Shielded Metal Arc Welding Electrode Classification System

The classification system for SMAW electrodes is identical between AWS (American Welding Society) and ASME BPVC. In this article, we shall take reference from ASME BPVC Section II Part C for studying various electrode classification. The SMAW electrodes are classified under the following specifications in ASME Section II Part C. SFA 5.1: specification for carbon … Read more

Welding Arcs

Welding arcs is a source of intense heat that is used to melt the base metal and filler metal to produce a weldment. Arc is where the real action happens, in the course of all arc welding processes. In this article, we shall discuss in brief about the function of welding arcs, and different kind of forces … Read more

Welding Electrical Circuit

In order to understand about the polarity in an arc welding circuit, it is first important to understand the construction of the arc welding circuit. This article discusses a few terms used in any electrical circuit such as EMF, current, and resistance. The later part of the article equates the welding electrical circuit to ordinary … Read more

How to TIG Weld Stainless Steel Effectively: Preventing Carbide Precipitation

In order to effectively weld stainless steel with tungsten inert gas welding process, it is important to consider carbide precipitation. TIG Weld Stainless Steel : Carbide Precipitation What is Carbide Precipitation? Carbide precipitation is said to occur when the chromium and carbon in 300 series stainless steels are drawn out of the microstructure and react with atmospheric … Read more

Arc Welding With Constant Voltage

In welding – besides the current current power source, the second type of power source is the constant voltage (CV) machine or the constant potential (CP) machine. It has a relatively flat volt-ampere characteristic curve. In this article we shall discuss about arc welding with constant voltage. Features Of A Constant Voltage Machine The figure below shows … Read more

Arc Welding With Constant Current

The power source is the most important part of the arc welding equipment. In all arc welding processes, two kinds of power sources are generally used, from a voltage-ampere output characteristics point of view.    One is constant current type, the second is constant voltage type. This article details the constant current type power sources in … Read more