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Balls of 15 : 40 mm diam. are cast from the following UCF alloys :
    • ARB – 12 with hardness of 62– 67 HRC
    • ARB – 19 with hardness of 60– 66 HRC
    • ARB – 42 with hardness of 62– 67 HRC

Note:Grinding balls of 50 , 60 mm diam. are cast from the alloy ARB – 11 with hardness of 60 – 65 HRC when used for second compartment .

Balls of 50 : 125 mm diam. are cast from the following UCF alloys :
    • ARB – 1 7 with hardness of 58 – 63 HRC
    • ARB – 22 with hardness of 60 – 64 HRC
      when used in first compartment and in single compartment mills
    • The alloy ARB – 22 is applied where superior wear resistance is necessary.
    • The superiority of ARB – 22 , compared with ARB – 17 , is mainly due to its microstructural features
      - Structure refinement
      - carbides volume fraction
    • Balls of 125 mm diam. are cast from the alloy ARB – 03 with hardness of 51 – 54 HRC.
    • For wet grinding application, UCF has its own ARB – 27 with hardness higher than 63 HRC.
  • ARW – 12 with hardness of 48 – 52 HRC.
  • ARW – 13 with hardness of 54 – 59 HRC
  • ARW – 06 with hardness of 48 – 51 HRC.
  • ARW – 52 & ARW – 54 with hardness of 190 – 230 HB that will be increased gradually after being subjected to service impacts due to work hardening phenomenon up to 55 HRC.
  • ARW – 27 with hardness of 52 – 57 HRC
  • ARW – 81 & ARW – 84 with hardness of 55 HRC min.
  • ARA – 10 with hardness of 46 – 49 HRC
  • ARA – 27 with hardness of 58 HRC min.
  • ARA – 19 with hardness of 59 – 63 HRC.
They are many alloys covering all temperature ranges needed for cement industry, the most famous of them are :
  • ARH – 07
  • ARH – 13
  • ARH – 43
  • ARH – 55
  • ARH – 56
  • ARH – 60
  • ARH – 61
  • ARH – 62
  • ARA – 70
  • ARA – 65
  • ARH – 80
  • ARWH – 25
  • ARWH – 26
  • ARWH – 28
  • ARWH – 30

Some of such alloys have other alloying additives for exhibiting outstanding heat resistance.

Optimum alloy selection depends upon service conditions at customer premises.