Post weld heat treatment is normally unnecessary.
Copper nickel properties and applications are provided in this technical publication. Composition and properties of the 90/10 and 70/30 copper-nickel alloys are given, together with examples of their applications. 1982. 40pp. Archive for reseach purposes.
Copper nickel technical data for 90/10 and 70/30 alloys including compositions, physical, mechanical and fabrication properties for these two most commonly encountered copper-nickel alloys. 1982. 32pp. Archive for reseach purposes.
The cost savings available when copper-nickel cladding is used to prevent corrosion and marine organism attachment are significant. This publication details how they can be achieved. 1986. 16pp. Archive for research purposes.
Gives reasons for choice of 90/10 copper-nickel alloy in preference to other materials for many applications. 1986. 16pp. Archive for research purposes.
Suitability of the many methods now available for the jointing of copper and copper alloys with details of filler materials and recommendations for good joining practice. 1994. 64pp.
This large table gives information on the suitability of copper and copper alloys with many different chemicals. Data is given for copper, brass, copper-nickel, aluminium bronze and gunmetals at three temperatures and shows if specific materials can be used with chemicals giving an indication of corrosion resistance. 5pp.
They do not experience chloride or sulphide stress corrosion. They have a high resistance to ammonia stress corrosion compared to other copper alloys and do not require a stress relief anneal for seawater service.
They are available but 70-30 copper-nickel consumables are preferred for welding both the 90-10 and 70-30 alloys due to superior deposition characteristics.
Copper-nickel alloys can harbour slimes, but the attachment of macro-organisms—such as marine grasses and shellfish—is impaired. If these do become attached under quiet conditions, adherence is poor and they can be easily removed mechanically.
This publication provides an understanding of the two primary copper-nickel alloys to allow good fabrication and operational practices to optimise in-service performance. Topics covered include general engineering properties of 90/10 and 70/30 copper-nickels, welding and fabrication practices and a basic overview of corrosion and performance in seawater immersion trials. 2018. 32pp.
The aim of this publication is to provide engineers with an appreciation of copper alloys commonly used in marine applications. It will provide an overview of the range of alloys and their properties, and give references and sources for further information. 2018. 32pp.