in inert or controlled atmosphere or vacuum

Full Title

Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working > in inert or controlled atmosphere or vacuum

Classification Context

Section:

CHEMISTRY; METALLURGY

Class:

METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

Subclass:

CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS