Materials

Brass C464 (C46400 Naval Brass)

• Material: A copper-zinc alloy with a small addition of tin, designed specifically for marine and industrial applications where strength and corrosion resistance are needed.

• Mechanical Properties:

  • Higher strength than free-cutting brasses like C360 (yield strength ~25–30 ksi annealed, up to ~50+ ksi cold worked).

  • Good toughness and ductility.

  • Maintains mechanical properties better than standard brass in marine environments.

• Corrosion Resistance:

  • Excellent resistance to seawater corrosion, erosion, and dezincification.

  • Tin addition improves resistance to saltwater attack compared to typical brasses.

  • Good resistance to atmospheric and mild industrial environments.

  • Can be subject to stress corrosion cracking in ammonia-containing environments.

• Manufacturing Considerations:

  • Good machinability (though lower than Brass 360 since it lacks the lead content).

  • Readily hot-worked, cold-worked, and forged.

  • Soldering and brazing are excellent; welding requires special procedures.

  • Often chosen for fasteners requiring both strength and corrosion resistance, rather than ease of machining alone.

• Applications in Fasteners & Components:

  • Marine fasteners (bolts, nuts, studs, screws) used in shipbuilding, offshore platforms, and seawater piping systems.

  • Pump shafts, propeller shafts, and valve stems exposed to seawater.

  • Heat exchanger components and condenser fasteners.

  • Industrial hardware where corrosion resistance and toughness are important.