Oxyacetylene welding of cast iron is relatively easy if attention is paid to some simple aspects of it. Not just the aspects specific to cast iron, but aspects in general about oxyacetylene welding as well. This article contains some hands-on advice on the subject. The commonly used variety of cast iron is the grey cast iron. If … Read more
Oxyfuel welding is a welding process in which metals are joined by heat of the flame emanating from the tip of an oxyfuel welding torch. The pressure may or may not be applied and filler rod may or may not be used. As the name suggests, any oxy-fuel welding process involves two gases. One is … Read more
This article starts with an overview of oxy-fuel cutting overview, and proceeds to explain in detail about the oxy-acetylene cutting process. Oxy-Fuel Cutting Overview When steel is exposed to high temperatures of the order of 1600°F (871°C), it gets oxidized very fast by the oxygen. Steel gets oxidized by oxygen at room temperatures too, but … Read more
This article introduces copper, brass and bronze and their properties pertinent to their weldability. In the latter stages of article, aspects related to welding of copper, brass and bronze have been discussed in some detail. Copper Copper has a reddish color, see the figure below. It has high electrical and thermal conductivity. Because of its’ … Read more
The term steel does not mean any one single composition. It is a vast variety of alloys that can all be called steel. If the metal has only carbon, and does not contain any other intentionally added alloy (except the impurities), then it is called plain carbon steel. Sometimes, elements such as vanadium, chromium, molybdenum, … Read more
The welding consumables in the welding process come in a variety of forms. For shielded metal arc welding, the filler comes in the form of a flux covered stick electrode. For flux-cored arc welding, it comes in the form of spooled wires that have flux at the core, and a metal sheath around it. In … Read more
Plasma arc cutting works on the same basic principles as the plasma arc welding. A column of hot ionized plasma issues from a constricting nozzle at a high velocity, and melts the base metal. It then removes molten metal to produce a kerf. In this article, we shall see in brief about the various components … Read more
The mechanical properties of a metal determine its’ suitability for an application. The properties help in predicting the behaviour of metals under certain conditions. The knowledge about properties of a metal also helps in specifying the requirements during procurement of raw materials for fabrication of equipment. From a welding point of view, quantifying the behaviour … Read more
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
Acetylene is a heavily used gas in oxy-acetylene welding. It is an organic substance, composed of only carbon and hydrogen at the molecular level. Its’ molecular construction consists of two carbon atoms bonded to each other through a triple bond. Each carbon atom in turn is bonded to one hydrogen atom through a single bond. … Read more