C464 Naval Brass Bar Blanks

C464 naval brass bar blanks are the definitive copper-zinc alloy for marine and seawater service, engineered to resist the dezincification corrosion that degrades standard brass alloys in saltwater environments. The composition of approximately 60% copper, 39.25% zinc, and 0.75% tin creates a microstructure that maintains its integrity in continuous seawater exposure, where ordinary yellow brass would suffer selective leaching of zinc. The tin addition is the critical difference between naval brass and standard Muntz metal. Even at less than 1%, tin fundamentally changes the alloy's corrosion behavior by stabilizing the beta phase against dezincification. This protection mechanism has been proven over more than a century of service in naval hardware, with C464 remaining the standard material for propeller shafts, through-hull fittings, valve stems, and structural fasteners on commercial and military vessels. Mechanical properties of C464 exceed those of most other brass alloys. With tensile strength of 75,000 psi in the half-hard condition and good fatigue resistance, naval brass provides the structural capability needed for propeller shafts, rigging hardware, and fasteners subject to cyclic loading. The alloy also exhibits excellent hot forgeability for complex shapes. Machinability of C464 rates approximately 30 on the CDA scale (where C360 is 100), making it significantly more difficult to machine than leaded brass alloys. Sharp tooling, positive rake angles, and adequate coolant are required. The absence of lead also makes C464 compliant with lead-free requirements for potable water components under NSF/ANSI 61. Our C464 naval brass bar blanks are saw-cut from certified mill stock in diameters from 3/8 inch through 2 inches.