High chrome casting iron balls, Low chrome casting iron balls

1.CHEMICAL COMPOSITION OF CASTING BALL

Items	Brand	Chemical Composition（%）
		C	Si	Mn	Cr	Mo	Cu	Ni	P	S
High chrome casting iron ball	ZQCr20	2.0～3.0	≤1.0	0.5～1.5	18～22	0～2.5	0～1.2	0～1.5	≤0.10	≤0.10
High chrome casting iron ball	ZQCr15	2.0～3.0	≤1.0	0.5～1.5	12～17	0～3.0	0～1.0	0～1.5	≤0.10	≤0.10
High chrome casting iron ball	ZQCr13	2.0～3.0	≤1.0	0.5～1.5	11～14	0～1.0	0～2.0	0～1.5	≤0.10	≤0.10
Middle chrome casting iron ball	ZQCr7	2.1～3.2	0.5～2.2	0.5～1.5	6～10	0～1.0	0～0.8	0～1.5	≤0.10	≤0.10
Low chrome casting iron ball	ZQCr2	2.2～3.6	≤1.2	0.5～1.5	1.0～3.0	0～1.0	0～0.8	——	≤0.10	≤0.10
Bainite ductile casting iron ball	ZQSi3	3.2～3.8	2.0～3.5	2.0～3.0	——	——	——	——	≤0.10	≤0.03

2.MECHANICAL PROPERTIES

Items	Brand	Surface hardness（HRC）		Endurance impact test(Times)
		Quenched	Unquenched
High chrome casting iron ball	ZQCr20	≥56	≥45	≥8000
High chrome casting iron ball	ZQCr15	≥56	≥45	≥8000
High chrome casting iron ball	ZQCr13	≥56	≥49	≥8000
Middle chrome casting iron ball	ZQCr7	—	≥48	≥8000
Low chrome casting iron ball	ZQCr2	—	≥45	≥8000
Bainite ductile casting iron ball	ZQSi3	≥50	—	≥8000

3.SIZES OF CASTING BALLS

Items

SIZES

F17

F20

F25

F30

F40

F50

F60

F70

F80

F90

F100

F110

F120

F130

Tolerance

+1.0 -1.0

+2.0 -1.0

+3.0 -1.0

+3.5 -1.5

Difference beitween max diam and min diam

≤1.0

≤2.0

≤3.0

≤4.0

4.Product performance:No Deforamtion,No breakage,Lowerr wear rate Longer Lasting Chromium,Uniformity of hardness from surface to core.

5.Application fields:Industries of cement building material,metallurgical selection in mine,grinding coal in power plant,chemical industry and machinery,etc.