Aluminothermic welding consumables\nmaterials consumed in the performance of a weld, shall consist of: \n\na. welding powder – a prepared package containing the correct quantity of aluminothermic powder for the type of weld to be made. \nb. moulds – preformed refractory receptacles that are placed around the rail at the gap to be welded and which receive the molten metal form the crucible. \nc. single-use crucible – pail-shaped refractory for containing the weld powder during ignition, reaction and pour.\nd. igniter – match like device,......