Welding Joints: Different Types, and Their Applications

Welding joints are very frequently used for long lasting welding. Nowadays there has been great progress in welding technology; it has secured a major place within modern machine components. There are several advantages of welding joints like higher efficiency, lightweight, smooth appearance, not expensive, flexibility for alteration as well as addition, and Join process is possible in difficult locations through welding. Due to these benefits, the welding process is suitable for combining the components in modern machines. There are different types of welded machine components such as steel structures, pressure vessels, axles, Heavy hydraulic turbine shafts, flanges welded to shafts, crankshafts, pulleys, large gears, flywheels, machine frames, gear housing, mill-stands, and bases.

What are Welding Joints?

The welding joints are edges otherwise points where different metal or plastic pieces are connected together. These can be formed by connecting various metals otherwise plastic pieces based on an exact geometry. There are different types of joints are available in the market but as per Welding Society in America has classified some of them like butt, edge, corner, tee, and lap. These joints may have different designs at the joint wherever actual welding can take place.

Welding Joints
Welding Joints

Before the welding procedure is happening then the preparation of joints is required. There are different types of joint techniques are available which include routing, stamping, shearing, casting, forging machining, filing, plasma arc cutting, oxyacetylene cutting, and grinding.

Different Types of Welding Joints

The welding joints are classified into five types for welding two parts as one. The welding joints are butt, corner, lap, tee, & edge joint.

1) Butt Joint

The butt joint can be formed by arranging the two metal ends together are named as a butt joint. In this kind of joint, the two ends lie on top of the similar plane otherwise side by side. This joint is very useful in combining the metal or plastic parts jointly. Butt Joint includes different types of welding namely Square Butt, Bevel groove, V-groove weld, J-groove, U-groove, Flare-V-groove, Flare-bevel-groove butt welding.

Butt Joint
Butt Joint

The applications of Butt joint include Pipes Valves, Flanges, and Fittings


2) Corner Joint

The corner joint can be formed by arranging the corner of two metal ends at the right angle is named as a corner joint. The L shape can be formed by welding two parts with a corner joint. Corner joint includes different types of welding namely Fillet, Spot, Square-groove, V-groove, Bevel-groove, U-groove, J-groove, Flare-V-groove, and Edge Corner-flange.

Corner Joint
Corner Joint

The applications of Corner Joint include sheet metal, light sheets, heavier metal sheets, and this jointing is also used in the designing of boxes, frames & another same kind of fabrication.

3) T-Joint

The T-joint can be arranged by interconnecting two ends at 90-degree angle as well as one element lies in the middle of the other. The two ends are welded like a letter T, so it is named as T-joint. T-joint includes different types of welding namely Fillet, Plug, Slot, Bevel-groove, J-groove, Flare-bevel groove, and Melt-through weld.


The applications of T-joint mainly include when a metal part is connected to some type of base, attaching thin plates, structural and machine applications

4) Lap Joint

The lap joint can be formed whenever the two metal or plastic ends are placed one above another and then joined through the welding process. This type of joint may one-sided otherwise dual sided. Lap joints are frequently used to weld two metal pieces with dissimilar width. Lap joint includes different types of welding namely Fillet, Bevel-groove, J-groove, Plug, Slot, Spot, Flare-bevel-groove

Lap Joint
Lap Joint

The applications of lap joint mainly include gas tungsten arc weld, resistance spot welding, as well as gas metal arc welding. These are also used in plastic, wood, tabling, temporary framing, assembly of the frame in cabinet making and in automation relating processes.

5) Edge Joint

The edge joint can be formed by connecting the two edges of metal parts jointly are known as edge joint. Edge joint is mainly used wherever the two sheet edges are nearby & that is estimated parallel planes by the welding end. In this kind of joint, the join does not enter completely due to the width of joint, thus it cannot be utilized within the applications like stress as well as pressure. Edge joint includes different types of welding namely Square-groove, Bevel-groove, V-groove, J-groove, U-groove, Edge-flange, and Corner-flange weld.

Edge Joint
Edge Joint

The applications of edge joint mainly include where sheets edges are nearby and that are roughly parallel planes on the welding end. These joints are applicable where the join is essential to weld two nearby pieces jointly, and where the thickness of sheets is less than 3mm.

Benefits of Welding Over Riveting

The benefits of welding over riveting mainly include the following.

  • The welding process is mainly used to weld the metal edges without having to overlap.
  • Welding method saves burden during the assembly process.
  • Welded joints are superior several times due to the material lying on both sides of the join which is physically joined.
  • Welding process can simply join sections of pipe otherwise metal column.
  • Welding method is a quicker way of connecting metal.
  • By using the welding process, changes can be made.

Thus, this is all about different types of welding joints. From the above information finally, we can conclude that why these joints are necessary for various applications. Some of them are used in lightweight as well as heavy metals. Some types of welding joints can generate strong welds, therefore, they are difficult whereas others are inexpensive and generate soft welds. Each welding joint has its own advantages, disadvantages, and applications. Here is a question for you, what are the disadvantages of welding joints?