Weldability

Under weldability is the ability of a material to take an inseparable connection with another or the same material, which is manufactured by welding.

The weldability of a metal consists of its thermal conductivity, oxidation behavior with atmospheric oxygen and mixed crystal formation behavior (also see: austenite, martensite and pyrite ). The reaction of oxygen with metal during welding can be prevented by the generation of a protective atmosphere around the melt. These are noble gases called inert gases (usually argon or helium) or active gases. Active gases are inert gases which react with the weld ( to ). The active ingredients are usually mixed at low concentrations, for example, oxygen, nitrogen and carbon dioxide. For example, nitrogen dissolves in (highly) chromium-containing iron and nickel materials and suppresses or reduces the formation of ferrite.