NAVAL BRASS
Lead-Free Naval Brass is a high-strength, corrosion-resistant copper-zinc alloy with a small addition of tin to enhance its resistance to seawater corrosion. It is widely used in marine and industrial applications due to its excellent mechanical properties and durability.
Composition
- Copper (Cu):Approximately 60%
- Zinc (Zn):Approximately 39%
- Tin (Sn):Approximately 1%
- Lead (Pb): <0.09% (Lead Free)
GRADES
IS 291 Grade I or II:
- Indian Standard for Naval Brass.
- Grade I or II: Designations for different grades of Naval Brass under this standard.
BS 2874 CZ 112:
- British Standard for copper and copper alloys.
- CZ 112: Designation for Naval Brass in this standard.
JIS 3250 C4622:
- Japanese Industrial Standard for copper and copper alloy seamless tubes.
- C4662: Japanese designation for Naval Brass.
ASTM C48200, C48500, C46200, C46400:
- ASTM Standard Specifications for different grades of Naval Brass.
- C48200: Designation for a specific grade of Naval Brass.
- C48500: Designation for a specific grade of Naval Brass.
- C46200: Designation for a specific grade of Naval Brass.
- C46400: Designation for a specific grade of Naval Brass.
EN 12167 CW 714R:
- European standard for copper and copper alloys – Profiles and bars for general purposes.
- CW 714R:European designation for Naval Brass.
Properties:
- Corrosion Resistance:
- Excellent resistance to corrosion in seawater and marine environments.
- Resistant to dezincification, stress corrosion cracking, and biofouling.
- Mechanical Properties:
- Tensile Strength:Typically around 450-600 MPa.
- Yield Strength: Approximately 150-300 MPa.
- Elongation: Generally around 25-45%, indicating good ductility
- Hardness: Moderate to high hardness, with a typical Brinell hardness number (HB) of around 100-150.
- Thermal and Electrical Conductivity:
- Good thermal conductivity, suitable for heat exchangers and other thermal applications.
- Moderate electrical conductivity, less than pure copper but sufficient for many industrial uses.
Applications:
- Marine Applications: Used extensively in shipbuilding, propeller shafts, marine hardware, and other components exposed to seawater.
- Industrial Applications: Employed in various industrial equipment, including heat exchangers, condensers, and piping systems.
- Mechanical Components: Used for making valves, fasteners, and other mechanical components requiring good strength and corrosion resistance.
- Architectural Applications: Utilized in decorative and architectural elements due to its aesthetic appearance and workability.
