These gradations are our base gradations; additional gradations can be blended to meet your specifications, at no additional cost.

All values shown are averages and do not necessarily reflect a specific sample.

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material gradesieve size
(U.S. standard)		opening
(mm)		cum. %
retained		% passing
6/204
6
8
12
14
16
18
20
25
30
40
50		4.76
4.76
2.38
1.68
1.410
1.190
1.000
0.840
0.710
0.590
0.420
0.297		-
0.1
2.1
14.2
29.6
51.5
79.3
94.0
97.6
98.7
99.5
99.8		-
99.9
97.9
85.8
70.4
48.5
20.7
6.0
2.4
1.3
0.5
0.2
20/308
12
16
18
20
25
30
35
40
50		2.38
1.68
1.19
1.00
0.84
0.710
0.590
0.500
0.420
0.297		-
-
0.5
5.8
26.7
58.3
86.2
96.4
98.8
99.8		-
-
99.5
94.2
73.3
41.7
13.8
3.6
1.2
0.2
30/4518
20
25
30
35
40
45
50
60
70
100		1.00
0.84
0.71
0.59
0.500
0.420
0.350
0.297
0.250
0.210
0.149		-
0.3
1.4
13.2
50.6
81.7
93.3
98.2
99.6
99.8
100.0		-
99.7
98.6
86.8
49.4
18.3
6.7
1.8
0.4
0.2
0.0
40F20
30
40
45
50
60
70
80
100
140
200		0.84
0.59
0.42
0.35
0.297
0.250
0.210
0.177
0.149
0.105
0.074		-
0.1
7.1
23.4
46.8
71.6
81.9
92.3
97.3
98.6
99.9		-
99.9
92.9
76.6
53.2
28.4
18.1
7.7
2.7
1.4
0.1