Phase Diagram and Mechanical Properties of the Brasses Use of the annealed temper, and annealing or stress relieving after forming, reduces susceptibility to stress corrosion cracking. Alloys containing more than about 15% zinc are most susceptible. Stress corrosion cracking, particularly by ammonia and amines, is also a problem with the brasses. Resistance to dezincification is greatly reduced by the addition of a small amount of arsenic to the alloy. Alloys with more than about 15% of zinc may suffer dezincification, which leaves a weak, porous corrosion deposit of copper. Brasses are particularly susceptible to corrosion by solutions containing ammonia or amines. Please consult Austral Wright Metals for detailed advice on your application. Corrosion Resistance of Brassīrasses are resistant to corrosion in many media. Minor amounts of other alloying elements may also be added. There are many brasses, with properties tailored for specific applications by the level of addition of zinc. The dual phase alpha-beta brasses are usually hot worked. The single phase alpha brasses, containing up to about 37% zinc, are very ductile and easy to cold work, weld and braze. ![]() They are used for their strength, corrosion resistance, appearance and colour, and ease of working and joining. ![]() The addition of zinc to copper raises the strength and gives a range of properties, and the brasses are a very versatile range of materials. ![]() Sponsored by Austral Wright Metals - Ferrous, Non-Ferrous and High Performance Alloys Aug 30 2008īrasses are copper zinc alloys with a wide range of engineering uses.
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