🟡 BRASS
Brass Machining & Supply in Roanoke, VA
If a Roanoke shop runs a screw machine or a bar-fed lathe at volume, odds are brass is in the chuck. C360 free-cutting brass machines faster than nearly any metal and dominates fittings and turned hardware, C260 cartridge brass bends and draws where formability matters, and naval brass holds up where saltwater and dezincification threaten ordinary alloys. Choosing among them is mostly a question of machining versus forming versus corrosion.
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C360 free-cutting brass is the benchmark machining material, the alloy whose machinability rating of 100 every other metal is measured against. Its lead content produces short, clean chips and exceptional tool life, which is why it is the default for high-volume turned parts: fittings, valve components, threaded inserts, gears and precision hardware. For a Roanoke job shop running production quantities, C360 is the alloy that keeps spindles turning and cycle times short.
C260 cartridge brass trades some machinability for excellent cold-forming ability. With about 70 percent copper and 30 percent zinc, it has the ductility to be deep-drawn, stamped, spun and bent without cracking, so it is the choice for formed components, enclosures, decorative hardware and parts made by forming rather than cutting. Where C360 is for the lathe, C260 is for the press and brake.
Naval brass adds a small amount of tin to a 60/40 brass, and that tin inhibits dezincification, the selective leaching of zinc that destroys ordinary brass in marine and high-chloride environments. It is the corrosion-resistant member of the family, used for marine hardware, fasteners and fittings exposed to saltwater or aggressive water chemistry. When a brass part is failing by turning pink and porous, dezincification is the culprit and naval brass is usually the fix.
Why Brass Owns the High-Volume Turning Work
Brass is the economic backbone of production machining, and that shapes how Roanoke shops quote it. C360's free-cutting behavior means high spindle speeds, minimal tool wear, and reliable chip control, all of which drive down cost per part on screw-machine and CNC-lathe work. For runs of fittings, bushings, fasteners and valve parts measured in the thousands, brass often beats steel and aluminum on total machined cost even though the raw material costs more per pound, because the machine time and tooling savings are so large.
That economic profile makes brass the natural choice for the high-mix, repeat-order hardware that supports Roanoke's machinery and equipment manufacturers. Tolerances of +/- 0.001 to +/- 0.002 inch are routine on turned brass features, and the alloy takes fine threads cleanly. When you are sourcing volume turned parts, the right conversation with a Roanoke shop is about cycle time and total cost across the run, where brass frequently wins, rather than just the per-pound material price.
Dezincification, Finishing and Lead-Free Options
Brass corrosion in service almost always comes back to dezincification, where zinc leaches out and leaves a weak, porous copper structure. In Roanoke's water and any chloride-exposed application, this is the failure to design against: specify naval brass or an inhibited (dezincification-resistant) alloy where the part contacts aggressive water or marine conditions, rather than discovering the problem after parts go porous in the field.
Finishing brass is usually about appearance and corrosion: brass takes plating well, and parts are often nickel- or chrome-plated for wear and looks or clear-coated to preserve the natural finish. One regulatory note matters for any brass part in potable-water service: traditional leaded brasses like C360 face restrictions under low-lead drinking-water rules, so plumbing and potable-contact parts increasingly require lead-free brass alloys. When you spec brass for anything touching drinking water, confirm the alloy meets the applicable low-lead requirement. For general industrial fittings and hardware away from potable water, C360 remains the efficient, cost-effective standard.
Frequently Asked Questions
C360 free-cutting brass is the most widely used machining brass because it is the benchmark for machinability itself, the alloy rated 100 on the scale against which every other metal's machinability is measured. Its lead content causes the material to form short, clean, broken chips rather than long stringy ones, which means high spindle speeds, excellent surface finish, minimal tool wear and reliable automated chip clearing. For Roanoke job shops running screw machines and bar-fed CNC lathes at production volume, that translates into short cycle times and low tooling cost, so even though brass costs more per pound than steel, the total machined cost per part is often lower on high-volume runs of fittings, valve components, threaded inserts and precision hardware. Tolerances of +/- 0.001 to +/- 0.002 inch are routine and fine threads cut cleanly. The one caveat is potable-water service, where leaded brasses like C360 face low-lead regulatory restrictions and a lead-free alloy is required. For general industrial fittings and hardware away from drinking water, C360 remains the efficient default choice.
Dezincification is a corrosion process unique to brass in which the zinc is selectively leached out of the alloy, leaving behind a weak, porous, spongy copper structure that has lost its mechanical strength. The classic visual sign is a brass part that has turned pinkish and become porous or brittle. It occurs most aggressively in marine environments, high-chloride water, and certain aggressive water chemistries, and it is the most common way brass parts fail in service. The prevention is material selection: specify naval brass, which adds a small amount of tin to inhibit dezincification, or an inhibited dezincification-resistant brass alloy, anywhere the part will contact saltwater, brackish water, or aggressive water. The mistake to avoid is using an ordinary high-zinc brass like a standard 60/40 alloy in a marine or chloride application and discovering the failure only after parts go porous in the field. For a Roanoke buyer, the rule is to describe the water or marine exposure to your supplier up front so the right dezincification-resistant alloy is chosen at the design stage rather than as a costly field correction.
Choose C260 cartridge brass over C360 when the part is made by forming rather than machining. C260 is about 70 percent copper and 30 percent zinc, and that composition gives it excellent ductility, so it can be deep-drawn, stamped, spun, rolled and bent into shape without cracking. That makes it the right choice for formed enclosures, drawn shells, decorative hardware, and any part produced on a press or brake rather than a lathe. C360, by contrast, contains lead to make it free-machining, which is excellent for cutting but makes it less suited to heavy cold forming because it is more prone to cracking when bent or drawn. So the decision comes down to the dominant manufacturing process: if you are turning, milling or drilling a part with significant chip removal, C360 gives you the best machinability and lowest cycle time; if you are forming the part by bending, drawing or stamping, C260 gives you the formability you need. For a Roanoke shop, matching the brass alloy to the process, machining versus forming, is the key to both quality and cost.
Yes, lead content is a real regulatory consideration for any brass part that contacts potable water. Traditional free-machining brasses like C360 contain lead, which is what makes them machine so well, but low-lead drinking-water regulations restrict the allowable lead content of components in contact with potable water. That means plumbing fittings, valve bodies, and any part in a drinking-water system increasingly must be made from lead-free or low-lead brass alloys that meet the applicable standard, rather than standard C360. If you are sourcing brass parts for potable-water service in Roanoke, confirm with your supplier that the alloy meets the relevant low-lead requirement before production, because using a standard leaded brass in a regulated potable application can make the parts non-compliant and unusable. For the large category of general industrial work, machinery fittings, hardware, fasteners and components away from drinking-water contact, leaded C360 remains fully appropriate and is the cost-effective standard. The key is to flag potable-water contact at the quoting stage so the correct compliant alloy is specified from the start.
Last updated: July 2026
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