Kaldo Process
A process of steel making where the impurities are oxidised by blowing high purity oxygen through an inclined lance (or lances) on the surface of high phosphorous molten pig iron held in a basic lined converter which is inclined at about 20o to the horizontal and is rotated at rates up to 35 revolutions/minute.

Key
A wedge used for fastening the dies into the hammer tup of into the anvil block.

Killed Steel (Solid Steel)
Steel which has been fully deoxidized to reduce the oxygen content of the steel to a minimum in order that it lies perfectly quiet when poured into an ingot mould and no reaction takes place between carbon and oxygen during solidification. There is no evolution of gas in the mould and the to surface of the ingot solidifies with relative rapidity. Killed steel generally is used when a homogeneous structure is required in the finished steel. In general, all steels with more than 0.30% carbon content are killed.

Kisser
Patches of scale left on sheets after pickling. This results from two sheets having remained in close contact during pickling.

K-Plate
Tin plate with superior corrosion resistance to mild acid food products; must meet four (4) special property tests : 1. Pickle lags 10 or less. 2. Tin crystal size ASTM 9 or larger. 3. ISV (iron solution value) 20 micro grams Fe or less. 4. ATC (Alloy tin couple - American Can test) or AMP (Aerated Media Polarization test) Avg. 0.050 micro amps/sq. cm. Or less – 95% 0.085 or less. No test over 0.120.

Knoop Hardness Test
An indentation hardness test using calibrated machines to force a rhombic-based pyramidal diamond indentor having specified edge angles, under specified conditions, into the surface of the material under test and to measure the long diagonal after removal of the load.