ZINCALUME® zinc/aluminium alloy-coated steel

ZINCALUME® steel is a metallic coated sheet steel which has an alloy coating composed of 55 percentage aluminium, 43.5 percentage zinc and 1.5 percentage silicon. As a result of extensive technical research, ZINCALUME® steel is a superior coated steel, which can be used in a wide range of building and manufacturing applications that provides up to four times the life of zinc galvanised steel.


Launched in 1976 after many years of laboratory and exposure testing, ZINCALUME® steel by BlueScope Steel continues to set the standards for corrosion resistance and long life. It is proven to stand the test of time. Testing conducted at a number of trial sites around Asia confirm ZINCALUME® steel’s excellent performance in Asian climatic conditions. BlueScope Steel brings decades of experience to manufacturing ZINCALUME® steel and is the world’s largest supplier of 55 percentage Aluminium/zinc coated steel


ZINCALUME® steel protects the steel base in two ways. First, the aluminium component of the coating creates a tough physical barrier between atmospheric conditions and the inner steel core. Secondly, the cathodic protection that zinc provides protects the inner steel core where there might be scratches in the coating or cut edges. The zinc component sacrificially protects any bare steel exposed to the elements.