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Zoom Mezzomerico Plant produces high Chrome cast grinding balls and cylpebs.

Balls having the following nominal diameters:
15 mm, 18 mm, 20 mm, 23 mm, 25 mm, 30 mm, 35 mm, 40 mm, 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, 100 mm, 110 mm, 120 mm.

Cylpebs having the following nominal dimensions:
12x12 mm, 16x16 mm, 19x19 mm, 22x22 mm, 25x25 mm, 30x30 mm , 35x35 mm.

They have a typical Rockwell C volumetric hardness of 60-67 depending on alloy and heat treatment.

The Allmax® 2nd chamber grade is typically specified for second (and third) chamber, cement clinker and raw grinding applications, where impact conditions are relatively low. The high hardness of this product offers excellent wear resistance.
Allmax® 1st chamber is normally used in first chamber cement applications, where the higher impact conditions demand a tougher, breakage resistant material, without sacrificing wear properties.
The alloys High Chrome Allmax® are examples in an alloy range used in mineral grinding and the mining industry where specific conditions exist that make lower chrome and forged balls uncompetitive. Examples would be in grinding applications where corrosion is a major contributor to the overall wear process or in areas with very low wear rates (rate of diameter loss).
Specification of these alloy types usually follows exhaustive on site testing.

Raw materials used in the manufacturing process:
Steel scrap
Copper scrap
Ferro alloys (Fe-Cr ; Fe-Si ; Fe-Mn)

The range of CPM high Chromium irons have a microstructure consisting of complex eutectic Chromium carbides (M7C3 type) in a high Carbon martensitic matrix, dispersed with fine secondary carbides. The volume of the Chromium carbides present is between 20 and 40%, depending on alloy chemistry and heat treatment. These carbides are extremely hard and provide the primary wear resistant phase, whilst the martensitic matrix is responsible for the impact resistance properties.