Metallurgical Terms

K

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K
Chemical symbol for Potassium

Kaldo Process (Swedish)
A method of producing steel from molten iron, using inclined rotating converter and a water-cooled oxygen lance inserted through the converter mouth.

Keyhole Notch
(See Charpy Test)

Killed Steel
Steel that has been completely deoxidized by the addition of manganese, silicon, and sometimes aluminum, before casting, so that there is practically no evolution of gas during solidification, and sound ingots are obtained. The shrinkage cavity or pipe is limited to the upper portion of the ingot or in the feeder-head with which such ingots are usually provided.

Knoop Hardness Test
A micro hardness test in which an elongated pyramid diamond is pressed into the surface.