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The ultimate strength of the grease is guide the sample to flow shear stress, also known as the ultimate strength of shearing stress or limit stress, ultimate strength for short.The ultimate strength of the grease with letter tau said, the unit for Pa.Standard method for determination of ultimate strength grease is SH/T 0323-0323, under the test temperature measuring displacement occurs in the plastic screw thread tube of grease maximum pressure, and with the strength limit.The ultimate strength of the grease depends largely on the types of thickener and the dosage of grease, soap content increased, the ultimate strength is also increased.Grease ultimate strength is related to temperature.The higher the temperature, the greater the ultimate strength of fat little;Temperature drop, the ultimate strength of fat increase.Depending on the high temperature when ultimate strength can be roughly show the applicable temperature limit of the grease.In actual use of the grease, the grease of ultimate strength scope about between 100-300 pa.In general, the liquidity of the grease is often based on the strength of the high temperature limit to expect it flows easily, but with similar viscosity under low temperature values to estimate whether it can normal flow.