It is a derivative of brown corundum, and its appearance is black. It is characterized by low alumina content and a certain amount of iron oxide (about 10%), so it has low hardness but good toughness. It is mostly used for free grinding, such as grinding or rough grinding before electroplating. oil stone for polishing is also used for making coated abrasives, resin cutting pieces, etc.
Length: 150mm
Other Raw Materials: White Fused Alumina (WA)/Microcrystalline Fused Alumina (MA)/Single Crystal Corundum (SA)/Black Corundum (BA)/Green Silicon Carbide (GC)/Chrome Corundum (PA)/Zircon Corundum (ZA)/Black Silicon Carbide (C)
Aluminium
Other non-ferrous metals
Stainless steel (INOX)
Hardened, heat-treated steels over 1,200 N/mm2 (over 38 HRC)
Surface work
Rounding
Work on edges
Polishing
Fine finishing
Fine grinding in multiple steps
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