low price grinding steel ball

Product Description SPECIFICATION:

1,low Chrome :

Chemical composition (%) : Cr :1.5-3.0, C: 2.2-3.5, Si:  ≤1.2, Mn:0.5-1.5, P:  ≤0.070, S:  ≤0.060, Mo:  ≤0.25

Ball diameter: 20-60mm :

Surface Hardness: 50 min HRC

Core Hardness: 48min HRC

Ball diameter: 70-120mm:

Surface Hardness: 48min HRC

Core Hardness: 46min HRC

 

2,Medium Chrome :

 Chemical composition (%) : Cr :5.0-9.0, C: 2.2-3.2, Si:  ≤1.2, Mn:0.5-1.5, P:  ≤0.070, S:  ≤0.060, Mo:  ≤0.25

 Ball diameter: 20-60mm :

 Surface Hardness: 52 min HRC

 Core Hardness: 50min HRC

 Ball diameter: 70-120mm:

 Surface Hardness: 50min HRC

 Core Hardness: 48min HRC.

 

3,High Chrome:

 Chemical composition (%) : Cr :10.0-14.0, C: 2.2-3.2, Si:  ≤1.0, Mn:0.5-2.0, P:  ≤0.070, S:  ≤0.060, Mo:  ≤0.25

 Ball diameter: 20-60mm :

 Surface Hardness: 60 min HRC

 Core Hardness: 58min HRC

 Ball diameter: 70-120mm:

 Surface Hardness: 60min HRC

 Core Hardness: 57min HRC.

 

4, Ultra-high Chrome A

Chemical composition (%) : Cr :15.0-16.0, C: 2.2-3.0, Si:  ≤1.0, Mn:0.5-2.0, P:  ≤0.070, S:  ≤0.060, Mo:  ≤0.25

 Ball diameter: 20-60mm :

 Surface Hardness: 60 min HRC

 Core Hardness: 58min HRC

 Ball diameter: 70-120mm:

 Surface Hardness: 60min HRC

 Core Hardness: 58min HRC.

 

5,Ultra-high Chrome B

Chemical composition (%) : Cr :17.0-22.0, C: 2.0-2.8, Si:  ≤1.0, Mn:0.5-2.0, P:  ≤0.070, S:  ≤0.060, Mo:  ≤0.25

 Ball diameter: 20-60mm :

 Surface Hardness: 60 min HRC

 Core Hardness: 58min HRC

 Ball diameter: 70-120mm:

 Surface Hardness: 60min HRC

 Core Hardness: 58min HRC.

 

 

6,Ultra-high Chrome C

 Chemical composition (%) : Cr :23.0-30.0, C: 2.0-2.8, Si:  ≤1.0, Mn:0.5-2.0, P:  ≤0.070, S:  ≤0.060, Mo:  ≤0.25

 Ball diameter: 20-60mm :

 Surface Hardness: 60 min HRC

 Core Hardness: 58min HRC

 Ball diameter: 70-120mm:

 Surface Hardness: 60min HRC

 Core Hardness: 58min HRC.

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