DZR Brass

Severe corrosion of brass, also known as dezincification, can occur in environments containing chlorides and other deviating water qualities such as soft water. Stagnant or slow moving water can also corrode copper to a sponge-like surface with very poor mechanical properties. This can be virtually eliminated with Dezincification Resistant Alloys (DZR or DR brass).

Also known as CR (corrosion resistant) brasses, DZR Brass is subject to careful control of time and temperature of heat treatment in production. Detailed attention is given to the type and quantity of alloying elements to control alpha and beta phases due to the vulnerability of beta phase to dezincification. In addition, attention must be given to the finished part’s manufacturing process (machining or hot forging) so that the correct heat treatment can be applied to the material.

    Typical Applications:
  • Plumbing Fittings
  • Valves
  • Propellers
  • Bearings
  • Shafts


Chemical Composition
Cu Pb Zn As
Min (%) 59.5 1.5   0.02
Max (%) 64.0 3.5 Rem 0.25
Mechanical Properties
Temper Code Tensile Strength
YS-0.5% Ext
Rockwell B scale Section Size
H02 50 Typ 35 Typ 20 Typ 40 Min
75 Max
1/2 - 1
H02 45 Typ 30 Typ 30 Typ 40 Min
65 Max
1 - 2
H02 55 Typ 40 Typ 10 Typ 65 Min
85 Max
H02 40 Typ 25 Typ 35 Typ 30 Min
55 Max