Comparison Chart of Superhard Materials' Grain Size
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CHINA

GB 6406-86

INTERNATIONAL

ISO 6106-1979

FEPA @AMERICA

ANSI B74. 16-1971

JAPAN

JIS 4130-1982

WEST GERMANY

DIN 848-1988

RUSSIA

rOCT 9206-80

Grit No. Grain  Size Grit No. 1 Grit No. 2 Grain Size Grit No. Grain Size @Grit No. Grain Size Grit No. Grain Size Grit No. Grain Size Girt No. Grain Size
1O/18 1180/1000 @1181 16/18 1180/1000 D1181 1180/1000 16/18 1180/1000 16/18 1180/1000 D1180 1180/1000 2500/2000 2500/2000
18/20 1000/850 @1001 18/20 1000/850 D1001 1000/850 18/20 1000/850 18/20 1000/850 D1001 1000/850 2000/1600 2000/1600
20/25 850/710 @851 - 850/710 D851 850/710 20/30 850/600 20/30 850/600 D851 850/710 1600/1250 1600/1250
25/30 710/600 @711 - 710/600 D711 710/600 D711 710/600 1250/1000 1250/1000
30/35 600/500 @601 - 600/500 D601 600/500 30/40 600/425 30/40 600/425 D601 600/500 1000/800 1000/800
35/40 500/425 @501 - 500/425 D501 500/425 D501 500/425 800/630 800/630
40/45 425/355 @426 - 425/355 D426 425/355 40/50 425/300 40/50 425/300 D426 425/355 630/500 630/500
45/50 355/300 @356 - 355/300 D356 355/300 D356 355/300 500/400 500/400
50/60 300/250 @301 50/60 300/250 D301 300/250 50/60 300/250 50/60 300/250 D301 300/250 400/315 400/315
60/70 250/212 @251 - 250/212 D251 250/212 60/80 250/180 60/80 250/180 D251 250/212 315/250 315/250
70/80 212/180 @213 - 212/180 D213 212/180 D213 212/180 250/200 250/200
80/100 180/150 @181 80/100 180/150 D181 180/150 80/100 180/150 80/100 180/150 D181 180/150 200/160 200/160
100/120 150/125 @151 100/120 150/125 D151 150/125 100/120 150/125 100/120 150/125 D151 150/125 160/125 160/125
120/140 125/106 @126 120/140 125/106 D126 125/106 120/140 125/106 120/140 125/106 D126 125/106 125/100 125/100
140/170 106/90 @107 140/170 106/90 D107 106/90 140/170 106/90 140/170 106/90 D107 106/90 100/80 100/80
170/200 90/75 @91 170/200 90/75 D91 90/75 170/200 90/75 170/200 90/75 D91 90/75 80/63 80/63
200/230 75/63 @76 200/230 75/63 D76 75/63 200/230 75/63 200/230 75/63 D76 75/63 63/50 63/50
230/270 63/53 @64 230/270 63/53 D64 63/53 230/270 63/53 230/270 63/53 D64 63/53 50/40 50/40
270/325 53/45 @54 270/325 53/45 D54 53/45 270/325 53/45 270/325 53/45 D54 53/45 @
325/400 45/38 @46 325/400 45/38 D46 45/38 325/400 45/38 325/400 45/38 D46 45/38 @ @

Note : 1. British standard BS5851-1980 is equivalent to ISO 6106-1971.

           2. Grain size is in accordance with mesh size of ISO565.

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