Forged steel grinding media balls in Basic Parameters
1) No deformation
2) High hardness Good wear resistant
3) Size:Dia20mm-150mm
4) Breakage<1%
5) Certification: ISO9001,SGS.

Specification:
PRODUCTS SURFACE
HARDNESS CORE
HARDNESS CHEMICAL COMPOSITION
1) 60Mn Forged grinding ball HRC58-65 ≥HRC45 C: 0.52-0.65; Si: 0.15-0.37; Mn: 0.6-1.2;
S & P: 0.04Max; Cr: 0.25Max
2) B2 Forged grinding ball HRC60-68 ≥HRC55 C: 0.75-0.90; Si:0.17-0.37; Mn:0.7-0.9;
P: 0.035 MAX; S: 0.035MAX; Cr:0.40-0.70.
3) B3 Forged grinding ball HRC60-68 ≥HRC55 C:0.55-0.65; Si:0.2-0.37; Mn:0.75-0.9;
Cr:0.85-1.2;S/P≤0.03;
4) B4 Forged grinding ball HRC60-68 ≥HRC58 C:0.58-0.66; Si:1.6-1.9; Mn:0.65-0.80; Cr:0.7-0.9; S/P≤0.03;
5) High chrome cast grinding ball HRC60-65 ≥HRC58 Cr:11-27; C: 2.0-3.0; Si:1.0Max; Mn: 0.5-1.5;
S & P:0.10Max;
6) Low chrome cast grinding ball HRC48-55 ≥HRC46 Cr:1-3; C: 2.2-3.6; Si:1.0Max; Mn: 0.5-1.5;
S & P:0.10Max;
7) Medium chrome cast grinding ball HRC55-63 ≥HRC55 Cr:4-10; C: 2.2-3.6; Si:1.0Max; Mn: 0.5-1.5;
S & P:0.10Max;

Feature:
1) High Hardness: The surface hardness of forged and rolling balls is to 60-65 HRC and volume hardness is to 60-63 HRC
2) High Impact Toughness: The impact toughness is more than 12 J/cm2;
3) Low Broken Rate: The actual broken rate is not higher than 1%;
4) Even Wear-resistance: The loss of ball round rate is 50-300 g/ton.