Forging Grinding Steel Ball

1. High hardness 2. High toughness 3. Good wear resistance 4. No mal-roundness 5.adequent supply and quality guarantee

Type and Chemical Composition of Forging Grinding Steel Ball

 

Name	Material	C	Mn	Si	Cr	S	P
DZ-1	50Mn	0.48-0.56	0.70-1.0	0.17-0.37	≤0.25	≤0.035	≤0.035
DZ-2	60Mn	0.57-0.65	0.70-1.0	0.17-0.37	≤0.25	≤0.035	≤0.035
DZ-3	65Mn	0.60-0.70	0.90-1.2	0.17-0.37	≤0.25	≤0.035	≤0.035
DZ-4	B2	0.70-0.85	0.70-0.80	0.17-0.37	0.2-0.7	≤0.03	≤0.03
DZ-5	75SiMn	0.70-0.90	0.70-1.20	0.4-0.8	≤0.25	≤0.03	≤0.03
DZ-6	Wear-resistant Alloy	0.50-0.65	0.4-1.0	1.4-1.8	0.9-1.2	≤0.03	≤0.03

 

Physical Property of Forging Grinding Steel Ball

 

Name	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
DZ-1	50Mn	≥12	≥10000	≥56	≥35	≥56	≥28	<1%
DZ-2	60Mn	≥13	≥10000	≥58	≥38	≥58	≥29	<1%
DZ-3	65Mn	≥15	≥12000	≥60	≥42	≥60	≥30	<1%
DZ-4	B2	≥17	≥12000	≥60	≥52	≥60	≥50	<1%
DZ-5	75SiMn	≥16	≥12000	≥60	≥50	≥60	≥48	<1%
DZ-6	Wear-resistant Alloy	≥17	≥12000	≥60	≥54	≥60	≥52	<1%

Weight and Microstructure of Forging Grinding Steel Ball 

 

Norminal Diameter	Diametrical Tolerance(mm)	Approx Weight of Single Ball(kg)	Average Number of One MT	Microstructure
25mm/1''	+1.5,-0.5	0.064	15625	M+B+C (M-Martensite;B-Bainitic;C-Carbide)
30mm/1.25''	+1.5,-0.5	0.11	9090
40mm/1.5''	+2.0,-1.0	0.26	3846
50mm/2''	+2.0,-1.0	0.51	1961
60mm/2.5''	+3.0,-2.0	0.89	1124
70mm/2.75''	+3.0,-2.0	1.4	714
80mm/3.25''	+3.0,-2.0	2.1	476
90mm/3.5''	+3.0,-2.0	3	333
100mm/4''	+4.0,-3.0	4.1	244
110mm/4.5''	+4.0,-3.0	5.47	283
120mm/4.75	+4.0,-3.0	7.1	141
130mm/5''	+4.0,-3.0	9.02	111

 

Forging Grinding Steel Ball