ASTM D 4684-2008 标准详情
- 标准号:ASTM D 4684-2008
- 中文标题:发动机油在低温下表观粘度和弯曲应力测定的试验方法
- 英文标题:standard test method for determination of yield stress and apparent viscosity of engine oils at low temperature
- 标准类别:美国材料与试验协会ASTM
- 发布日期:2008-12-01
When an engine oil is cooled, the rate and duration of cooling can affect its yield stress and viscosity. In this laboratory test, a fresh engine oil is slowly cooled through a temperature range where wax crystallization is known to occur, followed b
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