- HM/HLP hydraulics
ISO VG 46
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Hydraulic oil HLP — DIN 51524, part 2
HLP oils, mineral oils with oxidation, corrosion and antiwear additives; the most quoted reference in industrial hydraulics.
Hydraulic oil, type H HM — ISO 11158
The international standard for mineral hydraulic fluids; class HM is the antiwear oil, the ISO counterpart of DIN 51524-2 HLP.
ASTM D6158, type HM — antiwear hydraulic oil
The American standard for mineral HM hydraulic oils (with antiwear additives), equivalent to DIN 51524-2 HLP and ISO 11158 HM.
GB 11118.1 L-HM — hydraulic oil (China)
The Chinese national standard for hydraulic fluids; class L-HM is the antiwear oil, with a high-pressure variant.
| Property | Typical value | Method |
|---|---|---|
| ISO viscosity grade | 46 | ISO 3448 |
| Fluid type (ISO classification) | HM | ISO 6743-4 |
| Kinematic viscosity @0°Cmm2/s | 541 | ASTM D445 |
| Kinematic viscosity @40°Cmm2/s | 45.7 | ASTM D445 |
| Kinematic viscosity @100°Cmm2/s | 6.9 | ASTM D445 |
| Viscosity index | 106 | ISO 2909 |
| Density @15°Ckg/m3 | 866 | ISO 12185 |
| Flash point (COC)°C | 228 | ASTM D92 |
| Pour point°C | -36 | ISO 3016 |

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