METALLURGY OF IRON

Classification Context

Section:: CHEMISTRY; METALLURGY
Class:: METALLURGY OF IRON

Description

C21 encompasses the extraction, processing, and refining of iron from ores and scrap materials, including pig iron production, steel manufacture, and cast iron processing. This class covers blast furnace operations, steelmaking processes (such as open hearth, electric arc, and oxygen conversion methods), and heat treatment of iron-based materials. It also includes surface treatment, mechanical working, and quality control of iron and iron alloys, but excludes non-ferrous metallurgy and the detailed composition or properties of specific steel grades, which are covered by materials science classifications.

Related Keywords

metallurgical CHEMISTRY(the metal) or steelMETALLURGY of iron or steelPIG(S) iron

3 direct subcodes

Child Classifications

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C21B MANUFACTURE OF IRON OR STEEL
C21C PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
C21D MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING