Welding Glossary E
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| Term | Definition |
|---|---|
| Eddy current inspection | An inspection process where changes in the flow of an induced eddy current, visible on an oscilloscope, indicate the location of a crack or other weld defect. |
| Edge joint | A welded joint connecting the edges of two or more parallel or nearly parallel parts. |
| Edge preparation | The shaping of the edges of the joint prior to welding. |
| Edge weld | A weld produced on an edge joint. |
| Effective throat | The minimum distance, minus any convexity, from the weld face to the root of the weld. |
| Elbow | One of several axes on a typical robot. |
| Electric motor-driven carriage | A type of automatic cutting machine. |
| Electrode | A substance which brings electricity up to the point where the arc is to be formed.In many electric arc welding processes the electrode is melted and becomes part of the weld. |
| Electrode covering | Flux materials combined into a thick clay-like mixture and then applied to the electrode wire in a very exact thickness. |
| Electrode drying oven | Equipment in which to keep SMAW electrodes under ideal conditions to avoid moisture absorption or other possible contamination. |
| Electrode extension | The distance that the electrode extends beyond the MIG contact tip (GMAW) or TIG (GTAW) gas cup. |
| Electrode holder | A hand held device in which an electrode is held for SMAW welding. |
| Electrode identification system | A system of identification numbers for all welding electrodes developed by the American Welding Society. |
| Electrode lead | The electrical conductor between the welding machine and the electrode holder or torch.Also called the welding cable. |
| Electrode Taper | The angle ground on a tungsten electrode for specific weld applications.This angle is typically measured as an included angle.Proper shape of the electrode is especially important in TIG (GTAW) welding. |
| Electrode tip diameter | The dimension that determines the size of the spot weld in resistance spot welding. |
| Electrogas welding | (EGW) A welding process that uses one or more torches (GMA or FCA) with a shielding gas and a set of water-cooled shoes that move up the joint to contain the molten weld metal as the weld progresses. |
| Electron | A fundamental part of an atom.It carries a small negative electrical charge. |
| Electron beam cutting | A cutting process in which a focused stream of electrons is used to cut metals. |
| Electronic pattern tracer | An electronic eye device used to follow a pattern of a part to be cut.The electronic eye usually follows a black-on-white pattern and may be used to direct one or more cutting torches. |
| Electroslag welding | (ESW) A welding process in which one or more arcs are established between continuously fed metal electrodes and the base metal.As the weld progresses vertically, moving water-cooled shoes contain the molten metal, flux and slag. |
| Element | A chemical substance that cannot be broken down into simpler substances by chemical action. |
| Elongation | The percentage increase in a specimens length when that specimen is stressed to its yield strength.The total amount of stretching of a metal specimen, produced in a tensile test. |
| Erosion | Reducing the size of, or wearing away of, an object due to liquid or gas impact. |
| Expansion | Increase in one or more of the dimensions of a body, caused usually by a rise in temperature. |
| Explosion welding | (EXW) A solid state welding process wherein coalescence is effected by a high velocity movement produced by a controlled detonation. |