The Ball Diameter (mm)	Unit Weight	Numbers of Per Metric Ton
20	0.03	31056
25	0.06	15873
30	0.11	9091
40	0.26	3891
50	0.50	2000
60	0.87	1153
70	1.37	729
80	2.05	487
90	2.90	345
100	4.00	250
110	5.30	188
120	6.80	147
130	8.74	114

 

 Specialication 

 

Cast Steel Balls	Cr %	C %	Mn %	Si %	P %	S %
Low Chrome	1%	2.2-2.5	0.3-1.0	0.3-1.0	≤0.1	≤0.1
High Chrome	10%	1.8-3.2	0.5-1.5	0.3-1.2	≤0.05	≤0.05
High Chrome +	17%	1.8-3.2	0.5-1.5	0.3-1.2	≤0.05	≤0.05
Quenching Oil	10%-17%	1.8-3.2	0.5-1.5	0.3-1.2	≤0.05	≤0.05

 

Cast Steel Balls	Cr %	Hardness	Ak(J/CM2)	Microstructure	Times of Falling
Low Chrome	1%	42-45HRC	≥1.6	P+C	≥10000
High Chrome	10%	50-55HRC	≥2.5	M+C+A	≥15000
High Chrome +	17%	50-55HRC	≥2.5	M+C+A	≥15000
Quenching Oil	10%-17%	57-64HRC	≥3.0	M+C+A	≥20000