70MM Forged Grinding Mill Balls

Specifications

1:High hardness wear resistance,Low breakage
2:HRC55-67
3:Diameter 20mm-150mm
4:Certification:ISO9001
5:Used to Ball mill

 

70MM Forged Grinding Mill Balls

 

1.Feature:

1) In general, grinding steel ball has high hardness: surface hardness to 55-68 HRC, volume hardness of 50-63 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.Chemical Composition of Forged Grinding Ball

Based on material,the forged steel balls are defined into 7 brands. And The chemical composition is shown in the following:

Brand	Material	C	Mn	Si	Cr	S	P	V
TITLE-1	50MN	0.48-0.56	0.70-1.0	0.17-0.37	≤0.25	≤0.035	≤0.035
TITLE-2	60MN	0.57-0.65	0.70-1.0	0.17-0.37	≤0.25	≤0.035	≤0.035
TITLE-3	65MN	0.60-0.70	0.90-1.20	0.17-0.37	≤0.25	≤0.035	≤0.035
TITLE-4	75Mn	0.72-0.92	0.90-1.20	0.17-0.37	0.4-0.6	≤0.035	≤0.035
TITLE-5	75MnCr(B2)	0.70-0.85	0.7-0.8	0.17-0.37	0.2-0.7	≤0.03	≤0.03
TITLE-6	75SiMn	0.70-0.90	0.7-1.2	0.4-0.8	≤0.25	≤0.03	≤0.03
TITLE-7	Wear-resistant Alloy	0.5-0.65	0.4-1.0	1.4-1.8	0.9-1.2	≤0.03	≤0.03	0.1-0.2

 

3.Chemical Composition of Casting Grinding Ball

Based on material,the casting steel balls are defined into 6 brands. And The chemical composition is shown in the following:

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

 

4.Specification of Grinding Ball

 

5.Specification of Casting Grinding Ball

1)High chrome cast balls
Size: 20mm-120mm

Hardness:HRC58-65; Chrome content:11-14%
2)Low chrome cast balls
Size: 20mm-120mm
Hardness:HRC45-55; Chrome content:1-3.5%

 

6.Main Process of Forged Steel Ball

(1)Raw material.(2)Cutting.(3)Heating.(4)Forging.(5)Quenching.(6)Tempering.(7)Testing.(8)Qualified Products.(9)Packing

 

7.Main Process of Casting Grinding Ball

(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. Packaging

(1) Steel Drums

 

(2)Container Bags

 

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