Key Characteristics and Advantages of Ultra-Hard Moving Jaw Plates
1. Hardness and Wear Resistance
Standard carbon steel jaw plates: HRC 20–30; ultra-hard high-manganese variants after impact hardening: HRC 50–58; high-chromium composite variants: HRC 58–65.
Our products offer a service life 3–6 times that of standard cast steel jaw plates (as verified by experiments on lead-zinc ore), whilst significantly reducing wear during the crushing of high-hardness materials such as granite, basalt and steel slag.
2. Structural Design Advantages (as shown in the accompanying images)
Wavy serrated tooth profile: The concave-convex tooth surfaces compress and bend the material, increasing crushing efficiency by over 20 per cent and ensuring uniform output particle size; the thickened tooth roots prevent chipping under load.
Rear Reinforcing Ribs + Thickened Base Plate: The square-pattern reinforcing ribs on the rear disperse compressive impact forces, preventing deformation or cracking even under machine vibration; the ultra-hard base plate is 15%–30% thicker than the standard version.
Precision-Fitted Bolt Holes: Bolt holes are precision-machined on a machine tool after casting, ensuring a tight fit during assembly, preventing loosening during operation and avoiding wear on the moving jaw base.
Multiple tooth profiles available: coarse crushing (large teeth), fine crushing (dense teeth) and flat teeth, to suit different feed sizes and output requirements.
3. Advantages in Adapting to Operating Conditions
Impact-resistant and crack-proof: High-manganese material undergoes automatic work hardening upon impact, becoming harder with each impact; the composite version combines soft and hard materials, ensuring that even large chunks of ore do not fracture entirely upon violent impact, thereby avoiding the risk of equipment jamming.
Suitable for all types of hard materials: Specifically designed for highly abrasive materials such as granite, river pebbles, basalt, iron ore, construction waste and cement clinker.
Cost reduction and efficiency improvement: Replacement cycles are extended by 3 to 5 times, reducing downtime for disassembly and assembly whilst enhancing the continuous production capacity of the production line; reduced wear on the jaw body base and bolts leads to lower overall operational and maintenance costs.
Heat and corrosion resistance: Hardness degradation is slow even under continuous high-temperature crushing conditions; resistant to mineral slurry and mild acid-alkali corrosion; unlikely to rust or fail even after long-term use in damp sand and gravel plants.
4. Key differences compared to standard jaw plates
Standard carbon steel: Prone to wear; becomes unusable within 1–2 weeks; crushing efficiency plummets as the tooth surface wears down rapidly;
Standard chromium-free high-manganese: Insufficient hardness; wears rapidly when crushing hard rock;
Ultra-hard chromium-added high-manganese / high-chromium composite: Combines toughness with ultra-high hardness, offering wear resistance, fracture resistance and a long service life; the standard choice for heavy-duty mining applications.
5. Compatible Equipment Models
PE150×250, PE250×400, PE400×600, PE500×750, PE600×900, PE750×1060, PE900×1200 – the full range of jaw crushers; jaw crushers for mobile crushing plants can also be customised.
Our company specialises in high-chromium composite super-hard jaw plates (for fine crushing and high-wear applications)
Wear-resistant layer on the working surface: Cr 22–26 (high-chromium cast iron, composite with a high-manganese steel substrate):
Wear-resistant layer: C 2.0–3.0 per cent, Cr 23–27 per cent, Mo 1.0–2.0 per cent
Substrate: Mn13 high-manganese steel, ensuring overall toughness and preventing brittle fracture
High-manganese super-hard moving jaw plate (mainstream coarse crushing type: Mn13Cr2)
Complies with Chinese National Standard GB/T 5680
C: 1.0–1.4%
Mn: 12.0–15.0%
Cr: 1.5–2.5%, Si: 0.3–0.9%
S ≤ 0.05%, P ≤ 0.07%
Trace Mo: 0.2–0.4%, refines the microstructure and enhances resistance to impact fracture
