by expanding tubular bodies

Full Title

Modifying the physical properties of iron or steel by deformation > by cold working > of the whole cross-section, e.g. of concrete reinforcing bars > by expanding tubular bodies

Classification Context

Section:

CHEMISTRY; METALLURGY

Class:

METALLURGY OF IRON

Subclass:

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