1. Introduction

Our High-Chrome Cast Steel Grinding Balls are a critical consumable for ball mills and SAG mills. They are produced through a controlled sand-casting or metal mold casting process, followed by precise heat treatment. This results in a uniform microstructure that balances high surface hardness with a tough core, effectively resisting abrasion, deformation, and breakage. Available in a comprehensive size range from 15mm to 130mm to suit various grinding stages—from coarse crushing to fine grinding.

2. Key points of our advantages 

· Superior Wear Resistance: High chrome content (typically 10%-18%) forms hard chromium carbides, drastically reducing wear rate and media consumption compared to forged or low-chrome alternatives.

· Consistent Hardness & Microstructure: Advanced casting and quenching processes ensure uniform hardness throughout the ball, providing stable grinding performance over its entire lifecycle.

· High Impact Toughness: The optimized alloy composition and heat treatment prevent catastrophic cracking and spalling, even under severe milling conditions, ensuring operational safety and continuity.

· Reduced Operational Cost: Longer service life and lower breakage rates translate directly into fewer stoppages for media replenishment, lower maintenance costs, and a reduced overall cost-per-ton of processed material.

· Precision Sizing & Smooth Surface: Strict quality control guarantees precise diameter tolerance and a smooth, round finish, leading to efficient grinding kinetics and stable mill load.

3. Technique Specification 

· Material: High-Chrome Alloy Steel (AISI 102 Cr6, ASTM A532, or equivalent).

· Hardness: 58-65 HRC (Surface).

· Chrome Content: Customizable from 10% to 18%.

· Impact Toughness: > 4 J/cm².

· Breakage Rate: < 1%.

· Available Sizes: 15mm, 17mm, 20mm, 25mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm, 110mm, 120mm, 130mm. (Custom sizes available upon request).

· Application: Ideal for Cement Plants (raw mill, clinker mill), Gold/Copper/Iron Ore Mining, Coal Pulverization, and Silica Grinding.

4. Application Industy 

· Cement Industry: For grinding raw materials, coal, and clinker.

· Mining Industry: For grinding various ores such as gold, copper, iron, lead-zinc, and silver.

· Thermal Power Plants: For pulverizing coal.

· Chemical and Industrial Mineral Processing.

5. Why choose us 

· Quality-Focused Manufacturing: State-of-the-art foundry with spectral analysis and automated processes.

· Proven Performance: Our grinding balls are trusted by plants in South America (like Ecuador), Africa, Asia, and worldwide.

· Technical Support: Our engineering team can help you select the optimal size and specification for your mill.

· Global Logistics: Reliable packaging and shipping to major industrial ports worldwide.

Ready to optimize your grinding operation and cut costs?