Common Tests for Welder Performance Qualification

The purpose of welder performance qualifications is to ensure that the welder can deposit sound welds.  There are several tests, both destructive and nondestructive, that are used to evaluate a welder’s ability to deposit good welds.  Below are four of the most common test applied for these qualifications:   Visual Inspection (VT) Visual inspection is […]

Fillet Weld Leg Sizes Are Meaningless!

Measuring fillet weld legs is meaningless, well… not really.  Fillet weld leg sizes are very important, but simply measuring the leg of a fillet weld does not tell us if we actually achieved the desired throat dimension.  The strength of a fillet weld is determined by its effective throat.  As you can see in the […]

How To Qualify Welders

One of the most common requests for help that we get pertains to the qualification of welders. Our customers win a contract and later find out they need to qualify their welders.  Often, they realize this right before production is to begin and scramble to get their qualifications done.  Even worse, they may also need […]

Etching Solutions for Steel, Stainless, Aluminum and Other Metals

For high-quality macro-etches

The qualification of welders and welding procedures often involves macro-examination of welds.  Performing macro-etches is a relatively simple procedure, but strict guidelines must be followed to ensure safety.  Most chemicals used in etching solutions are hazardous and must be handled accordingly.  Any person etching with these chemicals must be familiarize him or herself with the […]

Bigger (Weld) Is Not Always Better

When it comes to fillet welds, bigger is not always better.  A fillet weld is easy to measure, simply take out your fillet weld gauges measure it.  However, there is an incorrect assumption that a bigger weld (as measured with a fillet gauge) is always stronger than a smaller weld. Before we get into this […]

5 Types of Tests for Welder Performance Qualification

Codes detail the requirements for performance qualifications of welders, welding operators and tack welders. Many codes do not demand that a Certified Welding Inspector (CWI) or a welding engineer conduct the necessary testing.  Unless your customer specifically asks that a CWI or third-party do this, you can simply follow the code yourself to perform all […]

Benefits of Using Prequalified Welding Procedures

Prequalified welding procedures are a great tool available to those who need qualified procedures in conformance with  AWS D1.1 Structural Welding Code – Steel.  However, there are strict requirements for the use of a prequalified welding procedures.  It is not as easy as picking a qualified joint and using filler metal manufacturer’s recommended procedures. There […]

Preventing Hydrogen Induced Cracking

Our last post (Factors Influencing Hydrogen Induced Cracking) went over the factors that contribute to hydrogen-induced cracking.  We will now go over how to prevent HIC from happening.  If you recall, we mentioned you need all three factors to be present in order to have HIC:  These factors are 1. a susceptible microstructure, 2. threshold […]

7 Ways You Are Violating Welding Procedures And Don’t Know It

Good intentions are not enough - Check Everything!

Some welding shops can weld however they want and don’t have to comply to any  standard or code.  On the other hand, some manufacturers have to meet and follow stringent requirements  and follow specific codes such as AWS D1.1, API 1104 or  ASME Section IX.  The development of welding procedures is not an art, at […]