Comparative Chart of Diamond Grain Size Range
CHINA GB/T6406-1995
|
ISO
|
FEPA
|
U.S.A ANSI B74.16-1971
|
JAPAN JIS4130-1988
|
GERMANY DIN848-1988
|
RUSSIA ГOCT9206-80
| ||||||||
Grain No.
|
Grain Size
|
Grain No1
|
Grain No2
|
Grain Size
|
Grain No.
|
Grain Size
|
Grain No.
|
Grain Size
|
Grain No.
|
Grain Size
|
Grain No.
|
Grain Size
|
Grain No.
|
Grain Size
|
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
|
D180
|
180/150
|
80/100
|
180/150
|
80/100
|
180/150
|
D180
|
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
| ||
Informative blog. Thanks for sharing information. grain sizing
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