1.Introduce of grinding steel ball

The diameter of  forged grinding balls are from 20mm-150mm, the surface hardness is 60-65HRC, the core hardness is 50-55HRC.Different ball diameter and raw steel material with different price cost.Chemical composition and physical property detail are as following .

2.Specification of grinding steel balls.

Steel material %	C	Si	Mn	S	P	Cr	Ni	HRC
45# steel	0.42-0.5	0.17-0.37	0.5-0.8	≤0.04	≤0.04	≤0.25	≤0.25	55-60
40Cr	0.37-0.45	0.2-0.4	0.5-0.8	≤0.035	≤0.035	0.8-1.1	/	60-65
42CrMo	0.38-0.45	0.2-0.4	0.5-0.8	≤0.035	≤0.035	0.9-1.2	/	60-65
50Mn	0.48-0.56	0.17-0.37	0.7-1.0	≤0.04	≤0.04	≤0.25	≤0.25	60-65
60Mn	0.57-0.65	0.17-0.37	0.7-1.0	≤0.04	≤0.04	≤0.25	≤0.25	60-65
65Mn	0.62-0.70	0.17-0.37	0.9-1.2	≤0.04	≤0.025	≤0.25	≤0.25	60-65
75MnCr	0.65-0.78	0.17-0.37	0.7-1.2	≤0.035	≤0.035	0.55-0.6	/	60-65
B3	0.62-0.65	0.17-0.4	0.7-1.0	≤0.035	≤0.035	0.7-1.2	/	60-65
B6	0.77-0.85	0.17-0.37	0.7-1.0	≤0.035	≤0.035	0.88-0.98	/	60-65
We can also do other steel material like GCr15,70Cr2 etc. Jest tell us your requied material.

3. Picturers of grind steel balls.