The Reason Behind Minimum Fillet Weld Sizes

It's not what you think

Have you ever noticed that there are design rules that prohibit sizing a fillet weld below a certain size for a given thickness of material? If you look at AWS D1.1/D1.1M:2015 Structural Welding Code (Steel) you can find this on Table 5.7.   If you happen to own a copy of AISC 360-16 Specification for Structural […]

The Importance of Accurate Documents to Support Welder Qualifications

When it comes to precision welding and fabrication, it only takes one wrong document to cause a major problem.  Still, many companies operate by the motto: “if it ain’t broke, don’t fix it”.  Assuming you have incredible attention to detail and a lot of luck, that approach might work for a while.  That’s why companies […]

How to Avoid Sensitization When Welding Austenitic Stainless Steels

Stainless steels are iron based alloys that contain a minimum of 10.5% chromium.  This chromium reacts with the air and forms a very thin but very tenacious chromium oxide layer which is what prevents stainless from rusting. There are 5 types of stainless steels which are categorized depending on additional alloying elements.  One thing they […]

How to Control Welding Fumes

Engineering and work practice controls

We all know welding fumes are bad for your health.  Companies that do a lot of welding are paying special attention to this matter and trying to create better working environments not just for welders but for everyone in the shop.  Has your company taken any steps to reduce or control fume generation?  In this […]

Who Is Required To Know Welding Symbols?

This is not limited only to welders and inspectors

Knowledge of welding symbols is not a requirement limited to welders. Many other professionals must have the ability to interpret and write welding symbols.  From estimators to designers to quality personnel, this universal language must be understood. In our last post we touched briefly on the importance of being able to interpret welding symbols.  If […]

Common Mistakes That Lead to Hydrogen Induced Cracking

Even when a qualified welding procedure is in place

Hydrogen Induced Cracking (HIC), also called hydrogen assisted cracking (HAC) and cold cracking, is a common welding defect when welding heavy steel sections and steels with high carbon content.  If you would like to learn more about the causes of HIC read Factors Influencing Hydrogen Induced Cracking. In the above mentioned article we explained that […]

How to Determine the Shear Strength of a Fillet Weld

In our previous post we explained how to determine the strength of a transverse fillet weld.  A transverse fillet weld is one that is perpendicular to an applied load.  We will now look at how to determine the strength of a fillet weld under shear stress. If the load applied is not perfectly perpendicular to […]

How to Determine the Strength of a Transverse Fillet Weld

Unless you are a design engineer you typically don’t have to worry about determining the strength of a weld.  The strength of a weld refers to its load carrying capacity, or how much load it can handle before it fails.   However, it is very important for all of us involved in the welding process, from […]

How Hard is the CWI Exam?

Why passing rate is so low and what to do about it

Are you planning on becoming a certified welding inspector (CWI) in the near future?  Or do you need one of your employees to get this certification?  If so, you have probably heard that the exam is pretty tough.  Although the American Welding Society (AWS) does not publish information on passing rates, it is estimated that […]

What is Stress Relieving and Why We Need It

Stress relieving is a form of post weld heat treatment. In stress relieving we heat a material to a specific temperature; hold it at this temperature for a specified amount of time in order to reduce or eliminate residual stresses; and then cool it at a slow enough rate to prevent these stresses from redeveloping. […]