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.
C4622: 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 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.