Steloy Castings operates three foundry plants, Cobalt Street, Tungsten Street and Chamdor, with a combined floor space of 20000m2.
To produce a wide range of castings in most material types and to the highest standards, our foundries are equipped with the most modern foundry equipment, taking advantage of the world's latest technologies and combining this with the needs of the market place. Equipment includes medium frequency induction furnaces, emission spectrometers, sand mixers, gas fired heat treatment furnaces coupled to aerated quench facilities as well as fully equipped pattern shops, shot blast machines and associated equipment. On the centrifugal casting side, equipment also includes horizontal spinning, pull boring and specialist machining, welding and fabrication facilities.
The main activities and products of the three plants can be summarised as follows (please see the Material Guide for more detailed information on processes and products):
Cobalt Street Plant, Bronkhorstspruit (Visual Tour)
- Administrative headquarters.
- Utilises induction melting furnaces and resin bonded sand moulding to produce static castings for the pump and valve, petrochemical, pulp and paper, steel and cement industries.
- Primary products are cast from materials that include corrosion resistant alloys (stainless steel and nickel based), low alloy steels and heat resistant alloys.
- Major product types: casings, valve bodies, impellers, tube sheets & brackets, tube supports, flanges & brackets, return bends, Y-pieces.
- Component size is typically 2kg to 100kg, with a maximum of 2000kg.
- Plant capacity: 1000 tons per annum.
- Staff size: 160.
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Chamdor Plant, Krugersdorp
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- Includes South Africa's only stainless steel spun/centrifugal casting plant.
- Produces static castings and spun cast tube, the latter mainly for the petrochemical sector.
- Utilises induction melting furnaces and resin bonded sand moulding for static castings and horizontal centrifugal casting to produce spun tube.
- Static castings are produced in stainless steels, heat resistant steel, nickel based alloys, carbon steels and low alloy steels.
- Centrifugal castings are produced in corrosion resistant and heat resistant stainless steels (for petrochemical applications in particular) and alloy steels, which include alternatives to wrought hollow bar.
- Major product types: casings, impellers, valve bodies, liner plates, tube sheets, spun cast tube (high temperature, corrosion resistant and low alloy).
- Component size is typically 0.5kg to 3500kg for sand castings and 40kg to 2200kg for spun cast tubes. Steloy currently casts large diameter tubes of up to Ø830mm x ±2000mm long. Smaller diameter are typically up to 4200mm long and have an outer diameter (OD) of 80-200mm and inner diameter (ID) as small as 40mm. Pull boring can typically be applied to machine the inner diameter of a 155mm OD x 122mm ID tube to 131mm ID, which then yields a typical mean sound wall (MSW) of 12mm.
- Offers a complete fabrication service for the petrochemical sector in conjunction with approved partners.
- Plant capacity: 1950 tons per annum.
- Staff size: 120.
Tungsten Street Plant, Bronkhorstspruit
- Utilises induction melting furnaces and resin bonded sand moulding to produce static castings in cast irons, nodular irons, steels and low alloy steels for the glass, railway and ferro alloy industry.
- Provides backup capacity for the production of stainless steel and heat resistant steel castings.
- Major product types: ingot moulds, liner plates, casings, valve bodies, tube sheets, glass moulds, railway components.
- Component size is typically 2kg to 300kg, with a maximum of 2500kg.
- Plant capacity: 2400 tons per annum.
- Staff size: 120
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