Mn18Cr2 Cone Crusher Bowl Liner: ASTM A128 Grade C Spares

Mn18Cr2 Cone Crusher Bowl Liner: Premium Manganese Wear Parts

The Mn18Cr2 Bowl Liner (Concave) is the stationary crushing surface engineered for high-performance cone crushers. Cast from ASTM A128 Grade C High Manganese Steel, this liner is designed to handle the toughest abrasive feeds, from granite to river gravel. It works in unison with the gyrating Cone Crusher Mantle to create the compression zone necessary for efficient size reduction.

Our Mn18Cr2 liners feature distinct golden-machined seating surfaces, indicating precision CNC finishing for a secure, gap-free fit against the top shell. This attention to dimensional accuracy prevents the liner from spinning during operation, a common failure mode in inferior crusher spares.

Technical Specifications & Material Standards

We adhere to strict chemical and mechanical protocols to ensure consistent wear life. The following specifications define our Mn18Cr2 product line.

Performance Engineering: The Mn18 Advantage

As specialized crusher part suppliers, we choose Mn18Cr2 over standard Mn13 because of its superior work-hardening rate.

Work Hardening Mechanism: Upon impact, the surface lattice structure of the Mn18Cr2 steel transforms. While the initial hardness is a moderate 220 HBW, the surface rapidly hardens to over 500 HBW after just 50 hours of operation. This creates a self-renewing wear-resistant skin while the core remains ductile (tough) to absorb shock without cracking.

Field Diagnosis: The “Concave Ringing” Sign

How do you know if your Bowl Liner is installed correctly? Listen to your crusher.

The Symptom: A hollow “ringing” or “clacking” sound during crushing often indicates that the epoxy backing has failed or was poured incompletely.

The Risk: If the liner is not fully supported by the backing material, it will flex and eventually crack vertically.

The Fix: Always use a high-grade epoxy crusher backing. Ensure the void is filled 100% to dampen vibrations and transfer the load evenly to the top shell.

Supply Chain & Installation Best Practices

We stock a wide range of standard profiles (Fine, Medium, Coarse, Extra Coarse) to suit various aggregate requirements. Our Wear parts are shipped with protective green/blue anti-rust coating and machined surfaces are oiled to prevent corrosion during sea freight.

Expert Engineer’s Note: Matched Replacement

Critical Tip: Never replace a Bowl Liner while leaving a worn Mantle in the machine. A worn mantle has a different profile shape. Mating a new Bowl Liner with a worn Mantle creates an uneven crushing chamber (nip angle issues), which reduces capacity by up to 20% and increases power consumption significantly. Always change them as a set.