PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL

**Definition:** This place covers:

all treatments of molten iron or steel, including the apparatuses specifically related thereto, e.g. converter, electric furnace.

**Limiting references (this place does not cover):** - Cast iron alloys -> C22C37/00 - Ferrous alloy compositions -> C22C38/00