Knowledge
Home > Knowledge > Content
DZR or DR brass composition knowledge for Australia and South Africa faucet market
- Sep 17, 2018 -

DZR is the abbreviation of English Dezincification Resistant, also known as DR copper, adding As (arsenic) in brass, and the valve inhibits the loss of zinc in brass.

DR copper, which is dezinc-resistant brass, is a copper alloy with a zinc content of more than 37% which is sensitive to dezincification or dezincification in a corrosive environment. It is controlled by suitable chemical composition control and suitable process technology to make it Very high resistance to dezincification, able to meet the standard 'AS2345' by anti-dezincification test. For single-phase brass 'usually adding a very small amount of arsenic to suppress a-phase corrosion to make it highly resistant to dezincification, for two-phase brass, in addition to adding a small amount of arsenic, it is necessary to carefully control the chemical composition and The process to obtain dezincification resistance.

 After years of large-scale production and process research and development, the company has developed mature DR copper production technology to ensure that it has very high resistance to dezincification and good cutting performance.

DR brass ingots, tubes and rods are used in the production of melt-casting extrusion and drawing technology. The tube bar metal has high density, uniform and fine metal structure, excellent mechanical properties and various process properties, fine surface quality, polishing and plating performance. excellent.

 It is suitable for forging, stamping, rolling, car processing, welding and other forming processes. It has good polishing and electroplating effects. It is widely used in high-grade plumbing, sanitary ware, valves, ship fittings and other products with high corrosion resistance requirements. Components of products in the electrical, construction, automotive, instrumentation, machinery and other industries.


Alloy Grade

Chemical composition control range%

Cu

Pb

Fe

Sn

Al

Ni

As

Zn

others

product shape

W534

61.0-63.0


  1.7-2.2

≤0.10

≤0.30

≤0.05

≤0.20

0.02-0.10

margin

Mn≤0.10,Other elements alone≤0.020
Sum of other elements≤0.200

tube、bar

DR brass bar

61.8-63.0


  1.7-2.8

≤0.20

≤0.20

≤0.05

-

0.02-0.15

margin
   

Sum of other elements≤0.2

tube、bar

CuZn39Pb2As(CW602N)

61.0-63.0

1.7-2.8

≤0.1

≤0.1

≤0.05


 
≤0.3

0.02-0.15

margin

Mn≤0.1,Sum of other elements≤0.2

tube、bar、ingot

DR brass ingot

61.8-63.0

0.8-1.2

≤0.20

≤0.20

0.50-0.80

≤0.30

0.02-0.15

margin

Sum of other elements≤0.2

ingot