# Plug and Slot Welds

on . Posted in Welding Engineering

## Axial Force on Perpendicular Plug Weld formulas

 $$\large{ \tau_b = \frac{ P }{ 0.5 \; d^2 \; n } }$$ $$\large{ \tau_p = \frac{ P }{ 2.2 \; d \; t \; n } }$$

### Where:

$$\large{ \tau_b }$$ (Greak symbol tau) = shear stress in weld base area

$$\large{ \tau_p }$$ (Greak symbol tau) = shear stress in weld peripheral area

$$\large{ d }$$ = diameter of plug weld

$$\large{ n }$$ = number of welds

$$\large{ t }$$ = plate thickness

$$\large{ P }$$ = total axial force

## Axial Force on Bevel Plug Weld formulas

 $$\large{ \tau_b = \frac{ P }{ 0.8 \; d^2 \; n } }$$ $$\large{ \tau_p = \frac{ P }{ 3.1 \; d \; t \; n } }$$

### Where:

$$\large{ \tau_b }$$ (Greak symbol tau) = shear stress in weld base area

$$\large{ \tau_p }$$ (Greak symbol tau) = shear stress in weld peripheral area

$$\large{ d }$$ = diameter of plug weld

$$\large{ n }$$ = number of welds

$$\large{ t }$$ = plate thickness

$$\large{ P }$$ = total axial force

## Axial Force on Perpendicular Slot Weld formulas

 $$\large{ \tau_b = \frac{ P }{ 0.7 \; w \; L \; n } }$$ $$\large{ \tau_p = \frac{ P }{ 1.4 \; t \; L \; n } }$$

### Where:

$$\large{ \tau_b }$$ (Greak symbol tau) = shear stress in weld base area

$$\large{ \tau_p }$$ (Greak symbol tau) = shear stress in weld peripheral area

$$\large{ L }$$ = length of welds

$$\large{ n }$$ = number of welds

$$\large{ t }$$ = plate thickness

$$\large{ P }$$ = total axial force

$$\large{ w }$$ = width of weld

## Axial Force on Bevel Slot Weld formulas

 $$\large{ \tau_b = \frac{ P }{ w \; L \; n } }$$ $$\large{ \tau_p = \frac{ P }{ 2 \; t \; L \; n } }$$

### Where:

$$\large{ \tau_b }$$ (Greak symbol tau) = shear stress in weld base area

$$\large{ \tau_p }$$ (Greak symbol tau) = shear stress in weld peripheral area

$$\large{ L }$$ = length of welds

$$\large{ n }$$ = number of welds

$$\large{ t }$$ = plate thickness

$$\large{ P }$$ = total axial force

$$\large{ w }$$ = width of weld