Steel ball

Forged Steel Ball Parameters and Specifications

Material	C	Si	Mn	Cr	Cu	Mo	P	S
45#	0.42-0.50	0.17-0.37	0.50-0.80	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035
50Mn	0.48-0.56	0.17-0.37	0.60-1.00	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035
60Mn	0.57-0.65	0.17-0.37	0.70-1.00	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035
65Mn	0.62-0.70	0.17-0.37	0.90-1.00	0-0.25	0-0.25	0-0.30	0-0.035	0-0.035
40Mn	0.37-0.44	0.17-0.37	0.70-1.00	0-0.25	0-0.25		0-0.035	0-0.035
B-2	0.70-0.80	0.17-0.37	0.70-0.80	0.50-0.80	0-0.25	0-0.30	0-0.035	0-0.035
B-3	0.58-0.66	1.60-1.90	0.65-0.80	0.70-0.90	0-0.25	0-0.30	0-0.035	0-0.035

Specification	Tolerance	Single Weight	Number of forged balls per ton	Metallographic Structure
Φ20	+1 -0.5	33	30303	Martensite + Bainite + Carbide
Φ25	+1.5 -0.5	64	15625
Φ30	+1.5 -0.5	110	9090
Φ40	+2 -1	260	3846
Φ50	+2 -1	510	1961
Φ60	+2 -1	890	1124
Φ70	+3 -2	1400	714
Φ80	+3 -2	2100	476
Φ90	+3 -2	3000	333
Φ100	+3 -2	4100	244
Φ110	+4 -3	5470	183
Φ120	+4 -3	7100	141
Φ130	+4 -3	9020	111

Casting Steel Ball Parameters and Specifications

Material	Cr	C	Si	Mn	P	S	Mo	Metallographic Structure
Low Cr	1.5-3.0	2.2-3.5	≤1.2	0.5-1.5	≤0.070	≤0.060	≤0.25	P+C
Mid Cr	5.0-9.0	2.2-3.2	≤1.2	0.5-1.5	≤0.070	≤0.060	≤0.25	P+C
High Cr	10-13	2.2-3.2	≤1.0	0.5-2.0	≤0.070	≤0.060	≤0.25	M+C
Extra High Cr A	14-16	2.2-3.0	≤1.0	0.5-2.0	≤0.070	≤0.060	≤0.25	M+C
Extra High Cr B	17-22	2.0-3.8	≤1.0	0.5-2.0	≤0.070	≤0.060	≤0.25	M+C
Extra High Cr C	23-30	2.0-3.8	≤1.0	0.5-2.0	≤0.070	≤0.060	≤0.25	M+C

Specification	Tolerance	Single Weight	Number of forged balls per ton
Φ20	+1 -0.5	33	30303
Φ25	+1 -0.5	64	15625
Φ30	+1 -0.5	110	9090
Φ40	+2 -1	261	3831
Φ50	+2 -1	510	1961
Φ60	+2 -1	883	1132
Φ70	+2 -1	1402	713
Φ80	+2 -1	2092	478
Φ90	+2 -1	2980	335
Φ100	+3 -1	4087	244
Φ110	+3 -1	5440	183
Φ120	+3 -1	7062	141

Steel Ball Application

1. Mechanical manufacturing: Steel balls are widely used to make mechanical parts such as bearings, transmission chains, couplings, as well as transmission media and spare parts of machines, such as rolling bearings, welding coils, clamping tools, etc.
2. Metallurgical field: Steel balls are often used to make steel processing equipment, such as media, mixers and filters in high-temperature smelting processes.
3. Aerospace: Steel balls have important application value in the aerospace field, such as manufacturing rocket propulsion nozzle materials, bearings, shock absorbers and other key parts to improve the overall performance of aircraft.
4. Construction industry: Steel balls can be used in building decoration and guardrail railing structures in the construction industry.
5. Crushing industry and bearing industry: Steel balls are the most important components of these industries, such as used to manufacture high-speed, low-noise special bearings, high-precision, low-noise motor bearings, household appliance bearings, etc.
Widely used in iron ore and non-ferrous metal mine concentrators, cement plants, thermal power plants, refractory materials plants, steel plants, phosphate fertilizer plants and other grinding industries.