Kinematic viscosity for industrial oils according to ISO 3448
In the 1970s, the well-known standardization institutes ISO (International Standards Organization), ASTM (American Society for Testing and Materials), DIN (Deutsches Institut für Normung = German Institute for Standardization), and others, started an attempt to create a common viscosity classification. The result is known as the International Standards Organisation Viscosity Grade - ISO VG.
This classification applies mainly for use with industrial lubrication. The viscosity of each grade ranges ± 10 % from the mid-point. The step inbetween two subsequent viscosity grades is approx. 50 % of the lower one. The temperature of 40 °C is related to the operating temperature in machinery.
| ISO 3448 Viscosity Class [40 °C] | Kin. Viscosity [mm²/s] Mid-point | Kin. Viscosity [mm²/s] Minimum | Kin. Viscosity [mm²/s] Maximum |
|---|---|---|---|
| ISO VG 2 | 2.2 | 1.98 | 2.42 |
| ISO VG 3 | 3.2 | 2.88 | 3.52 |
| ISO VG 5 | 4.6 | 4.14 | 5.06 |
| ISO VG 7 | 6.8 | 6.12 | 7.48 |
| ISO VG 10 | 10 | 9 | 11 |
| ISO VG 15 | 15 | 13.5 | 16.5 |
| ISO VG 22 | 22 | 19.8 | 24.2 |
| ISO VG 32 | 32 | 28.8 | 35.2 |
| ISO VG 46 | 46 | 41.4 | 50.6 |
| ISO VG 68 | 68 | 61.2 | 74.8 |
| ISO VG 100 | 100 | 90 | 110 |
| ISO VG 150 | 150 | 135 | 165 |
| ISO VG 220 | 220 | 198 | 242 |
| ISO VG 320 | 320 | 288 | 352 |
| ISO VG 460 | 460 | 414 | 506 |
| ISO VG 680 | 680 | 612 | 748 |
| ISO VG 1000 | 1000 | 900 | 1100 |
| ISO VG 1500 | 1500 | 1350 | 1650 |
ISO 3448
| Reference | ISO 3448 |
|---|---|
| Kin. vis. | yes |
| Dyn. vis. | no |
| Density | no |
| Multiple temperatures | no |
| Related | Kinematic viscosity, viscosity, industrial oil, lubricant, lube oil, ISO 3448, viscosity grade |
