Substandard Semi- Friable Fused Alumina Details: ASF50 ASF50 produced by selected substandard Semi-friable Fused Alumina ingot,mostly using for economic grinding wheels or stone in DIY market.Chemical composition%(Grit 46) Last chapter:Substandard Regular Brown Fused Alumina Next Chapter:Substandard TC Monocrystalline Fused Alumina