70MM Special High Chrome Cast Grinding Steel Ball

Specifications

1.Chrome Grinding Ball Dia17-150MM
2.Even hardness
3.Grinding resistant
4.High impact value
5.High combined efficiency

 

70MM Special High Chrome Cast Grinding Steel Ball

 

1.Features of Cast Grinding Balls

1) In general, casting grinding ball has high hardness: surface hardness to55-68 HRC, volume hardness of 53-63 HRC

2) impact toughness high: impact toughness more than 12 J / cm2.

3) broken rate is low: the actual broken rate is not higher than 1%.

4) loss of grinding forged steel ball round rate is low

 

2.Material and Chemical Composition of Casting Grinding Ball

Name	Model	Material	C	Si	Mn	Cr	S	P
TITLE-8	High Chrome	Cr-22-32%	2.0-2.8	≤1.0	0.5-2.0	22-32	≤0.06	≤0.08
TITLE-9		Cr-17-22%	2.0-2.8	≤1.0	0.5-2.0	17-22	≤0.06	≤0.08
TITLE-10		Cr-14-17%	2.2-3.0	≤1.0	0.5-2.0	15-17	≤0.06	≤0.08
TITLE-11		Cr-10-14%	2.2-3.2	≤1.0	0.5-2.5	11-14	≤0.06	≤0.08
TITLE-12	Medium Chrome	Cr-5-10%	2.1-3.2	≤1.2	0.5-1.5	5-10	≤0.06	≤0.08
TITLE-13	Low Chrome	Cr-1.0-5%	2.2-3.5	≤1.2	0.5-1.5	1.5-3	≤0.06	≤0.08

 

3.Physical Property of Casting Grinding Ball

Model	Hardness(HRC)		Impact Test(Ak.J/cm2)	Endurance Test Times(5m)	Microstructure
	Quenching	Unquenching
High Chrome	≥60	≥50	≥4	≥12000	M+C
Medium Chrome	-	≥48	≥3	≥10000	P+C
Low Chrome	-	≥46	≥2	≥8000	P+C

 

4. Specification of Cast Grinding Balls

Nominal Diameter		Diameter Tolerance	Weight of Single Ball In Average	Numbers of Per Ton Ball In Average
(mm)	(Inch)	(mm)	(g)
20	0.75’’	+2 -1	32	31250
25	1’’		64	15625
30	1.25”		110	9090
40	1.5’’		263	3802
50	2’’		513	1949
60	2.5’’	+3 -2	888	1126
70	2.75		1410	709
80	3.25’’		2104	475
90	3.5’’		2996	333
100	4’’		4110	243
110	4.5’’	+4 -2	5457	182
120	4.75’’		7102	140
130	5’’		9030	110
140	5.5’’	+4 -3	11278	88
150	6’’		13871	72

 

5.High chrome cast balls
Size: 20mm-120mm

Hardness:HRC58-65; Chrome content:11-14%

6.Low chrome cast balls
Size: 20mm-120mm
Hardness:HRC45-55; Chrome content:1-3.5%

 

7.Main Process of Casting Grinding Balls

(1)Raw material (2)Scientific Proportioning (3)Electric Furnace Smelting (4)Assay Before Furnace (5)Mould Forming (6)Polishing (7)Heat Treatment (8)Qualified Products (9)Packing

 

8.Applied Field

1)Cement Plants 2)Mines 3)Power stations 4)Chemical Industries 5)Grinding Mill, Ball mill, Coal mill

 

9. Products Name

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10.Packing

(1)Container Bags

 

(2)Steel Drums

 

11. Photos of Products, Factory, Raw materials, Cutting Material, Processing Line, Testing, Packaging