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Range of Metals
  • Ferrous & Non-Ferrous done under one roof
  • Casting done according to customers need
  • Castings ranging from 1Kg to 1Ton
  • Bullet 1
High Chrome Grinding Media
Yellow Star Manufacturing is a renowned High Chrome Grinding Media supplier in South Africa. We manufacture quality High Chrome Grinding Media according to customer specification using sustainable foundry technology. We offer various sizes of grinding media balls ranging from 30mm up to 90mm.

Product range:
30mm; 35mm; 40mm; 50mm; 60mm; 70mm; 80mm; 90mm
Mill Inspection Services:
  • Media consumption measurement
  • Mill liner inspections
  • Yield improvement projects and recommendations
  • Cost efficiency improvements
  • Metallurgical Support
  • Process Optimisation
  • Continuous Quality Improvement
Lost Foam Castings
Lost Foam Metal Casting Technology Process Capabilities

Yellow Star makes use of Lost Foam Metal Casting Process Technology to produces high quality ferrous and non-ferrous castings and associated products for the engineering, mining and industrial markets. As the name suggests the process uses a moulded Polystyrene Foam Pattern which is further processed to form an inert, fired ceramic mould. The moulded Polystyrene Foam Pattern is dimensionally accurate and has an even smooth surface finish.
With the use of sophisticated aluminium tools/moulds/dies Polystyrene Foam Patterns with no parting lines, no cores, and zero draft angles can be moulded. In case of extremely complex castings the Polystyrene Foam Pattern can be easily glued together to create the intricate challenging surfaces.

In short the lost foam casting process achieves the quality and precision of the traditional investment casting process that was limited to small castings in larger castings too.
Casting Alloys
Cast Iron
Grey Iron, Ferrite/Pearlite Ductile Iron, High-Nickel Ductile Iron, Hi-Chrome White Iron
Cast Steel
Stainless Steel, Carbon Steel, Tool Steel, Hi-Manganese Steel, Heat-resistant Steel
Non Ferrous
Aluminum alloy, Bronze, Brass
Heat Treatment
  • Harden And Temper
  • Normalising And Annealing
  • Carbon Restoration
Metallurgical Services
Chemical Analysis


Tests:

  • Hardness
  • Metallurgical
  • Impact
  • Tensile
  • Non-Destructive
Evaluations:

  • Case Depth
  • Grain Size & Cleanliness
  • Macro / Microscopic

Failure Investigations & Reporting

Metallurgical Advice
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