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Diameter 30mm - 150mm Grinding Steel Mill Balls Forged Steel Ball

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Diameter 30mm - 150mm Grinding Steel Mill Balls Forged Steel Ball

Country/Region	china
City & Province	luoyang henan

Product Details

custom grinding steel mill balls Forged steel ball with high quality

Production process of Forged steel ball

1)Fully automatic production line of hot rolling steel ball

Manual put material into storage rack→automatic continued feeding device→stokehole pinch roll feeding device→furnace heating→pinch roll discharging speediness discharging→enter into rolling ball machine→rolling ball quenching system→steel ball sweltering self tempering device→finished product steel ball

2)Semi automatic production line of hot forging steel ball

Cutting raw material→furnace heating→forging→enter into rolling ball machine→Isothermal system→quenching system→steel ball sweltering self tempering device→finished product steel ball

3)Traditional production line of forged steel ball

Cutting raw material→furnace heating→forging→Isothermal system→quenching system→steel ball sweltering self tempering device→finished product steel ball

1.Diameter tolerance and roundness

Diameter	30	40	50	60	70	80	90	100	110	120	125	150
Diameter roundness(mm)	±2				+3,-2			+4,-3				+5,-4
Roundness(%)	≤2				≤3			≤4				≤5

2.Chemical composition

Brand	C(%)	Si(%)	Mn(%)	Cr(%)	Cu(%)	Mo(%)	P(%)	S(%)	Ni(%)
45#	0.42-0.50	0.17-0.37	0.5-0.80	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
40Mn	0.37-0.44	0.17-0.37	0.7-1.0	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
50Mn	0.48-0.56	0.17-0.37	0.60-1.0	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
60Mn	0.57-0.65	0.17-0.37	0.70-1.0	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
65Mn	0.62-0.70	0.17-0.37	0.90-1.0	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
70Mn	0.67-0.75	0.17-0.37	0.90-1.20	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
40Cr	0.37-0.45	0.17-0.37	0.50-0.8	0.80-1.1	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
42CrMo	0.38-0.45	0.17-0.37	0.50-0.80	0.90-1.2	0-0.03	0.15-0.25	0-0.035	0-0.035	0-0.30
70Cr2	0.65-0.75	0.20-0.30	0.75-0.90	0.55-0.70	0-0.25	0-0.30	0-0.030	0-0.030	0-0.30
40Mn2	0.37-0.44	0.17-0.37	1.4-1.8	0-0.25	0-0.25	0-0.30	0-0.035	0-0.30	0-0.30
70Mn2	0.65-0.75	0.20-0.45	1.4-1.8	0-0.25	0-0.25	0-0.30	0-0.035	0-0.030	0-0.30
B-1	0.52-0.65	0.17-0.37	0.60-1.2	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
B-2	0.70-0.80	0.17-0.37	0.70-0.80	0.50-0.60	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
B-3	0.58-0.66	1.2-1.6	0.65-0.80	0.70-0.90	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
B-4	0.60-0.65	1.6-1.7	0.7-0.8	0.7-0.8	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
B-6	0.75-0.85	0.2-0.40	0.9-1.0	0.85-0.95	0-0.25	0.06-0.13	0-0.035	02-0.035	0.06-0.13
B-6A	0.82-0.95	0.20-0.40	0.92-1.02	0.80-0.95	0-0.25	0.06-0.10	0-0.035	0-0.035	0.06-0.10
B-7	0.35-0.40	0.17-0.37	0.7-0.8	0.9-1.0	0-0.25	0-0.30	0-0.035	0-0.035	0-0.30
BU	0.95-1.05	0.17-0.37	0.9-1.10	0.40-0.60	0-0.15	0-0.05	0-0.035	0-0.035	0-0.30
Gr15	0.95-1.05	0.15-0.35	0.20-0.40	1.30-1.65	0-0.25	0-0.10	0-0.027	0-0.020	0-0.10

3.Technical specification

Brand	Breakage rate	Hardness (HRC)	Impact value (J/cm²)	Drop times (times)	Micro structure
45#	<1%	≥45	≥12	≥8000	M+C
40Mn	<1%	≥50	≥12	≥10000	M+C
50Mn	<1%	≥55	≥12	≥10000	M+C
60Mn	<1%	≥55	≥12	≥12000	M+C
65Mn	<1%	≥58	≥12	≥12000	M+C
70Mn	<1%	≥60	≥12	≥12000	M+C
40Cr	<1%	≥55	≥12	≥12000	M+C
42CrMo	<1%	≥55	≥12	≥12000	M+C
70Cr2	<1%	≥58	≥12	≥12000	M+C
40Mn2	<1%	≥55	≥12	≥12000	M+C
70Mn2	<1%	≥58	≥12	≥12000	M+C
B-1	<1%	≥55	≥12	≥12000	M+C
B-2	<1%	≥58	≥12	≥15000	M+C
B-3	<1%	≥60	≥12	≥15000	M+C
B-4	<1%	≥60	≥12	≥15000	M+C
B-6	<1%	≥60	≥12	≥15000	M+C
B-6A	<1%	≥60	≥12	≥15000	M+C
B-7	<1%	≥60	≥12	≥15000	M+C
BU	<1%	≥60	≥12	≥15000	M+C
Gr15	<1%	≥60	≥12	≥15000	M+C