Grinding Media

Selecting the proper media for grinding and milling operations is essential. Grinding media is used in these processes to grind or crush material to both reduce particle size and refine material. Grinding media is available in a broad variety of materials and sizes. Which media is appropriate depends on the specifics of the intended application.

Mixing, crushing, dispersing, and purifying variable materials generally requires some type of grinding media ball. Various properties influence how the work material is processed and how long the media can be used for. Many facets of grinding media can be customized, such as:

  • Material composition
  • Density
  • Bulk density
  • Hardness
  • Surface finish
  • Color

Normally, carbon steel balls are used for common low speed grain grinding such as metal or chemical powders. For high speed ball mill grinding process such as paints, inks or resin powders, chrome alloy steel balls are usually used for extended durability.

Our special heat treating processes ( CQI-9) guarantee a much better durability of grinding media which is approved by customers not only in the ink but also pigment, paste, ferrite and food industries. We have been providing customers worldwide directly with our products saving substantial amount of money. If you are not sure what media you need, we offer free consultations to make sure you get the perfect product for your operation.

Chemical Composition

Steel %C %Si %Mn %P %S %Cr %Ni %N %Mo
AISI 52100 0.95-1.10 0.35 max 0.20-0.50 0.025 max 0.025 max 1.30-1.60 - - -
AISI 1010/1015 0.08-0.18 0.10-0.35 0.30-0.60 0.040 max 0.050 max - - - -
AISI 1085 0.80-0.93 0.10-0.35 0.70-1.00 0.040 max 0.050 max - - - -
AISI 304/304L 0.080 max 1.00 max 2.00 max 0.045 max 0.030 max 17.00-20.00 8.00-10.50 0.100 max -
AISI 316/316L 0.080 max 1.00 max 2.00 max 0.045 max 0.030 max 16.00-18.00 10.00-14.00 - 2.00-3.00
AISI 420(A-B-C) 0.16-0.50 1.00 max 1.50 max 0.040 max 0.030 max 12.00-14.50 - - -
AISI 440C 0.95-1.20 1.00 max 1.00 max 0.040 max 0.030 max 16.00-18.00 - - 0.75 max

Technical Characteristics / Availability

Description Sizes Available Density [g/cm3] Hardness Relative cost
Chrome Steel Balls (AISI 52100) 1MM-76.50MM 7.80 60 – 66 HRc Moderate
Low Carbon Steel Balls (AISI 1010/1015) 1MM-76.50MM 7.82 55 – 65 HRc Low
High Carbon Steel Balls (AISI 1085) 1MM-76.50MM 7.85 59 – 66 HRc Low to Moderate
Stainless Steel Balls (AISI 304/304L) 1MM-76.50MM 7.95 20 – 39 HRc High
Stainless Steel Balls (AISI 316/316L) 1MM-76.50MM 7.95 20 – 39 HRc High
Stainless Steel Balls (AISI 420(A-B-C) 1MM-76.50MM 7.74 48 – 60 HRc Moderate
Stainless Steel Balls (AISI 440C) 1MM-76.50MM 7.70 57 – 65 HRc High
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