Brass San Antonio, TX

Karl Gillihan

🟡 BRASS

Brass Machining & Suppliers in San Antonio, TX

Brass is the material of choice when you need parts that machine fast, resist corrosion, and look good doing it. San Antonio's screw-machine and turning shops run C360 by the truckload for fittings and fluid components, while C260 and naval brass handle forming and marine duty.

ISO 9001ISO 14001AS9100

Brass occupies a specific and valuable niche in San Antonio manufacturing: high-volume machined parts. The combination of excellent machinability, good corrosion resistance, and attractive appearance makes it the default for turned components like fittings, valve bodies, connectors, hose ends, and fluid-system hardware. Automotive supply work around the Toyota plant, plumbing and HVAC components, and energy-sector fluid fittings all generate steady brass demand. What sets brass apart is throughput. Free-machining brass runs faster on CNC lathes and screw machines than almost any other metal, which makes it economical for the high-piece-count jobs that fill production shops. A San Antonio turning shop running fittings or connectors can hold tight tolerances at high spindle speeds with long tool life, which is exactly why brass remains the go-to where the application allows it. The grade choice within brass then comes down to whether the part is machined, formed, or exposed to marine conditions.

Grade Selection: C360, C260, Naval Brass

C360 free-cutting brass is the machinist's brass. With a machinability rating of 100, the benchmark against which all other metals are measured, it cuts faster and cleaner than anything else and produces excellent surface finishes with long tool life. It contains lead that acts as a chip breaker and lubricant, making it ideal for screw-machine and CNC-turned production of fittings, fasteners, valve components, and connectors. When a part is primarily machined in volume, C360 is almost always the right call. C260 cartridge brass is the forming grade. Its higher zinc content and absence of significant lead give it excellent ductility and cold-formability, so it bends, draws, and stamps well, suiting sheet and formed components, ammunition cases, and deep-drawn parts. It machines far less easily than C360, so it is chosen for formability, not machining. Naval brass (C464) adds about 1 percent tin to resist dezincification, the selective leaching of zinc that destroys ordinary brass in seawater. That makes naval brass the choice for marine hardware, fittings, and components exposed to saltwater or brackish conditions where standard brass would fail.

Sourcing Brass for San Antonio Production Runs

Brass sourcing is largely a production-quantity conversation. For high-volume turned parts, the priority is a shop with screw-machine or multi-spindle and CNC-lathe capacity that can run C360 efficiently and hold tolerance across thousands of pieces. Bar stock in standard hex, round, and square sizes is readily available, and brass price, like copper, tracks the metal market because of its copper and zinc content, so larger buys benefit from market-aware timing. For formed parts, look for a fabricator equipped for C260 forming rather than a pure turning shop. For marine work, confirm the supplier stocks and certifies naval brass to guarantee dezincification resistance. Certification follows the application: ISO 9001 for general commercial and automotive work, AS9100 with traceability for any aerospace fittings, and material certs confirming the alloy and any low-lead compliance. Use ManufacturingBase to filter San Antonio suppliers by brass grade, turning versus forming capability, production volume, and certification so high-piece-count, formed, and marine work each go to the right partner.

Machining, Finishing, and Lead-Free Considerations

Machining C360 is about as easy as metalworking gets, but there are still details that matter. High spindle speeds, sharp tooling, and the right chip control deliver excellent finishes, and the long tool life keeps per-part cost low in production. Shops can hold tight tolerances and produce parts that often need no secondary finishing because as-machined brass already looks clean. The significant modern consideration is lead content. Traditional C360 contains lead, and regulations such as those governing drinking-water components restrict lead in parts that contact potable water. For plumbing and fluid applications subject to these rules, low-lead or lead-free brass alternatives are required, and they machine somewhat less freely than leaded C360. If your part touches potable water or falls under low-lead regulations, confirm the alloy meets the applicable standard before production. For finishing, brass can be left bare, polished, or plated; many fittings ship as-machined, while decorative or contact parts may be plated. Always specify any lead-content requirement up front, since it changes both alloy selection and machining parameters.

