Medium Chromium Cast Iron Grinding Balls

PRODUCT PARAMETERS

Description

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Medium Chrome Alloy Cast Grinding Balls offer a balance between hardness, toughness, and cost-effectiveness.

Diameter tolerance：

Diameter (mm)	Φ<30	30<Φ<60	60<Φ<80	80<Φ<100	Φ>100
Diameter tolerance(mm)	+1,-1	+1.5,-1	+2,-1	+2.5,-1	+3,-1

Technical specification：

Material	Diameter(mm)	Hardness(HRC)	Breakage rate	Impact value(J/cm²)	Drop times(times)	Micro structure
ZQCr5	17-150	>47	<1%	>2	≥10000	M+C

Chemical composition

Features:

Material Composition – Typically contain 5-10% chromium (Cr) along with carbon (C), manganese (Mn), and other alloying elements like molybdenum (Mo) and nickel (Ni).
Moderate Hardness – Hardness ranges from 48-58 HRC, lower than high-Cr balls but higher than low-Cr balls.
Balanced Wear Resistance – Offers better wear resistance than low-Cr balls but slightly lower than high-Cr balls.
Improved Toughness – Less brittle than high-Cr cast balls, reducing the risk of breakage in high-impact applications.
Corrosion Resistance – Performs well in both wet and dry grinding conditions.
Heat Treatment – Quenching and tempering improve wear resistance and mechanical properties.
Applications – Used in cement plants, power stations, and mineral processing, especially in conditions that require both durability and cost efficiency.