International Annealed Copper Standard - a measure of electrical conductivity agreed in 1913 with “pure” Copper set as 100%. Advances in copper refining mean that now the pure Copper can attain 103% IACS. The minimum requirement for High Conductivity Copper now is 101% IACS.
Ingot Casting, Casting
The pouring of molten metal into a mould or die where it is allowed to solidify. When solidified, the resultant 'casting' takes on the shape and approximate dimensions of the mould. Examples • Ingot for forging or other hot working • Intermediate uses include extrusion billets, slabs for rolling, forging blanks. • End use: valve body.