Frequently Asked Questions

C360 free-cutting brass holds a machinability rating of 100, and it is literally the benchmark against which the machinability of all other metals is measured. It earns that rating because its composition, including lead that acts as a chip breaker and internal lubricant, lets it cut cleanly at high spindle speeds with minimal cutting force, excellent surface finishes, and very long tool life. Chips break into small pieces and clear easily instead of forming long strings, which keeps automated screw machines and CNC lathes running unattended. For San Antonio's production turning shops, that translates directly into low per-part cost and high throughput on fittings, connectors, valve components, and fasteners. The practical impact is that a C360 part can run several times faster than the same geometry in stainless or even aluminum, with tighter tolerances held more easily and less tool wear. The main caveat is lead content: where parts contact potable water or fall under low-lead regulations, you must switch to a low-lead or lead-free brass, which machines somewhat less freely but still well.

Use C260 cartridge brass when the part is formed rather than machined. C260 has higher zinc content and lacks the significant lead that makes C360 so machinable, but in exchange it offers excellent ductility and cold-formability. That makes it the right grade for parts that are bent, drawn, stamped, or deep-drawn, such as sheet components, enclosures, terminals, and the classic application of ammunition cases. If you tried to deep-draw C360, its leaded, free-machining composition would crack, and if you tried to machine large volumes of C260, you would get worse finishes and shorter tool life than C360 delivers. So the decision is fundamentally about the dominant process: choose C360 for high-volume turned and machined parts, and choose C260 for formed, drawn, and stamped parts. Some components involve both, in which case the part designer weighs which property matters more. In San Antonio, turning shops stock C360 while fabricators set up for forming work carry C260, so identifying the process up front also points you to the right type of supplier.

Naval brass (C464) differs from ordinary brass by the addition of about 1 percent tin, which gives it resistance to dezincification, the selective corrosion process where zinc leaches out of brass in saltwater or brackish environments, leaving behind weak, porous copper that fails structurally. Standard brasses like C360 and C260 are vulnerable to this in marine service, so naval brass exists specifically to solve it. You need naval brass when the part will be exposed to seawater, brackish water, or marine atmospheres: marine hardware, fittings, valve components, fasteners, and pump parts in saltwater service. For inland, freshwater, automotive, or general industrial applications with no salt exposure, naval brass is unnecessary and you can use cheaper standard grades. The cost of getting this wrong is real, since ordinary brass in seawater can dezincify and fail over time, so for any genuinely marine or saltwater-exposed component, specify naval brass and confirm the supplier certifies the C464 alloy. In San Antonio's largely inland market, naval brass is a specialty order rather than a stocked staple, so verify availability.

Lead-free regulations significantly affect brass selection for any part that contacts potable water. Traditional C360 and many standard brasses contain lead, which improves machinability but is restricted in drinking-water components under regulations such as the U.S. Safe Drinking Water Act provisions limiting lead in wetted surfaces of plumbing products. For fittings, valve bodies, connectors, and any component that touches potable water and falls under these rules, you must use a certified low-lead or lead-free brass alloy rather than standard leaded C360. These alternative alloys are engineered to meet the lead-content limits while remaining reasonably machinable, though they cut somewhat less freely than leaded C360, which can mean slightly slower production and more tool wear. The practical steps are to confirm at the design stage whether your part is subject to potable-water lead limits, specify a compliant alloy on the drawing, and require the supplier to provide certification of the alloy and its lead content. Getting this wrong means a non-compliant part that cannot legally be used in drinking-water systems. ManufacturingBase lets you filter suppliers who handle low-lead brass.

Brass pricing moves with the metals market because brass is an alloy of copper and zinc, both of which are traded commodities, so its cost is not stable in the way an engineered specialty alloy might be. Copper is the larger price driver and the more volatile of the two, so when copper prices swing, brass stock pricing follows, plus the influence of zinc. For San Antonio buyers, this means brass should be treated like a commodity procurement: get current quotes when you are ready to order rather than relying on a weeks-old quote, and for larger production buys, track the market and time purchases or negotiate index-linked pricing to smooth volatility. Distributors price brass bar and stock against the underlying metal market plus a fabrication and handling margin. The good news is that brass is widely available in standard hex, round, and square bar for production turning, so availability is rarely the constraint; price timing is. When budgeting a high-volume brass job, build in some allowance for market movement between quote and order, and confirm pricing at the point of purchase.

Last updated: July 2026

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