1) High Hardness: the surface hardness of forged and rolling balls is to 60-65 HRC and volume hardness is to 60-63 HRC

2) High Impact Toughness: the impact toughness is more than 12 J/cm2;

3) Low Broken Rate: the actual broken rate is not higher than 1%;

4) Even Wear-resistance: the loss of ball round rate is 50-300 g/ton.

Specification:

Brand	Material	C	Mn	Si	Cr	P/S	Ni
DT-1	50Mn	0.48-0.56	0.65-1.0	0.17-0.37	0.15max	0.035max	0.05max
DT-2	60Mn	0.57-0.65	0.70-1.1	0.17-0.37	0.25max	0.035max	0.05max
DT-3	65Mn	0.62-0.75	0.90-1.2	0.17-0.37	0.25max	0.035max	0.10max
DT-4	75MnCr(B2)	0.72-0.85	0.70-0.90	0.17-0.35	0.40-0.60	0.035max	0.15max
DT-5	B3	0.50-0.65	0.4-1.0	1.40-1.80	0.77-1.10	0.035max	0.15max
DT-6	45#	0.42-0.48	0.50-0.80	0.17-0.37	0.15max	0.035max	0.05max

Diameter, Diametrical tolerance, Weight, Impact toughness of our grinding balls

Nominal Diameter (mm)	Diameteical Tolerance (mm)	Weight of Single of forging ball in average	Number of piece of One ton forging ball in average	Surface Hardness	Impact Toughness
DIA 20 DIA 25 DIA 30 DIA 40 DIA 50	+2 -1	32 64 110 263 513	31250 15625 9090 3802 1949	55-65	≥12
DIA 60 DIA 70 DIA 80 DIA 90 DIA 100	+3 -2	888 1410 2104 2996 4110	1126 709 475 333 243
DIA 110 DIA 120 DIA 130	+4 -2	5457 7102 9030	182 140 110
DIA 140 DIA 150	+4 -3	11278 13871	88 72

1). Raw material:
All the material is qualified with certificate and made in the Chinese largest steel production enterprise.

2). Different steel specifications ccording to the clients's requirements.
Main Steel Material:C45 Steel;60Mn Steel;B2 Steel

3). Steel Cutting:
the steel bars should be cut into small pieces according to the size of steel balls required by the order.

4). Heating:
We use the electric furnace instead of the traditional coal stove, the biggest advantage is that all the steel bars can accept the most approriate temperature during the heating progress. It affect the hardness and toughness directly.

5). Hammer forging:
the raw material is forged to a certain deformation by the air hammer, when the compression ratio increased, the micro-structure become more compact so that the hardness and the toughness can be improved.

6). Heat treatment:
both the water quenching heat treatment production line and our own temperature control technics are important.
We have mature production technicians responsible for the heat treatment process as we know this process affect the grinding balls performance directly.

7). Quality Control.
Raw material test before production
Hardness test Drop Test Impact Test Core pulling Test after production
SGS test before delivery
Certificate: ISO 9001:2008
 
Testing:
Quality control for each production shift (4hours/Shift);
Hardness, chemical elements and impact testing after production for each production shift;
SGS –third party testing before each delivery
 
Packing:
1. Bags:1000KG polypropylene bags which are highly resistant to UV rays and secure bag straps to reduce time  and effort in loading and unloading.
 
2. Drums:Recyeled drums can also be supplied. the drums have a removable lid and compression ring for secure storage.Drums are more efficient for some modes of transportation and can also be delivered on wooden pallets.

Specification of CAsting Grinding Ball

1)High chrome cast balls
Size: 20mm-150mm

Hardness:HRC58-65; Chrome content:11-14%
2)Low chrome cast balls
Size: 20mm-150mm
Hardness:HRC45-55; Chrome content:1-5%

Strength casting excellent,integrity forging brilliant.Our aim is to insist on the theory of ''quality first,credit goal,and mutual profits".We are trying best to supply customers from both at home and abroad with high quality products and satisfactory service.

1) in general, forged 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.Our products have obtained ISO 9001---2008
.