casting steel balls - DIA20-150mm

Grinding balls included one kind named chrome cast iron grinding balls, three series (High/Middle/Low chrome cast iron grinding balls) can be provided in standard sizes, they are used to assist in the extraction process for many metals such as gold, copper, lead, zinc, iron, nickel, tin, chrome and silver. In addition to metalliferous processing, balls are used for grinding coal in power stations, especially for lime and clinker in the cement industries and base materials in the building products industry. The ball hardness profiles to maximize wear and impact performance, customized product is available to meet milling and ore conditions. The balls have gotten high reputations for their high hardness, good wear resistance, no breakage etc.

1. Standard ball sizes are as follows:
Ball Diameter (nominal) mm-----(nominal) Inches
20mm 4/5 inch
25mm 1 inch
30mm 1 1/4nch
40mm 1 1/2nch
50mm 2 inch
60mm
70mm
80mm 3 1/4inch
90mm 3 1/2 inch
100mm 4 inch
110mm 4 1/4 inch
120mm 4 3/4inch

2. A full range hardness we provided in standard sizes:
Minimum Hardness:
Brinell Rockwell C Chromium (%)
BHN400 HRC 43 non-chromium
BHN480 HRC 50 Cr: 1.0~3.0
BHN560 HRC 55 Cr: 7.0~10.0
BHN615 HRC 58 Cr: 10.0~16.0; Cr: 16.0~22.0; Cr: 22.0~28.0;


3.Products all-round properties: High Hardness, better wear resistance, even wearing
Breakage rate of ball: 2.0% Max;
Dropping test: 8000 times minimum with 3.5 meter dropping test machine.
Impact fatigue life test: Ak. =3 J/CM2 Minimum

4. Packages: By flexible container bags (1000kg/bag), or by steel drums (850kgs-900kgs/drum)
Note: Technical staff in consultation with the customer can advise the optimum product for your application if possible, please feel free to contact us.