1:High hardness wear resistance,Low breakage 2:HRC45-67 3:Diameter 20-150mm 4:Certification:ISO9001 5:Used to Ball mill

1.Chemical Composition 

Material	C	Mn	Si	Cr	S	P
50Mn	0.48-0.56	0.70-1.0	0.17-0.37	≤0.25	≤0.035	≤0.035
60Mn	0.57-0.65	0.70-1.0	0.17-0.37	≤0.25	≤0.035	≤0.035
65Mn	0.60-0.70	0.90-1.2	0.17-0.37	≤0.25	≤0.035	≤0.035
B2	0.70-0.85	0.70-0.80	0.17-0.37	0.2-0.7	≤0.03	≤0.03
75SiMn	0.70-0.90	0.70-1.20	0.4-0.8	≤0.25	≤0.03	≤0.03
Wear-resistant Alloy	0.50-0.65	0.4-1.0	1.4-1.8	0.9-1.2	≤0.03	≤0.03

 2.Physical Property

Material	Impact Test(Ak.J/cm²)	Endurance Test Times(5m/T)	Surface Hardness (Φ25mm- Φ60mm)	Core Hardness (Φ25mm- Φ60mm)	Surface Hardness (Φ70mm- Φ100mm)	Core Hardness (Φ70mm- Φ100mm)	Breakage
50Mn	≥12	≥10000	≥56	≥35	≥56	≥28	<1%
60Mn	≥13	≥10000	≥58	≥38	≥58	≥29	<1%
65Mn	≥15	≥12000	≥60	≥42	≥60	≥30	<1%
B2	≥17	≥12000	≥60	≥52	≥60	≥50	<1%
75SiMn	≥16	≥12000	≥60	≥50	≥60	≥48	<1%
Wear-resistant Alloy	≥17	≥12000	≥60	≥54	≥60	≥52	<1%

specical material for Client: GN-40CR, GN-B2, GN-B3,GN-B4, GN-B6,GN-BU for your choice.

 3.Size and Weight 

Norminal Diameter	Diametrical Tolerance(mm)	Approx Weight of Single Ball(kg)	Average Number of One MT
20mm/0.75''	+1,-0.5	0.033	30303
25mm/1''	+1,-0.5	0.064	15625
30mm/1.25''	+2,-1	0.11	9090
40mm/1.5''	+2,-1	0.261	3831
50mm/2''	+2,-1	0.51	1961
60mm/2.5''	+2,-1	0.883	1132
70mm/2.75''	+3,-1.5	1.402	713
80mm/3.25''	+3,-1.5	2.092	478
90mm/3.5	+3,-1.5	2.98	335
100mm/4''	+3,-1.5	4.087	244
110mm/4.5''	+3,-1.5	5.44	183
120mm/4.75''	+3,-1.5	7.062	141

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