Corrosion occurring preferentially at grain boundaries (also termed intercrystalline corrosion).

IC (Intercrystalline Corrosion) is a form of corrosion that can occur in most alloys at the appropriate conditions.

A product having the composition given above and a conductivity, when desensitised to intercrystalline corrosion, at least 0.5 MS/m higher than in state T6, is also disclosed.

Steel with characteristics similar to the previous one, in which niobium is the stabilizing element to improve resistance to intercrystalline corrosion.

The steel is so low in carbon that despite the heat treatment in welding it is practically insensitive to intercrystalline corrosion.

Resistant to intergranular corrosion up to 350 °C.

The key feature of type 321 stainless is its resistance to intergranular corrosion.

Although corrosion is principally possible on the basis of purely thermodynamic considerations, it can be assumed that local corrosion (pitting, stress corrosion cracking, intergranular corrosion) is highly improbable under the given boundary conditions.

Its low carbon content (C content) also provides immunity to intergranular corrosion, even after welding.

The aim of the invention is to design an AlMg aluminum alloy strip which is resistant to intergranular corrosion also at high strength and even when the alloy contains at least 4 wt.% of Mg.