AFS45-55 Chromite Sand Casting Sand
Chromite sand is a specialized foundry sand used in sand casting due to its unique properties. Here’s what you need to know:
1. What is Chromite Sand?
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A naturally occurring chrome-based refractory sand (FeCr₂O₄).
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High melting point (~2,150°C / 3,902°F).
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High thermal conductivity (faster cooling than silica sand).
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Chemically inert, resistant to metal penetration.
2. Advantages in Sand Casting
✔ Heat Resistance – Excellent for high-temperature alloys (steel, stainless steel, high-chrome iron).
✔ Low Thermal Expansion – Reduces veining and burn-in defects.
✔ Good Flowability – Easy to ram and mold.
✔ Reduces Silica Hazards – No risk of silicosis (unlike silica sand).
3. Common Applications
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Cores & Molds – Used in contact with molten metal for better surface finish.
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Backing Sand – Mixed with silica or zircon sand to reduce costs.
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Large Castings – Helps control solidification rates.
