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Comparison table of abrasives symbols

Abrasives	SUN-AB	China (GB/T 2476-1994)	Japan (JIS R6111-1987)	Norton U.S.A.	Universal Co. England	GFR	USSR ( ґOCT2424-75)	ISO
Brown aluminum oxide	A	A	A	A	A	NK	Э 16A-12A	A
White aluminum oxide	WA	WA	WA	38A,WA	WA	EK	ЭB 25A-22A	WA
Microcrystal Aluminum oxide	MA	MA	TA(Showa Denko K. K.)	44A,SH	T
Pink Aluminum oxide	PA	PA	PA	PA, PW		FA	ЭX 34A-32A
Single crystal aluminum oxide	SA	SA	HA	32A, DA			M 45A-43A
Zirconia alumina	ZA	ZA	AZ, RG, RA	ZF, ZS	Z
Black aluminum oxide	BA	BA
Black Silicon carbide	BC	C	C	37C	BC	BC	KЧ 55C-52C	C
Green Silicon carbide	GC	GC	GC	39C	C	SCG	KЭ 64C-62C	GC
Cubic silicon carbide	SC	SC
Boron carbide	BC	BC					B₄C