Grinding Media Ball / High Chrome Balls

Model	Chemical Composition
Model	C	Si	Mn	Cr	Mo	Cu	P	S
Low chrome grinding ball	2.2-3.5	≤1.2	≤1.5	0.8-2.5	≤1.0	≤0.5	≤0.15	≤0.15
Medium chrome grinding ball	2.0-3.3	≤1.2	≤1.8	2.5.0-9.0	≤1.5	≤1.0	≤0.15	≤0.15
High chrome grinding ball	1.6-3.3	≤1.0	≤2.5	10-18	≤1.0	≤1.5	≤0.10	≤0.10
Super High chrome grinding ball	2.0-3.3	≤1.0	≤2.5	22-25	≤2.0	≤1.5	≤0.10	≤0.10

Model	Mechanical properties		Metallurgical structure
Model	HRC	The degree of ball-drop	Metallurgical structure
Low chrome grinding ball	≥45	≥8000	P+C
Medium chrome grinding	≥50	≥12000	P+C
High chrome grinding ball	≥55	≥15000	M+C
Super High chrome grinding ball	≥60	≥22000	M+C