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base oil
Blending
Gear oil
Test item | Quality index
|
Experimental method | |||||
---|---|---|---|---|---|---|---|
Appearance | Dark liquid | Dark liquid | Dark liquid | Visual | |||
Kinematic viscosity(40℃)/mm2/S | 135∼165 | 198∼242 | 288∼352 | GB/T265 | |||
Flash point (opening)/℃ | ≥200 | ≥205 | ≥210 | GB/T267 | |||
Pour point/℃ | ≤-20 | ≤-20 | ≤-20 | GB/T3535 | |||
Water content/% | mark | mark | mark | GB/T260 | |||
Water soluble acid or alkali% | nothing | nothing | nothing | GB/T259 | |||
Volatile parts(150℃,90min)% | ≤1.7 | ≤1.7 | ≤1.7 | GB/T7325 | |||
viscosity index | ≥98 | ≥98 | ≥98 | GB/T1995 | |||
Mechanical impurities% | ≤0.05 | ≤0.05 | ≤0.05 | GB/T511 | |||
Acid value(mgKOH/g)% | ≤0.05 | ≤0.05 | ≤0.05 | GB/T264 |