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%

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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

Diameter	30	40	50	60	70	80	90	100	110	120	125	150
Diameter roundness（mm）	±2				+3，-2			+4，-3				+5，-4
Roundness(%)	≤2				≤3			≤4				≤5

Technical specification

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

Chemical composition

Material Gr.	C（%）	Si（%）	Mn（%）	Cr（%）	Cu（%）	Mo（%）	P（%）	S（%）	Ni(%)
45#	0.42-0.50	0.17-0.37	0.5-0.80	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
60Mn	0.57-0.65	0.17-0.37	0.70-1.0	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
65Mn	0.62-0.70	0.17-0.37	0.90-1.0	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
70Mn	0.67-0.75	0.17-0.37	0.90-1.20	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
40Cr	0.37-0.45	0.17-0.37	0.50-0.8	0.80-1.1	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
70Cr2	0.65-0.75	0.20-0.30	0.75-0.90	0.55-0.70	0-0.25	0-0.30	0-0.030	0-0.030	0-0.30
B-2	0.70-0.80	0.17-0.37	0.70-0.80	0.50-0.60	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
B-3	0.58-0.66	1.2-1.6	0.65-0.80	0.70-0.90	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30

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:

Raw material inspection
Cutting
Heating in a medium-frequency furnace
Forging into spherical shapes
Quenching for hardness enhancement
Tempering for improved toughness
Rigorous quality testing
Packaging

IV. Key Features

Low Breakage Rate: Breakage rate is less than 1%, with breakage resistance more than double that of conventional cast balls.
High Impact Toughness: Impact toughness exceeds 12 J/cm², ensuring durability under heavy impact conditions.
Uniform Hardness: Surface hardness ranges from 58-65 HRC, while bulk hardness ranges from 55-63 HRC, with an even hardness gradient.
Deformation-Free: Maintains perfect roundness and shape even under extreme conditions.
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: