Copper Alloys 70-30 Arsinical Brass C26130 – Austral Wright Metals
Product Data Sheet – Copper Alloys
70/30 Arsinical Brass Alloy 259 UNS-C26130
Equivalent Alloy Specifications
Australian Product Specifications
AS1572, Seamless Tubes for Engineering Purposes
Available Forms Austral Wright Metals can supply this alloy as tubes & fittings.
General Description 70/30 arsenical brass is used for heat exchangers, plumbing tube and fittings, drain & vent pipes and other applications requiring excellent corrosion resistance in waters.
The alloy is the most common brass, 70/30 brass (C26000), with the addition of a trace quantity of arsenic as a corrosion inhibitor. Mechanical properties are unaffected by the arsenic addition, but corrosion resistance is greatly improved. The alloy is sometimes referred to as ‘DR’ or dezincification resistant brass.
The alloy consists of the face centred cubic alpha phase, and has the optimum combination of strength and ductility in the copper-zinc series.
C26130 has the distinctive clear bright yellow colour normally associated with ‘brass’.
Phase Diagram & Mechanical Properties
C26130 has good corrosion resistance to weathering and very good resistance to many chemicals. It is suitable for use with most waters, and can be used underground because it resists soil corrosion. It can be used for all potable waters, many industrial and mine waters, seawater and brackish water. The minor arsenic addition acts as a very capable corrosion inhibitor, giving substantially better corrosion performance in waters than uninhibited 70/30 brass.
C26130 should not be used in contact with ammonia or ammonia compounds, as it may suffer stress corrosion cracking. Beware of corrosion inhibitors in piping systems containing carbon steels, which should be checked for compatibility with C26130.
Please consult Austral Wright Metals for advice on your specific application.