| 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. |
