Welding SG iron is not the same job as welding steel, and the difference sits in the carbon. In a spheroidal graphite casting, most of the carbon is held as graphite nodules rather than dissolved in the metal matrix, which is why the material machines cleanly and stretches before it breaks. An arc that melts […]
TIG weld troubleshooting comes down to one decision: is the problem the gas, the electrode, or the arc? Most faults that send an operator back to the settings panel trace to one of those three, and they are the cheapest to rule out first. Porosity, discoloration, arc wander, incomplete fusion, undercut, and crater cracks all […]
A groove weld is only as good as the shape cut into the joint faces before the arc starts. The groove type decides how much metal has to be deposited, how easily the arc reaches the root, how much the part will distort, and how much of the joint an inspector can actually confirm. That […]
A spot welder joins overlapping metal sheets by passing a high current between two copper alloy electrodes while they press the sheets together. The electrical resistance at the sheet-to-sheet contact point heats the metal enough to form a small molten nugget, and the electrode force keeps that nugget under pressure until it solidifies. No filler […]
The 7 basic types of welding most often referenced in fabrication training are MIG, TIG, stick, flux-cored, submerged arc, plasma arc, and oxy-fuel welding. They are not an official AWS ranking. They are the practical set most shops and technical programs teach first because they cover field repair, structural steel, pipe, sheet metal, and production […]
Arc welding automation is the application of controlled motion systems, power sources, and programming to move the welding torch, the workpiece, or both along a repeatable weld path. The goal is not simply higher speed; it is to reduce variation from part to part while making weld quality easier to inspect and predict. For industrial […]
Reading a welding rod starts with the full electrode classification printed on the coating or package, not with a shorthand sales name. A code such as E7018 H4R is a compact description of tensile strength class, position capability, coating behavior, polarity, and moisture resistance. The mark is only useful when each symbol is checked against […]
MIG welding advantages and disadvantages are not a single verdict. Metal inert gas welding, also called gas metal arc welding or GMAW, uses a continuously fed wire electrode and an external shielding gas to join metal. It is fast, comparatively easy to learn, and productive on clean steel and aluminum, but it is sensitive to […]
Argon is a nonmetal. More specifically, it is a noble gas, one of the group 18 elements that have a full outer electron shell and rarely form compounds. This classification explains why argon behaves as a gas at room temperature, does not conduct electricity like a metal, and works well as a shielding gas in […]
Welding machine types are easier to compare when the decision starts with the arc process, not the machine color or advertised output alone. Each type changes how operators control heat input, filler metal, shielding, and travel speed. Shop owners, maintenance teams, and fabrication buyers should first narrow the choice by material thickness, joint position, surface […]