Brass Machining & Supply in Chattanooga, TN

C360 free-cutting brass is the benchmark for machinability, rated at 100 percent on the standard machinability scale that other materials are measured against. It earns this through a small lead addition that breaks chips cleanly and lubricates the cut, allowing very high spindle speeds, excellent surface finishes, accurate thread cutting, and long tool life. For high-volume turned parts like fittings, valve bodies, fasteners, and connectors, this translates directly into short cycle times and low per-part cost, which is why Chattanooga screw-machine and CNC turning shops keep C360 in constant production. The material also offers good corrosion resistance and an attractive finish. The main caveat is the lead content: for potable-water applications, regulations restrict lead, so a low-lead brass alternative may be required. For non-drinking-water industrial, automotive, and general hardware applications, C360 remains the most cost-effective and efficient choice for machined brass parts. If your part has significant machining content and does not contact drinking water, C360 is almost always the right grade.

Use C260 cartridge brass when your part is formed rather than machined. C260 has higher ductility and excellent cold-forming characteristics, which make it ideal for deep drawing, stamping, bending, and spinning operations. It is the standard for formed shells, drawn enclosures, electrical terminals and contacts, and decorative hardware produced by forming. C360, by contrast, is optimized for machining and is comparatively brittle, so it does not form well; trying to deep-draw or sharply bend C360 will crack it. The choice comes down to the manufacturing process: if the part is turned, milled, or drilled from bar stock, C360 is best, but if it is stamped, drawn, or bent from sheet or strip, C260 is the right pick. Some assemblies use both, machining certain components from C360 while forming others from C260. When sourcing in Chattanooga, describe the manufacturing method to your supplier so they recommend the correct grade and form. Choosing the wrong one leads to either poor machinability or cracked, failed forming operations.

Standard C360 free-cutting brass contains lead, which is added specifically to improve machinability, and that lead content is restricted in drinking-water applications by regulations such as the U.S. Safe Drinking Water Act and its low-lead requirements. For any component that contacts potable water, including plumbing fittings, valves, and fixtures, you generally cannot use standard leaded brass and must specify a certified low-lead or lead-free brass alloy that meets the applicable regulatory limits. These low-lead brasses are formulated to maintain reasonable machinability while keeping lead content below the regulated threshold. For purely industrial, automotive, or mechanical applications that do not contact drinking water, standard C360 remains perfectly acceptable and more economical. The key is to identify potable-water contact early in the design, because it dictates the alloy and may require certification documentation. When sourcing brass for any water-contact part in Chattanooga, tell your supplier the application explicitly so they provide a compliant grade and the necessary certifications. Using standard leaded brass in a regulated drinking-water part can create both compliance and liability problems.

Naval brass, grade C464, is formulated for saltwater and marine service by adding a small amount of tin, typically around 1 percent, to a copper-zinc brass. This tin addition significantly improves resistance to dezincification, the corrosion process in which zinc selectively leaches out of ordinary brass in aggressive or chloride-rich environments, leaving behind a weak, porous copper structure that fails mechanically. By resisting dezincification, naval brass holds up far better in seawater, marine atmospheres, and other moisture-heavy or saline conditions than common brasses like C360 or C260. This makes it the appropriate choice for marine hardware, fittings, fasteners, valve stems, and components exposed to seawater or coastal environments. It also retains good strength and reasonable machinability. While Chattanooga is inland, naval brass is still specified for equipment destined for marine or harsh-moisture service, or where dezincification resistance is required. If your brass part will face saltwater, chlorides, or persistent aggressive moisture, naval brass is worth specifying over standard brass to prevent premature corrosion failure. A supplier can confirm availability and the best form for your part.