Grinding Media Steel Balls

Introduction
Dongbang brand grinding media steel balls, your best choice to reduce ball consumption 15-20% than before.
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Technical Datas
Application: mining, like Iron Ore, Copper, Gold, Silver, etc
Certification: ISO9001, ISO14001, OHSAS18001 etc.
Original: Jiangsu, China
Price: Negotiable
Payment term: TT, LC
Delivery date: Negotiable
Packing: export standard ton bag or Iron drum
Major Market: Middle East/ Africa/Asia/South America/Europe/North America
MOQ: 50 tons (2x20’GP)
Raw material: Steel rod,
Finished ball size: 25mm to 125mm
Our steel rod supplier: Only Chinese local steel mill, like Huai Steel, NISCO, etc.

Characteristics
Steel rod type: B3,B4,B6
Detailed chemical comments as below:

Steel Rod Type: B3, Chemical Comments
C	Si	Mn	P	S	Cr
0.61-0.65	1.73-1.80	0.73-0.80	≤0.020	≤0.015	0.80-0.88
Ni	Cu	Mo	Alt	V
≤0.25	≤0.20
Steel Rod Type: B4, Chemical Comments
C	Si	Mn	P	S	Cr
0.66-0.74	1.2-1.4	0.50-0.70	≤0.022	≤0.022	0.85-1.0
Ni	Cu	Mo	Alt	V
	≤0.40		0.025-0.045	0.05-0.15
Steel Rod Type: B6, Chemical Comments
C	Si	Mn	P	S	Cr
0.74-0.85	0.15-0.35	0.90-1.05	≤0.020	≤0.020	0.88-0.98
Ni	Cu	Mo	Alt	V
≤0.25	≤0.25	0.06-0.13	0.025-0.045

Detailed quality parameters:

Steel Rod Type: B2, Chemical Comments (Grinding Media Steel Balls)
C	Si	Mn	P	S	Cr
0.76-0.82	0.17-0.35	0.72-0.80	≤0.020	≤0.015	0.50-0.60
Ni	Cu	Mo	Alt	V
≤0.25	≤0.20	None	0.020-0.050	None
25mm-30mm Grinding Media Steel Balls Quality Performance
Ball Size	Surface Hardness		Core Hardness		Volume Hardness
25mm	63-64 HRC		62-63 HRC		62-64 HRC
30mm	63-64 HRC		62-63 HRC		62-64 HRC

Steel Rod Type: B2, Chemical Comments (Grinding Media Steel Balls)
C	Si	Mn	P	S	Cr
0.76-0.82	0.17-0.35	0.72-0.80	≤0.020	≤0.015	0.50-0.60
Ni	Cu	Mo	Alt	V
≤0.25	≤0.20	None	0.020-0.050	None
40mm-50mm Grinding Media Steel Balls Quality Performance
Ball Size	Surface Hardness		Core Hardness		Volume Hardness
40mm	62-64 HRC		61-63 HRC		61-64 HRC
50mm	61-64 HRC		60-63 HRC		60-63 HRC

Steel Rod Type: B6, Chemical Comments (Grinding Media Steel Balls)
C	Si	Mn	P	S	Cr
0.74-0.85	0.15-0.35	0.90-1.05	≤0.022	≤0.020	0.88-1.0
Ni	Cu	Mo	Alt	V
≤0.25	≤0.25	0.06-0.13	0.025-0.045	/
60-90mm Grinding Media Steel Balls Quality Performance
Ball Size	Surface Hardness	Core Hardness	Volume Hardness	Impact Toughness
60mm	62-64 HRC	59-61 HRC	59-62 HRC	≥14 J/CM2
70mm	62-64 HRC	59-61 HRC	59-62 HRC	≥16 J/CM2
80mm	61-63 HRC	58-60 HRC	59-62 HRC	≥18 J/CM2
90mm	61-63 HRC	58-60 HRC	59-62 HRC	≥20 J/CM2

Steel Rod Type: B6, Chemical Comments (Grinding Media Steel Balls)
C	Si	Mn	P	S	Cr
0.74-0.85	0.15-0.35	0.90-1.05	≤0.022	≤0.020	0.88-1.0
Ni	Cu	Mo	Alt	V
≤0.25	≤0.25	0.06-0.13	0.025-0.045	/
100-125mm Grinding Media Steel Balls Quality Performance
Ball Size	Surface Hardness	Core Hardness	Volume Hardness	Impact Toughness
100mm	60-62 HRC	57-60 HRC	58-62 HRC	≥22 J/CM2
120mm	60-62 HRC	57-60 HRC	58-62 HRC	≥24 J/CM2
125mm	60-62 HRC	57-60 HRC	57-61 HRC	≥26 J/CM2

6 meter fall drop test: More than 20,000 times, No Break

We request our local steel rod promise us on compressional rate ? See below picture:

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Why do we request the compression rate 15 time at least ? Because we need to promise the steel rod have a high density to match the hot rolling method.

Our production flow picture on Grinding Media Steel Balls:

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1.Steel rod automatic feeding to induction;

2.Steel rod heating to requested temperature by induction furnace;

3.Heated steel rod go into hot rolling machine to make grinding balls;

4.Hot grinding balls slow cooling on convey;

5.Grinding balls cools to right temperature and go into quenching system;

6.Grinding balls after quenching, cool again by convey and send into automatic tempering furnace;

7.Grinding balls do tempering treatment by correct temperature and time upon ball size in automatic tempering furnace, go into cooling plate;

8.Grinding balls after tempering treatment, will cool to room temperature;

9.Do the packing for grinding balls, in ton bag or iron drum.

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Grinding Media Steel Balls

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