Brass Machining and Supply in Fargo, ND — C360, C260 & Naval Brass

C360 free-machining brass (UNS C36000, 61.5% copper, 35.5% zinc, 3% lead) is the most widely machined non-ferrous alloy in Fargo's CNC turning shops, and with good reason: its machinability rating of 100% (the reference standard against which all other metals are measured) means shops can run it at maximum spindle and feed rates with long tool life, producing clean short chips that don't interfere with cutting. For high-volume production of threaded fittings, valve stems, connector bodies, standoffs, and manifold inserts, C360 delivers per-part economics that no other copper alloy approaches. The alloy's machinability advantage comes from its lead content: the fine lead particles distributed throughout the brass matrix lubricate the tool-chip interface and cause chips to fracture at short lengths rather than curling into long stringers. At surface speeds of 300–600 SFM with carbide tooling, C360 produces chips that look like rice — short, discrete, and easy to manage in automated bar-feed turning cells. Multi-spindle screw machines and CNC Swiss-turn centers running C360 are a common sight in Fargo's job shop sector, producing fittings and connector components for agricultural irrigation systems, plumbing assemblies destined for construction projects across the Dakotas and Minnesota, and fluid-system components for equipment manufacturers. Buyers should note that C360's lead content (approximately 3%) makes it a restricted material under RoHS and REACH regulations in European export applications and in plumbing fittings regulated under the Safe Drinking Water Act (SDWA) lead content limits — currently 0.25% weighted average lead in wetted surfaces for NSF 61/NSF 372 compliance. For potable water contact applications, C360 must be replaced by a lead-free brass such as C46400 (Naval brass, 0.8–1.5% tin, no intentional lead) or C35300 (semi-free-cutting, reduced lead). Fargo shops with experience in agricultural and municipal water-system components know this distinction and can advise on appropriate grade selection.

C260 cartridge brass (UNS C26000, 70% copper, 30% zinc) is the deep-drawing standard of the brass family. Its combination of high zinc content and face-centered cubic crystal structure gives it exceptional cold-forming ductility — it can be drawn, stamped, and formed to shapes that would crack higher-zinc or leaded brasses during the operation. The name 'cartridge brass' references its historical application in ammunition cases, and the deep-draw formability that made it ideal for cartridge case drawing makes it equally useful for stamped electrical terminals, formed tube fittings, instrumentation housings, and decorative hardware in Fargo's manufacturing supply chain. For Fargo buyers in the ag-equipment sector, C260 shows up in stamped terminal blocks and bus connections for electronic control modules on modern precision-farming equipment. The growing technology hardware sector in Fargo — supported by North Dakota State University's engineering programs and the associated startup and contract manufacturing ecosystem — uses C260 for formed EMI shielding enclosures, connector shells, and terminal stampings that require tight-radius bending without cracking. Standard temper designations for C260 forming applications run from H01 (quarter-hard) for formed parts requiring moderate strength, to O60 (soft anneal) for the tightest-radius deep-draw applications. C260 in tube form is widely used in heat exchanger applications throughout North Dakota's grain drying and food processing infrastructure. Straight-tube heat exchangers for grain dryers, condensers for refrigeration equipment in food storage facilities, and HVAC coil assemblies use C260 tube at typical wall thicknesses of 0.020"–0.049" for its combination of corrosion resistance, thermal conductivity (70 BTU/hr·ft·°F), and ease of bending and flaring. Distributors in Minneapolis stock C260 drawn tube in straight lengths from 0.25" through 1.5" OD with one to three day delivery to Fargo for standard wall thicknesses.

Naval brass (C46400, UNS C46400, 60% copper, 39.2% zinc, 0.8% tin) was developed to address dezincification — the selective leaching of zinc from brass that leaves a porous, weak copper-rich layer in the presence of hot, slightly acidic, or soft water. Standard C260 and even C360 are susceptible to dezincification in certain water chemistries and elevated temperatures. Naval brass's tin addition (0.8–1.5%) significantly inhibits dezincification, making it the standard specification for marine, water-treatment, and potable-water applications where standard brass grades would fail prematurely. In the Fargo region, naval brass finds use in agricultural irrigation fittings and valve bodies exposed to irrigation water with variable chemistry, pump impellers and wear rings in water handling equipment, and structural marine components shipped through the region for river and lake infrastructure projects in the broader Missouri-Red River drainage area. C46400 in the hot-rolled or extruded condition provides tensile strength of 55,000–65,000 psi and good corrosion resistance for the outdoor environment. For buyers specifying brass components for outdoor equipment operating in North Dakota conditions, the dezincification resistance of naval brass versus standard C360 represents a genuine service-life advantage. Field-replacement fittings on irrigation pivots in the Red River Valley have documented failures from dezincification in C260-specified brass after five to eight years of service in groundwater with elevated chloride and carbonate content, while naval brass replacements in the same systems have performed beyond 15 years. The material cost premium for C46400 over C36000 is typically 15–25%, which is modest relative to the maintenance and downtime cost of premature fitting replacement during irrigation season.