This invention relates to copper-nickel alloys and in particular to alloys containing maganese, aluminium and iron and is a continuation-impart of application Ser. No. 627,642, filed Apr. 3, 1967, now abandoned, which in turn is a continuation-in-part of application Ser. No. 362,454 filed Apr. 24, 1964, now abandoned.
An object of this invention is to produce cupro-nickel alloys having a magnetic permeability below 1.1 and which are highly resistant to corrosion by sea water and possess a high strength combined with excellent ductility and resistance to shock as measured by the Izod or Charpy Impact Valuea combination of properties much sought after in modern marine engineering practice.
Another object of this invention is to produce alloys which are easily hot worked, e.g. by rolling, forging or extrusion and which do not require critical control of the hot working temperature. Such alloys are in consequence of this, readily forgeable in, for example marine forge shops or repair shops where the control of the forging conditions may be considered inadequate for the forging of many other alloys of this nature.