Brown Fused Alumina for Sand Castings
Enhance mold integrity, reduce casting defects, and improve thermal stability in precision sand casting applications.
Why Use BFA in Sand Casting Molds?
Brown fused alumina (BFA) is a high-strength refractory grain often used in molding sand blends for non-ferrous and steel castings. Its angular structure and thermal stability reduce deformation, prevent metal penetration, and ensure excellent surface finish in the final casting.
- High-temperature resistance during molten metal contact
- Improves mold rigidity and dimensional accuracy
- Recyclable with minimal grain breakdown
Common Applications in Casting
- Resin-coated shell molds and cores
- Precision aluminum and stainless steel castings
- Non-ferrous sand mold systems with high thermal load
Compatible with cold box, hot box, and no-bake binder systems.
Recommended Grain Sizes
- Mold base sand: 0.5–1.5 mm
- Shell molding: F30–F70
- Filler blends: F80–F150 for dense packing
Custom sizing and blending available for specific alloy and process needs.
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