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ISO Viscosity Classification

Kinematic viscosity for industrial oils according to ISO 3448

Description

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.

Viscosity Table – Measurement data

Industrial oils - ISO 3448

ISO 3448 Viscosity Class[°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

Reference

ISO 3448

Metainformation

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