Weld - Defects

We talk about type of welds & weld joints, the talk on welding will be incomplete if we don't talk about weld defect!




Some weld defects are visible, some are visible with aide & some are invisible and need extra process to reveal them.

Before we go into process of different methods to see those defect, one must first know what are those defects?

Let me show you some defects & with their names

• Spatter

• Incomplete Fusion

• Incomplete Penetration

•  Overlap

• Porosity 

• Undercut 

• Underfill 

Some are Visiable in Radiography!

Burn Thru

Cluster Porosity 

Excessive Reinforcement 

External Undercut 

Internal Undercut 

lack of penetration 

lack of fusion 

 Porosity

Suck Back 

Tungsten Inclusion 

in my next post, will discuss, i ndetail about the Methodology to see these cracks!