Low Leaded Brass

DZR Brass (Dezincification Resistant Brass) with low lead content is specially designed to combine the benefits of dezincification resistance with the ease of machining provided by the presence of a small amount of lead. This alloy is particularly useful in applications where both mechanical performance and machinability are important.

Composition:

Copper (Cu): Approximately 60-63%
Zinc (Zn): Approximately 35-37%
Lead (Pb): ≤ 0.2%
Arsenic (As): Approximately 0.02-0.15%

Grades

JIS C33000:

Japanese Industrial Standard designation for low leaded brass.
Specifies the composition and mechanical properties for this type of brass.

ISO C330:

International Organization for Standardization (ISO) designation for a specific type of low leaded brass.
Specifies the requirements for copper-zinc alloys with low lead content.

EN CW705R:

European standard designation for low leaded brass.
Specifies the composition and properties for copper-zinc alloys with enhanced resistance to dezincification and low lead content.

Properties:

Corrosion Resistance:
- Excellent resistance to dezincification, especially in aggressive and saline environments.
- Good general corrosion resistance, suitable for various applications.
Mechanical Properties:
- Tensile Strength: Typically around 450-600 MPa.
- Yield Strength: Approximately 150-300 MPa.
- Elongation: Generally around 20-40%, indicating good ductility.
- Hardness: Moderate hardness, with a typical Brinell hardness number (HB) of around 100-150.
Thermal and Electrical Conductivity:
- Good thermal conductivity, suitable for plumbing and heating systems.
- Moderate electrical conductivity, less than pure copper but sufficient for many industrial uses.

Applications:

Plumbing Systems: Extensively used in domestic and commercial plumbing systems, including fittings, valves, and connectors, due to its resistance to dezincification and ease of machining.
Water Treatment: Employed in water treatment facilities and components exposed to aggressive water conditions.
Industrial Applications: Used in industrial equipment where resistance to corrosion and mechanical strength are critical.
Marine Applications: Suitable for marine hardware and components exposed to seawater due to its corrosion resistance.