Appendix
SAE AS 4059
Like ISO 4406, SAE AS 4059 describes particle concentrations in liquids.
The analysis methods can be applied in the same manner as ISO 4406:1999.
The SAE cleanliness classes are based on particle size, number and
distribution. The particle size determined depends on the measurement
process and calibration; consequently the particle sizes are labeled with
letters (A-F).
The following table shows the cleanliness classes in relation to the particle
concentration determined:
SAE AS 4059 table
Maximum particle count / 100 ml
Size ISO 4402
> 1 µm
> 5 µm
> 15 µm
> 25 µm
> 50 µm
> 100 µm
Size ISO 11171
> 4 µm
(c)
> 6 µm
(c)
> 14 µm
(c)
> 21 µm
(c)
> 38 µm
(c)
> 70 µm
(c)
Size code
a
B
C
D
E
F
C
lasses
000
195
76
14
3
1
0
00
390
152
27
5
1
0
0
780
304
54
10
2
0
1
1,560
609
109
20
4
1
2
3,120
1,220
217
39
7
1
3
6,250
2,430
432
76
13
2
4
12,500
4,860
864
152
26
4
5
25,000
9,730
1,730
306
53
8
6
50,000
19,500
3,460
612
106
16
7
100,000
38,900
6,920
1,220
212
32
8
200,000
77,900
13,900
2,450
424
64
9
400,000
156,000
27,700
4,900
848
128
10
800,000
311,000
55,400
9,800
1,700
256
11
1,600,000
623,000
111,000
19,600
3,390
512
12
3,200,000
1,250,000
222,000
39,200
6,780
1,020
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BEWA FCU8111 3690427a en-us 2017-01-23.doc
2017-01-23
