZGMn18)

• Higher Mn content around 16–19%; made for hard, abrasive rock and challenging mining conditions.

• Offers higher impact and wear resistance than Mn13, making it a better choice for granite, basalt, hard iron ore and high-tonnage mining operations.
  
  

Advanced alloy and composite jaw plates

• For extremely abrasive materials such as high-silica quartzite or certain iron ores, many plants upgrade to alloyed manganese, high-chrome or ceramic-reinforced jaw plates.

• Bimetal and TiC/ceramic inserts provide a very hard wear surface on a tough backing, significantly extending service life without sacrificing overall toughness.
  
  

With the right material selection and heat treatment, mines and plants routinely extend jaw plate life by 30–100% compared with generic parts, directly lowering wear-part budget and downtime.

3.How to choose jaw crusher plates for your application

Different industries run completely different materials through their crushers. That means your jaw crusher plates should never be “one-style-fits-all”.

Mining machinery (hard rock and metal ores)

• Material: hard granite, iron ore, copper ore, high-silica ore – high impact and high abrasion.

• Recommended: Mn18 or alloyed Mn plates, sometimes with ceramic/TiC inserts for extreme wear, combined with deep-chamber, heavy-duty tooth profiles for aggressive biting and high capacity.
  
  

Concrete machinery (aggregates and recycling)

• Material: limestone, river gravel, mixed aggregates, reinforced concrete and demolition waste.

• Recommended: Mn13 or Mn18 depending on abrasiveness, with tooth profiles that balance strong grip on irregular feed and good product shape for concrete and asphalt mixes.
  
  

Metallurgy machinery (sinter and blast furnace feed)

• Material: sinter, sinter cake and furnace charge – large lump size, high impact, harsh dusty environment.

• Recommended: tough high-manganese plates with robust heat treatment to resist cracking and chipping under repeated impact.
  
  

Asphalt machinery (high-quality road aggregates)

• Material: hard basalt, diabase and other high-strength stone with strict shape requirements for hot-mix asphalt.

• Recommended: Mn18 or alloyed plates with optimized quarry-style or corrugated profiles to maintain capacity while controlling flakiness index and fines generation.
  
  

A practical approach is to share your rock type, feed size, target product size, expected throughput and current wear life with a technical team that specializes in jaw crusher plates, so they can match material and tooth profile to your real operating conditions.

4.What defines a truly high-quality jaw crusher plate?

Not all jaw plates are created equal. Beyond the chemistry, the real performance comes from process control across melting, casting, heat treatment and finishing.

• Clean metallurgy: low inclusions and gas porosity, achieved by controlled melting and deoxidation plus spectrometer checks.

• Modern molding process: using advanced molding lines and optimized gating/feeding to ensure dense, crack-free castings with accurate dimensions.

• Precise heat treatment: controlled furnace temperature and holding times to reach the right hardness and microstructure – hard enough to resist wear, tough enough to avoid brittle failure.

• Accurate machining: correct seating dimensions, bolt holes and surface finish simplify installation and give uniform contact between mating surfaces.

• Full traceability: each plate linked to specific heat, batch and inspection records, allowing continuous improvement and problem-solving when needed.
  
  

These factors directly impact how your jaw plates wear in real mines or plants – and whether they fail early or deliver the full planned service life.

5.What information should buyers share when inquiring about jaw crusher plates?

• Crusher brand and model, plus any available drawings or sample photos of the current jaw plates.

• Material type and abrasiveness (e.g. limestone, granite, iron ore, recycled concrete) and approximate hardness if known.

• Current wear life and main failure modes – fast wear, uneven wear, cracking, tooth breakage, packing or plugging, etc.

• Target wear life and allowable shutdown window (for example, increasing from 3 to 6 months between changes).

• Annual consumption volume and whether there is a long‑term contract or multi‑site demand. This helps the manufacturer plan patterns and safety stock.