AWS D1.1 Prequalified Welding Procedures

Prequalified WPSs for GMAW, MCAW, SMAW, FCAW & FCAW-S

Prequalified welding procedures must adhere to the strict requiremnts of the welding codes which permit their use.  AWS D1.1 Structural Welding Code (Steel) is one that allows their use.  Prequalified WPSs are exempt from testing becasue there is reasonable assurance that as long as all the requirements are met the deposited weld will be sound […]

Rainbow Colors in Stainless Steel Welding

Are they good or bad?

Different joints will have different levels of admixture (the mixing of weld metal with base metal) . The higher the admixture the more silicon islands will form on the surface of the weld.

We receive several calls about welding stainless and the beautiful rainbow colors, or lack thereof, on the weld and heat affected zone.  Is the tinting an indication of quality?  Are these colors acceptable? Do they show that the weld had enough heat to penetrate?  Why do they need to be cleaned?  The questions are endless. […]

How to Weld Titanium

Titanium is a metal which is silvery gray in color and has about half the density of steel (0.163 lb/in3).  Pure titanium is relatively soft has very low ultimate tensile strength.   For use in structural applications titanium is alloyed with chromium and iron, chromium and aluminum, manganese and aluminum and manganese alone.  These alloying elements […]

Which Welding Process Produces the Strongest Welds

SMAW, GTAW, GMAW, FCAW, MCAW or SAW?

This is a question that is often asked.   The short and quick answer is: they are all the same.  However, to understand why that is let’s take a quick look at the three elements that determine the strength of a weld: Weld length Weld size Weld (filler) metal strength Since we are trying to compare […]

Proper Storage of Welding Consumables

How to store stick electrodes, and mig, flux-cored and metal-cored wires

Proper storage of both opened and unopened packages of welding consumables is crucial. It should avoid quality issues such as porosity, excessive slag fluidity, rough weld surface, difficult slag removal and more importantly, elevated levels of diffusible hydrogen which can lead to cracking. Adequate storage, handling and re-conditioning of electrodes vary according to type.  The […]

Guidelines For A Proper TIG Setup

Tig welding can produce beautiful looking welds, and more importantly, x-ray quality deposits on some of the most critical welding applications. For the beginner it may be a very intimidating process. Selecting the right tungsten (type and size), cup size, and shielding gas and gas flow can be a daunting task. Below is a quick […]