One Material, One Optimal Solution
When it comes to crushing, the material you process dictates everything – from the type of wear parts you need to their expected lifespan. Granite demands impact-resistant manganese steel; limestone benefits from high-chrome alloys; iron ore requires a balance of hardness and toughness.
At Duma Machinery, we don't believe in one-size-fits-all. With our 42,000㎡ in-house foundry, metallurgical laboratory, and 4,000+ patterns covering global brands, we engineer wear parts that match your specific material characteristics. Whether you are crushing hard granite, abrasive quartz, or recycling concrete, we help you extend wear life, reduce downtime, and lower your cost per ton.
The secret to Duma's success lies in our understanding of Austenitic Manganese Steel. When crushing hard materials like Granite, the impact triggers a molecular transformation on the surface of our liners, increasing hardness from HB200 to over HB500, while the core remains tough to absorb shocks. Without the right material-to-ore match, you risk either premature cracking or rapid abrasive wear.
Below is a guide to selecting the right crusher wear parts based on the material you process. Each recommendation is backed by our metallurgical expertise and strict quality control.
Granite & Basalt
Hardness: Very high (7–8 Mohs)
Material Characteristics: Highly abrasive, strong impact
Recommended Wear Parts: Manganese steel (Mn18, Mn22), especially for jaw crusher plates and cone crusher mantles/concaves
Why Duma:
Our high-manganese steel undergoes controlled water quenching to achieve a pure austenite structure, ensuring maximum work hardening under impact.
For extra‑heavy duty, we offer Mn22 with chromium addition to further improve wear resistance without sacrificing toughness.
Compatible with Metso C Series and Sandvik CJ Series jaw crushers, our Mn18Cr2 liners are the gold standard for basalt processing.
Limestone & Dolomite
Hardness: Medium–low (3–4 Mohs)
Material Characteristics: Abrasive but less impact
Recommended Wear Parts: High chrome iron (blow bars, impact plates, and liners)
Why Duma:
High chrome iron delivers excellent abrasion resistance with hardness up to 60–65 HRC.
Our custom formulations can be optimized for your specific feed size and throughput, extending service life by 20–40% compared to standard parts.
Iron Ore & Ferrous Ores
Hardness: High, with extreme abrasiveness
Material Characteristics: High impact, severe abrasion
Recommended Wear Parts: Alloyed manganese steel (Mn18Cr2) or specially formulated alloy steel
Why Duma:
We analyze your ore's silica content and feed size to select the best alloy. Mn18Cr2 provides extra hardness while maintaining toughness against large lumps.
Our full traceability ensures every batch's chemistry and heat treatment are recorded, so you can rely on consistent performance.For massive iron ore operations, we provide full technical dossiers including heat treatment curves and metallographic reports for every batch, ensuring no unexpected downtime.
River Gravel & Pebbles
Hardness: High (7 Mohs)
Material Characteristics: Round, high impact force
Recommended Wear Parts: Manganese steel (Mn18) with optimized tooth profile
Why Duma:
Smooth pebbles create intense point loads. Our tooth profile design improves material gripping and reduces slippage, enhancing crushing efficiency.
We use precision machining to guarantee perfect fit, eliminating field grinding and reducing installation time.
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Quartz & Silica
Hardness: Extremely high (7+ Mohs), highly abrasive
Material Characteristics: Severe abrasion, low impact
Recommended Wear Parts: High chrome iron or TiC (Titanium Carbide) embedded wear parts
Why Duma:
For quartz, standard manganese steel wears too quickly. Our high chrome iron offers 3–5 times longer wear life.
For the most demanding applications, we offer TiC‑reinforced wear parts, where ceramic particles are embedded in the working surface to resist abrasion.
Concrete & Asphalt Recycling
Hardness: Medium, but contains rebar
Material Characteristics: Contains steel, risk of cracking
Recommended Wear Parts: High chrome iron with improved toughness or manganese steel for larger chunks
Why Duma:
We understand recycling challenges. Our blow bars are designed to withstand occasional tramp iron without catastrophic failure.
We also offer reverse engineering for obsolete or custom recycling equipment.
Copper & Gold Ore
Hardness: Medium–high (depending on host rock, typically 5–7 Mohs)
Material Characteristics: Moderate to high abrasion, variable impact, often processed in large tonnage operations
Recommended Wear Parts: Manganese steel (Mn18, Mn18Cr2) for cone crusher mantles and concaves; alloy steel for high‑stress applications
Coal & Coke
Hardness: Low (1–3 Mohs), but highly abrasive in some forms
Material Characteristics: Low impact, moderate abrasion, often processed in high‑throughput systems
Recommended Wear Parts: Manganese steel (Mn13) for hammers and liners; or cost‑optimized alloy steel for less demanding sections
Why Duma
Coal preparation requires wear parts that balance abrasion resistance with cost efficiency. Our Mn13 delivers reliable performance with excellent value.
For coke handling where impact is minimal but abrasion is present, we recommend medium chrome iron or abrasion‑resistant alloy steel to extend service life between change‑outs.
We also offer customized designs for hammer crushers and roll crushers used in coal processing, ensuring consistent particle size and reduced downtime.
Steps of Cooperation
Step 1: Analyze your feed. (Is it abrasive or high-impact?)
Step 2: Check your crusher model. (Duma supports 4,000+ patterns including Terex, Trio, and Kleemann.)
Step 3: Consult our engineers. (We offer wear analysis and custom tooth profile design.)
FAQ
Q: How do I know if I need Mn18 or Mn22?
A: If your material has a Mohs hardness above 7 or is extremely abrasive, Mn22 provides a higher wear reserve and longer service life.
Q: Can Duma produce parts for obsolete crusher models?
A: Yes, through our Reverse Engineering service, we can create precise 3D models from your worn samples or old drawings.
Q: What is the typical lead time for custom material orders?
A: Standard stock items ship in 7-10 days, while custom alloy castings typically require 35-45 days.