How it Works

Experts from the welding industry answer your questions and explain 'how it works'.

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How it Works: Why Buttering on Dissimilar steels is often suggested?

Buttering is used to create a transition of composition and properties across the joint such that the resulting connection has properties suitable for the application.

How it Works: Underwater Welding – What is the first thing you need to know?

Underwater welds are commonly made by especially skilled diver-welders.  These people are divers first and welders second.

How It Works: How does porosity form in welds?

Porosity in welds results from only one thing – gas absorbed by the liquid metal in excess of what it can retain in solution when solidified. The classic example is nitrogen and oxygen from air absorbed by steel weld metal.  The steel weld pool easily absorbs large amounts of both gases which is rejected as the weld solidifies – forming bubbles.

The information provided is intended for general interest, to educate and inform our audience. The CWB and those providing feedback to the questions do not take any responsibility for any omissions or misstatements that could lead to incorrect applications or possible solutions that industry may be facing.

How-It Works content is submitted by Industry experts to the CWB Association and does not necessarily reflect the views of the CWB Group. When testing for CWB Certification or CWB Education, please refer to CWB Education textbooks or CSA standards as the official source of information.