The Product Description:
1 High Chromium casting ball
Hardness: HRC 60-66
Microstructure: M+C
Chemical Composition(%):C:1.9-3.3 ,Si:0.3-1.0 ,Mn:0.2-0.8,Cr:10.0-30.0,
P:0. 9 MAX ,S:0.9 MAX

2 Medium Chromium casting ball
Hardness: HRC 48-55
Chemical Composition(%): C:2.0-3.3,Si:0.3-1.0;Mn:0.3-1.0,Cr:3.0-6.0,
P:0.1 MAX, S:0.12 MAX
Microstructure: P+C

3 Low Chromium casting ball
Hardness: HRC46-53
ChemicalComposition(%):C:2.0-3.3,Si0.3-1.0,Mn:0.3-1.0,Cr:1.0-2.5,
P:0.1 5 MAX, S:0.20 MAX
Microstructure: P+C