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 250/212 315/2...