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100mm Wear Resistant Steel Grinding Balls – Mill Balls for Mineral Processing Ball Mills

PRODUCT PARAMETERS

  • Type: Forged Steel Grinding Balls
  • Diameters(mm):100mm, other size available
  • Application: mining, cement production, power plants, chemistry industries
  • High hardness
  • Good wear resistance
  • High impact toughness
  • Impact value(J/cm²): ≥12
  • Diameter roundness(mm): +4，-3
  • Roundness: ≤4%
Description
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Description

Forged steel balls have high volume hardness, dense structure, and maintain their shape without breaking. They are ideal for grinding operations in industries like metal mining and thermal power plants, especially in semi-autogenous and ball mills

I. Product Overview
Our forged steel balls are manufactured using high-quality alloy steel sourced from leading steel mills. Through fully automated production processes, we ensure precise dimensions, perfect roundness, high hardness, and superior mechanical properties. These steel balls are designed to be wear-resistant, deformation-free, and crack-resistant, making them ideal for demanding industrial applications.

Diameter tolerance and roundness 

Diameter30405060708090100110120125150
Diameter roundness（mm）±2+3，-2+4，-3+5，-4
Roundness(%)≤2≤3≤4≤5

Technical specification

Material Gr.Breakage rateHardness(HRC)Impact value(J/cm²）Drop Test Micro structure
45#<1%≥45≥12≥8000M+C
60Mn<1%≥55≥12≥12000M+C
65Mn<1%≥58≥12≥12000M+C
70Mn<1%≥60≥12≥12000M+C
40Cr<1%≥55≥12≥12000M+C
70Cr2<1%≥58≥12≥12000M+C
B-2<1%≥58≥12≥15000M+C
B-3<1%≥60≥12≥15000M+C

Chemical composition

Material Gr.C（%）Si（%）Mn（%）Cr（%）Cu（%）Mo（%）P（%）S（%）Ni(%)
45#0.42-0.500.17-0.370.5-0.800-0.250-0.250-0.300-0.0350-0.0350-0.30
60Mn0.57-0.650.17-0.370.70-1.00-0.250-0.250-0.300-0.0350-0.0350-0.30
65Mn0.62-0.700.17-0.370.90-1.00-0.250-0.250-0.300-0.0350-0.0350-0.30
70Mn0.67-0.750.17-0.370.90-1.200-0.250-0.250-0.300-0.0350-0.0350-0.30
40Cr0.37-0.450.17-0.370.50-0.80.80-1.10-0.250-0.300-0.0350-0.0350-0.30
70Cr20.65-0.750.20-0.300.75-0.900.55-0.700-0.250-0.300-0.0300-0.0300-0.30
B-20.70-0.800.17-0.370.70-0.800.50-0.600-0.250-0.300-0.0350-0.0350-0.30
B-30.58-0.661.2-1.60.65-0.800.70-0.900-0.250-0.300-0.0350-0.0350-0.30

II. Application Areas
Our forged steel balls are widely used in various industries, including:

  • Metal mining (gold, copper, iron, molybdenum, and alumina ores)
  • Cement plants
  • Power plants
  • Steel slag processing plants
  • Quartz sand plants

III. Production Process
The manufacturing process includes the following steps:

  1. Raw material inspection
  2. Cutting
  3. Heating in a medium-frequency furnace
  4. Forging into spherical shapes
  5. Quenching for hardness enhancement
  6. Tempering for improved toughness
  7. Rigorous quality testing
  8. Packaging

IV. Key Features

  1. Low Breakage Rate: Breakage rate is less than 1%, with breakage resistance more than double that of conventional cast balls.
  2. High Impact Toughness: Impact toughness exceeds 12 J/cm², ensuring durability under heavy impact conditions.
  3. Uniform Hardness: Surface hardness ranges from 58-65 HRC, while bulk hardness ranges from 55-63 HRC, with an even hardness gradient.
  4. Deformation-Free: Maintains perfect roundness and shape even under extreme conditions.
  5. Cost-Effective: Dense microstructure and superior performance lead to significant cost savings over time.

V. Quality Assurance
To ensure the highest quality standards, our steel balls undergo rigorous testing, including:

  1. Hardness testing
  2. Impact resistance testing
  3. Metallographic inspection for internal integrity
  4. Core hardness testing through sampling
100 mm forged grinding ball
forged grinding ball
process grinding ball
equipment
grinding ball equipment
packing
packing
shipping of grinding ball

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