Product Details

Spherical steel balls for mining and cement with ISO 9001

Product Description

Introduction

Specification of ADI Grinding Balls
Nominal Diameter	Diametrical Tolerance	Weight of Single Ball in Average	Hardness	Impact Toughness
(mm)	(mm)	(g)	(HRC)	(J/cm²)
φ20	+2 -1	32	60-64	7-10
φ25		64
φ30		110
φ40		263
φ50		513
φ60	+3 -2	888
φ70		1410
φ80		2104
φ90		2996
φ100		4110
φ110	+4 -2	5457
φ120		7102
φ130		9030
φ140	+4 -3	11278
φ150	+4 -3	13871

Chemical Composition(%)

C	Si	Mn	Cr	Ni	Cu	Mo	S	P
3.3-3.9	2.2-3.0	2.3-2.9	1.0	0.2-0.5	0.4-1.0	0.3-0.8	0.03-0.05	0.03-0.05

Key Indicators

ADI Grinding Ball	Density	Surface Hardness (HRC)	Impact Toughness	Metallographic Structure	Falling Ball Impact Fatigue Life
	7.3 T/m³	64	7-10 J/cm²	B+A+Carbide	≤Φ100	≥18000
					>Φ100	≥15000
Characteristics:	High hardness, good wear-resistance, light in weight, energy saving, neat appearance, external hard inside tough, not broken.

Material and physical properties for the grinding balls

1) Material:

The grinding ball is prepared by nodular irons containing alloying elements such as nickel, molybdenum, chromium, copper and so on.

2) Physical properties:

The grinding balls show higher hardness (surface hardness of HRC60. After using, the surface hardness of the balls is about HRC64.) and good impact toughness of 7~10 J/cm2.

Advantages of the grinding ball over the other balls presently used

Description	Properties			Metallographic Structure	Falling-Ball Impact Fatigue Life
	Superficial Hardness (HRC)	AK (J/Cm²)
ADI Grinding Ball	≥60		≥7	B+A+ Carbide	<Φ100	≥18000
					≥Φ100	≥15000
Low-Cr Ball	≥45		≥2.5	P + Carbide	>5000
Medium-Cr Ball	≥47		≥2.5	P + Carbide	<Φ80	≥13000
					≥Φ80	≥6000
High-Cr Ball	≥55		≥2.5	M + Carbide	<Φ80	≥15000
					≥Φ80	≥10000
Forged Ball	≥47		≥10	P + Carbide	----	----