Casting Steel Ball: 1)Diameter:25-130 mm 2)High mill efficiency 3)Hardness: 48-64HRC 4)Material:special hi-Cr1,Cr2

Casting Steel Ball:

 1.Material special hi-Cr1,special hi-Cr2  

2.Diameters 25mm-130mm

3.Characteristic High hardness, Grinding endurable ,None           

out-of-round, Low percentage of damage, High total mill efficiency.

4.Apply Realm Cement plan, mine , Mill tailings ,Thermal power generation, Chemical industry.

5.Packing  Jumbo bag or Iron drum

Classification Chemical Composition And  Metallurgical Structure

Name	Material	C	Si	Cr	Mn	S	P	Mo	Al	microstructure
zw-7	special-Cr1	2.0-2.8	≤1.0	22-32	0.5-2.0	≤0.06	≤0.08	micro	micro	M +C
zw-8	special-Cr2	2.0-2.8	≤1.0	17-22	0.5-2.0	≤0.06	≤0.08	micro	micro	M +C

 Mechanical Property

Name	Material	Impact test (AK. J/cm2)	Endurance test times(5m)	Quenching Hardness (HRC)	Un quenching  Hardness( H RC)	Breakage
zw-7	special-Cr1	≥4	≥10000	≥60	≥49	<1%
zw-8	special-Cr2	≥4	≥10000	≥60	≥48	<1%

Substance

Nominal Diameter (mm)	Diameter Tolerance (mm)	Approx weight per ball (kg)	Average number per MT	Microstructure
25	+1.5,-0.5	0.064	15625	M +B+C (M:Martensite;B:Bainitic;C:Carbide)
30	+1.5,-0.5	0.11	9090
40	+2.0,-1.0	0.26	3846
50	+2.0,-1.0	0.51	1961
60	+3.0,-2.0	0.89	1124
70	+3.0,-2.0	1.4	714
80	+3.0,-2.0	2.1	476
90	+3.0,-2.0	3	333
100	+4.0,-3.0	4.1	244
110	+4.0,-3.0	5.47	283
120	+4.0,-3.0	7.1	141
130	+4.0,-3.0	9.02	111

Casting Steel Ball