# Yield Strength

Written by Matt Milbury on . Posted in Pipe

Yield strength, abbreviated as $$\sigma$$ (Greek symbol sigma), also known as yield stress, is the minimum stress that leads to permanent deformation of the material.

### Yield Strength formula

$$\large{ \sigma = \frac{F}{A} }$$

Where:

$$\large{ \sigma }$$ (Greek symbol sigma) = yield strength

$$\large{ A }$$ = cross-section area

$$\large{ F }$$ = force

Solve for:

$$\large{ A = \frac{F}{\sigma} }$$

$$\large{ F = \sigma \; A }$$