| Code | API_Yield_Stress |
| Name | API Yield Stress |
| Parents | Property > Stress > Shear_Stress > Yield_Stress |
| Description | Resistance to initial flow; the stress required to start fluid movement. When using the direct-indicating viscometer, it is found by subtracting plastic viscosity (API_Plastic_Viscosity) from the 300-rpm reading of a Fann35 rheometer. |
