Ductile galvanised steel wire

摘要

A ductile, hard steel wire has a corrosion resistant coating comprising an internal layer of a first Zn-Al-Fe alloy contg. at least 15% Al and an external layer of a second Zn-Al-Fe alloy contg. at least 3% Al and 90% Zn. - Also claimed is prodn. of the wire by two successive hot dip coating steps with controlled cooling and/or heating to obtain a controlled diffusion heat treatment.