unbreakable grinding media balls 25-150mm 60HRC

Item

Designation

C

Si

Mn

Cr

S

P

Mo

High-Cr-Ball

ZQCr20

2.0-3.2

≤1.0

≤1.5

19-22

≤0.08

≤0.06

≤1.0

ZQCr17

2.0-3.2

≤1.0

≤1.5

15-18

≤0.08

≤0.06

≤1.0

ZQCr11

2.0-3.2

≤1.0

≤1.5

10-13

≤0.08

≤0.06

≤1.0

Low-Cr-Ball

ZQCr2-6

2.0-3.5

≤1.0

≤1.5

1.5-3.5

≤0.08

≤0.06

≤1.0

Item

Designation

Hardness(HRC)

Impact

Toughness

ak(j/cm²)

Microstructure

Service Life

(Times of falling)

Wear Rate

Breackage

Heat

treatment

Cast

High-Cr-Ball

ZQCr20

55-65

≥50

≥4.0

M+C

≥8000

≤25

≤0.5

ZQCr17

55-65

≥50

≥4.0

ZQCr11

55-65

≥50

≥4.0

≤30

Low-Cr-Ball

ZQCr2-6

≥45

≥2.5

P+C

≥5000

≤1.0

Item

Sizes

Φ17

Φ20

Φ25

       Φ30

Φ40

Φ50

Φ60

Φ70

Φ80

Φ90

Φ100

Φ110

Φ120

Φ130

Tolerance

+1.0

+2.0

+3.0

+3.5

-1.0

-1.0

-1.0

-1.5

Difference Between

the Max & the Min Dia.

≤1.0

≤2.0

≤3.0

≤4.0