COPPER-LEAD-ZINC ALLOYS
DZR Brass, a type of dezincification-resistant brass, is specifically designed to prevent the selective leaching of zinc, which can lead to the weakening of the alloy. This lead-free brass variant is widely used in applications requiring high corrosion resistance, particularly in plumbing and water-related systems.
Composition
- Copper (Cu):Approximately 60-63%
- Zinc (Zn):Approximately 35-37%
- Arsenic (As):Approximately 0.02-0.15%
- Lead (Pb): <0.1% (Lead Free)
GRADES
JIS C36300:
- Japanese Industrial Standard designation for DZR Brass.
- Specifies the composition and mechanical properties for this type of brass.
ISO CuZn37:
- International Organization for Standardization (ISO) designation for a specific type of brass.
- Specifies the requirements for copper-zinc alloys with dezincification resistance.
EN CW508L:
- European standard designation for brass.
- Specifies the composition and properties for copper-zinc alloys with enhanced resistance to dezincification.
Properties:
- Corrosion Resistance:
- Excellent resistance to dezincification, particularly in aggressive and saline environments.
- Good resistance to general corrosion, pitting, and stress corrosion cracking.
- 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.
- 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.
