New Publication provides Guidance on Nickel Aluminium Bronze for Engineers
Alloys of copper and aluminium are known as aluminium bronze. Their corrosion resistance and strength can be improved with the addition of nickel in combination with iron, producing nickel aluminium bronzes, which also offer excellent galling properties. End uses range from aircraft landing gear bearings to sea water pumps and valves, propellers and non-sparking tools. The alloys are manufactured both in wrought and cast forms.
The most commonly used alloys have around 5% nickel. Their microstructure is complex, which allows hardening but also requires strict control during manufacture, and heat treatment to obtain optimum properties for specific applications.
A newly-released publication offers practical guidance for engineers wishing to specify, design or produce nickel aluminium bronze components for marine, aerospace and other sectors. Their corrosion behaviour is explained and information given to obtain good service performance. Methods of manufacture, welding and fabrication are described and a list of references and useful publications is provided. Full details of designations, specifications and related composition and mechanical property requirements are included in an appendix.
A PDF version of CDA Publication 222 Guide to Nickel Aluminium Bronze for Engineers can be downloaded here.