63/37 Brass

63/37 Brass

Lead-Free Brass 63/37, also known as Cartridge Brass, is a widely used copper-zinc alloy with excellent cold-working properties, making it suitable for a variety of applications requiring good strength, ductility, and corrosion resistance.

Composition:

  • Copper (Cu): 63%
  • Zinc (Zn): 37%
  • Lead (Pb): <0.09% (Lead-Free)

Grades

ASTM B135 C27000:

  • ASTM B135: Standard Specification for Seamless Brass Tube.
  • C27000: Designation for 63/37 Brass in this standard.

JIS H3300 C 2700:

  • Japanese Industrial Standard for copper and copper alloy seamless tubes.
  • C 2700: Japanese designation for 63/37 Brass.

ISO 1637 CuZn37:

  • International Standard for copper and copper alloy tubes.
  • CuZn37: Designation for 63/37 Brass.

ASTM C27200:

  • Another designation for 63/37 Brass under ASTM standards.

IS4413 Grade I&II:

  • Indian Standard for copper and copper alloys.
  • Grade I & II: Designations for different grades of 63/37 Brass.

EN 12449 CW 507L:

  • European standard for copper and copper alloys – Seamless, round tubes for general purposes.
  • CW 507L: European designation for 63/37 Brass.

Properties:

  1. Corrosion Resistance:
    • Good resistance to corrosion in various environments, including freshwater and mildly acidic conditions.
    • Resistant to dezincification and stress corrosion cracking.

  2. Mechanical Properties:
    • Tensile Strength: Typically around 300-550 MPa.
    • Yield Strength: Approximately 100-200 MPa.
    • Elongation: Generally around 25-45%, indicating good ductility.
    • Hardness: Moderate hardness, with a typical Brinell hardness number (HB) of around 80-110.

  3. Thermal and Electrical Conductivity:
    • Good thermal conductivity, making it suitable for heat exchangers and other thermal applications.
    • Moderate electrical conductivity, less than pure copper but sufficient for many industrial uses.

Applications:

  • Plumbing and Heating: Used in plumbing systems, fittings, and valves due to its corrosion resistance and mechanical properties.

  • Industrial Applications: Employed in various industrial equipment, including marine hardware, fasteners, and components requiring good mechanical strength.

  • Electrical Applications: Used in electrical connectors and components where moderate conductivity is sufficient.

  • Architectural Applications: Utilized in decorative and architectural elements due to its aesthetic appearance and workability.

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