High Chrome Cast Grinding Balls | Premium Cast Grinding Media for Ball Mills
High Chrome Cast Grinding Balls are core wear-resistant grinding media widely used in mining mineral processing, cement plants, and industrial ball mill grinding systems. Different from forged grinding balls, cast grinding media features ultra-high hardness, uniform alloy structure, excellent abrasion resistance and stable overall performance, which makes it the best solution for fine grinding, high-impact and long-cycle milling conditions.
Zonai high chrome cast grinding balls adopt precision casting technology and strict oil quenching heat treatment process. From raw material proportioning to finished product inspection, every production link is strictly controlled to ensure stable hardness, low breakage rate and long service life for global industrial milling projects.

1. Core Technical Features of Cast Grinding Balls
- Hardness Range: HRC 58-60, consistent surface and core hardness
- Heat Treatment: Professional oil quenched & fully tempered
- Size Tolerance: ±2.5mm precise dimension control
- Breakage Rate: ≤1% under standard milling operation
- Performance: Low wear loss, no peeling, no deformation
2. Standard Chemical Composition
Our high chrome cast grinding balls maintain stable alloy proportion to guarantee outstanding anti-wear and anti-impact performance:
- Chromium: 11% — 14%
- Carbon: 2.0% — 3.5%
- Manganese: Max 1.0%
- Silicon: Max 1.0%
- Molybdenum: Max 0.5%
- Sulfur & Phosphorus: Max 0.06%
3. Available Sizes
Zonai provides full-size cast grinding balls to match different ball mill models:
65mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm Custom sizes are acceptable according to client’s technical requirements.
4. Main Applications of Cast Grinding Media
Mining Industry
Suitable for gold ore, copper ore, iron ore, manganese ore and various non-ferrous metal mineral processing, applicable for both wet grinding and dry grinding ball mills.
Cement Industry
Ideal for raw material grinding and clinker grinding in cement plant ball mills, effectively reducing overall grinding cost.
Other Industrial Grinding
Widely used for chemical materials, industrial minerals, building materials and other abrasive material grinding scenarios.
5. Advantages of Zonai Cast Grinding Balls
Stable Hardness & Uniform Structure
Thanks to professional oil quenching heat treatment, our cast grinding balls maintain consistent hardness from surface to core, avoiding eccentric wear and out-of-round problems.
Ultra Low Breakage Rate
Strict casting process and internal density control effectively reduce ball cracking and breaking during high-speed mill operation.
Long Service Life & Low Operation Cost
High-chrome alloy formula greatly improves wear resistance, reduces frequent replacement frequency and lowers total production cost for mines and cement plants.
Complete Export Support
We can provide TDS, CoA, packing list, commercial invoice and full set export documents. Support neutral packing, OEM service, FOB and CIF global delivery.
6. Global Factory Supply Service
Zonai Grinding Media is a professional grinding media manufacturer in China, focusing on high-quality cast grinding balls, forged grinding balls and grinding rods. We have stable production capacity, strict quality inspection system and mature export experience.
We have served clients from Africa, Europe, Southeast Asia, South America and other regions, providing reliable and cost-effective grinding media solutions for global mining and cement industries.
7. Industrial Applications of High-Density Grinding Media
Our Forged Grinding Balls are designed for the harshest environments:
- Mining Industry: Essential for gold, copper, and iron ore beneficiation.
- Cement Plants: Used in ball mills to grind clinker.
- Power Generation: Ideal for coal pulverizers.
8. Ready to optimize your grinding circuit?
Upgrade to high-quality Cast Steel Grinding Balls from Zonai Grinding. Contact us today for a quotation or a free sample.
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