Posted by Robert Hernandez on Feb 14th 2025
| Term | Definition |
|---|---|
| Kerf | The space from which metal has been removed by a cutting process. |
| Keyhole | The term applied to the enlarged root opening which is carried along ahead of the puddle when making an arc weld or other type of welded joint. |
| Keyhole welding | A welding technique in which concentrated heat penetrates the workpiece, leaving a hole at the edge of the weld. As the heat source moves on, the keyhole is continually formed and filled. |
| Kilopascal | (kPa) One thousand pascals. A pascal is the metric unit of pressure. |
| Kinetic energy | The energy of a moving object. |
| Knee | The lower arm supporting structure in a resistance welding machine. |
| KVA | Kilovolt-amperes is the measurement of the total volts times the amps, divided by 1,000. |
| KW | Kilowatts. Primary kilowatts is the power used by the power source whereas secondary kilowatts is the actual output of the welding power source. |
