2B227Vacuum or other controlled atmosphere metallurgical melting and casting furnaces and related equipment as follows:

a. Arc remelt furnaces, arc melt furnaces and arc melt and casting furnaces having both of the following characteristics:
1. Consumable electrode capacities between 1 000 cm3 and 20 000 cm3; and
2. Capable of operating with melting temperatures above 1 973 K (1 700 °C);
b. Electron beam melting furnaces, plasma atomisation furnaces and plasma melting furnaces, having both of the following characteristics:
1. A power of 50 kW or greater; and
2. Capable of operating with melting temperatures above 1 473 K (1 200 °C);
c. Computer control and monitoring systems specially configured for any of the furnaces specified in 2B227.a. or 2B227.b.;
d. Plasma torches specially designed for furnaces specified in 2B227.b. having both of the following characteristics:
1. Operating at a power greater than 50 kW; and
2. Capable of operating above 1 473 K (1 200 °C);
e. Electron beam guns specially designed for the furnaces specified in 2B227.b. operating at a power greater than 50 kW.