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base oil
Blending
Mechanical oil
Test item | Quality index
|
Experimental method | |||||||
---|---|---|---|---|---|---|---|---|---|
Appearance | Pale yellow liquid | Pale yellow liquid | Pale yellow liquid | Pale yellow liquid | Visual | ||||
Kinematic viscosity(40℃)/mm2/S | 28.8∼35.2 | 41.4∼50.6 | 61.2∼74.8 | 90∼110 | GB/T265 | ||||
Flash point (opening)/℃ | ≥185 | ≥190 | ≥195 | ≥200 | GB/T267 | ||||
Pour point/℃ | ≤-20 | ≤-20 | ≤-20 | ≤-20 | GB/T3535 | ||||
Water content/% | mark | mark | mark | mark | GB/T260 | ||||
Water soluble acid or alkali% | 无 | 无 | 无 | 无 | GB/T259 | ||||
Volatile parts(150℃,90min)% | ≤1.7 | ≤1.7 | ≤1.7 | ≤1.7 | GB/T7325 | ||||
viscosity index | ≥90 | ≥90 | ≥90 | ≥90 | GB/T1995 | ||||
Mechanical impurities% | ≤0.05 | ≤0.05 | ≤0.05 | ≤0.05 | GB/T511 | ||||
Acid value(mgKOH/g)% | ≤0.07 | ≤0.07 | ≤0.07 | ≤0.07 | GB/T264 |