C
CHEMISTRY; METALLURGY
C
CHEMISTRY; METALLURGY
C21
METALLURGY OF IRON
C21
METALLURGY OF IRON
C21C
PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
C21C
PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
5/00
Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel; or stainless steel
5/00
Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel; or stainless steel