Different Types of Welding Joints (Butt, Corner, Lap, Tee & Edge)

Want to know some basic welding joints types? The welding is not as easy as pie. It requires patience, attention, and the proper use of techniques to make perfect welds. The techniques of welding are limitless.

You can do a lot of creative and unique work if you know the right techniques and basics of welding.

In this article, to expand your welding learning, we bring a list of 5 different types of welding joints. Each type will enhance your experience and make you capable of doing more stunning welding work.

Top 5 Types of Welding Joints

Each type gives you some specific area of application and perfect welds.

5 Different Types of Welding Joints

In the welding industry, there are commonly 5 types of joints that are used by every welder. Let’s have a look at these joints.

  • Butt joint
  • Corner joint
  • Lap joint
  • Tee joint
  • Edge joint

1. Butt joint

This is the most simple welding joint type. In this type, two metal pieces are welded to join them by placing both of them in place.

It is mostly used in fabrication structures and piping systems. It is one of the effortless joint types, and you can make many variations through it.

These welds are made in various unique ways, while every weld is made for a specific purpose.

You can make these welds commonly for the width of the gap, groove, and layering. Besides this, you can also make them for other weld joints.

Butt welds have many types. To organize its types, there are mainly classified into three groups.

  • Single butt welded joints
  • Double butt welded joint
  • Closed or open butt welded joints

 Below mentioned are common types of butt joints groups. 

  • Single V
  • Double V
  • Single J
  • Double J
  • Square
  • Single bevel
  • Double bevel
  • Single U
  • Double U grooves

Few problems make the butt welding joints weaken, and they break in short periods. These problems mainly include cracking, excessive porosity, burn-through, incomplete penetration, and entrapment of slag.

These are not major problems; you can easily eliminate them using a small quality and modified welding material.

2. Tee Welding Joint

The tee welding is made by welding two metals at an angle of 90°. The T is formed by joining the edges of one metal into the center of another metal plate.

These joints are mostly considered the type of fillet welds. These joints are formed when you weld a pipe or tube on another base plate.

You can get perfect tee joints only if there is effective penetration built into the weld roof. The following are some welding styles that formed tee joints.

  • Plug weld
  • Fillet weld
  • J-groove weld
  • Slot weld
  • Melt-through weld
  • Bevel-groove weld
  • Flare-bevel-groove weld

One of the important things about these joints is that they can not be formed with grooves. To make them perfect, a thick and robust metal base can support and bear welding joints’ weight.

The weakness and summon defect of these joints is lamellar tearing. This thing occurred due to gaps and restrictions in the joints.

You can prevent this condition if you place a stopper during their welding. The use of stoppers will help you to prevent joint deformities and make them stronger.

You may also check the 10 Best TIG Welders for the Money reviews.

3. Lap joints

The lap joints are the revised and modified shape of the butt joints. In this technique, two metals are joined together by placing them in an overlapping position.

It is most commonly used to join two metals having different thicknesses. You can join them by welding both sides or only by single side welding.

They are mostly used on metal sheets because they can easily join in overlapping positions.

But for thicker materials, this technique is rarely used. The adjustment of thick material in an overlapping position is difficult, and you can not weld them smoothly and strongly.

Take a look at different styles used for lap joints

  • Spot weld
  • Plug weld
  • Slot weld
  • Bevel-groove weld
  • J-groove weld
  • Flare-bevel-groove weld

The major drawback of this type is the welding of joint corrosion and lamellar tearing. The overlapping welding of material causes these drawbacks.

However, you can also prevent them by using the right welding techniques and modifying welding material.

4. Corner joints

The corner joints are somehow similar to the tee joints. The main difference between them is only the welding of the base plate with other meals.

In T-joints, they are welded in the middle of the base plate. On the other side, both metals are welded to corners forming an L shape in corner joints.

These joints are the most commonly used in the sheet metal industry. They are mostly used in the formation of frames boxes and other similar products manufacturing. For the fitting up of outside corner joints, two methods are usually used.

  • V- groove
  • Square butt joint

Below mentioned are some common styles used for creating the corner joints.

  • J-groove
  • U-groove
  • Spot
  • Edge
  • Fillet corner-flange
  • Bevel-groove
  • Flare-V-groove

5. Edge joints

The edge joints are formed by placing the blithe metal surfaces together so that their edges become even. You can also make them by bending and welding both plates at a suitable angle.

These joints are considered groove-type welds. All the pieces are set side by side to their edges and then finally welded. These weld joints allow you to do big projects.

The weakness of most weld joints is caused by the heat input, penetration, and deposition rate. You can make perfect edger joints using the right amount of heat and modifying the other welding factors.

Take a look at edge joints applications

  • U-groove
  • J-groove
  • V-groove
  • Bevel-groove
  • Corner-flange
  • Edge-flange
  • Square-groove

The main reason for the edge joint’s weakness is the corrosion because of overlapping parts. Welders should also consider other factors: slack of fusion, porosity, and inclusion for these joint defects.


Summing up the article, we make sure that we have covered all the common types of welding joints.

These welding joints allow you to create some extra unique and sturdy metal joints for different purposes.

The best thing about all these types is that you can use them for your specific welding purposes.

In the last part of our articles, we are looking forward to your valuable suggestions.

If you find your article helping, let us know in the comment section. One more thing never forgets is to share the article with your welding team and colleagues.

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