What is the throat size of a weld?

What is the throat size of a weld?

The throat of the weld is the distance from the center of the face to the root of the weld. Typically the depth of the throat should be at least as thick as the thickness of metal you are welding.

What is the significance of throat area in a weld design?

It is assumed for design purposes that fillet welds fail through the throat and it is therefore a simple matter to calculate the cross sectional area capable of carrying this applied load when the strength of the weld metal is known.

How deep should the throat of a fillet weld be?

The throat size is 0.7 times the weld size, which means to have an effective weld size of 0.9 times the material thickness, the fillet weld must be larger than the material thickness.

What is effective throat thickness of weld?

Explanation: Effective throat thickness is the shortest distance from the root of fillet weld to face of diagrammatic weld(line joining the toes). The effective throat thickness should not be less than 3mm and it should not exceed 0.7t or 1t, where t is thickness of thinner plate of elements being welded.

How is weld throat calculated?

Within the UK we commonly still use the leg size of the fillet weld on drawings. However, most European countries use the throat size. To calculate the leg size from a given throat size: Leg = √2 x Throat. To calculate the throat size from a given leg size: Throat = Leg / √2.

What is a 6mm fillet weld?

Fillet welds are defined by the size of the leg length e.g. a 6 mm CFW is a continuous fillet weld having a leg length of 6 mm.

How do you calculate effective throat thickness?

For CJP welds, the effective throat equals the thickness of the thinner part joined. For PJP welds, the effective throat equals the depth of the groove. There is a 1/8″ reduction of the depth for the SMAW process if a 45o bevel is used.

What is 6mm fillet weld?

What is Edge weld?

A weld applied in a preformed opening or groove between two metal parts. Groove welds defined in the Edge Weld PropertyManager can represent all edge-to-edge weld types (square butt, V, J, & U conditions).

How do you find the throat size of a fillet weld?

To do this we employ basic algebra. To get the throat size for an equal-leg fillet weld simply multiple the leg size (w) by the cosine of 45˚, which is 0.707. So a 0.330 leg would yield a 0.330 x 0.707 = 0.233” throat. This is why leg sizes are called out for fillet welds.

What is effective throat thickness in case of complete penetration butt weld?

The effective throat thickness in case of complete penetration butt weld is taken as the thickness of thinner part joined. The double V, double U, double J and double bevel butt welds are the examples of complete penetration butt weld.

What is the “size” of a leg fillet weld?

The “size” of an equal leg fillet weld is the length of the largest inscribed right isosceles triangle. Theoretical Throat = 0.7 x Size. For unequal leg fillet welds, the “size” of the weld is the leg length of the largest right triangle which can be inscribed within the fillet weld cross section. .

What is the difference between a butt weld and fillet weld?

Unlike a butt weld where the required weld throat is generally the thickness of the parent metal, the size of a fillet weld is determined by the loads that it is expected to carry. It can therefore be of any size that the designer specifies although there are practical limitations with respect to both minimum and maximum throat thickness.