Brass Machining & Supply in Eugene, OR

C360 free-machining brass is the standard against which the machinability of nearly every other metal is measured, often rated at 100 percent machinability. It cuts cleanly and quickly, produces small chips that clear easily rather than long stringy ones, gives an excellent surface finish, and causes very little tool wear. For a Eugene shop running high-volume turned parts on CNC lathes or screw machines, those properties translate directly into faster cycle times, longer tool life, and lower cost per part, which is why fittings, fasteners, valve bodies, connectors, and similar hardware are so commonly made from C360. The free-machining behavior comes from a small amount of lead in the alloy, which acts as a chip breaker and lubricant during cutting. That lead is also the one limitation: C360 is not suitable where lead-free requirements apply, which matters for certain potable-water components under current plumbing regulations. For those applications, a low-lead brass alloy is specified instead, with some sacrifice in machinability. But for general machined parts where lead is not restricted, C360 is almost always the most economical and efficient brass to specify, and most local shops will have it readily available and their processes tuned for it.

You need naval brass when the part will see seawater or another aggressive aqueous environment where dezincification is a risk. Dezincification is a corrosion process in which zinc is selectively leached out of the brass, leaving behind a weak, porous, copper-rich structure that can fail under pressure or load. Ordinary high-zinc brasses, including C360, are vulnerable to this in marine and certain aggressive water conditions. Naval brass is specifically formulated with added tin to resist dezincification, which is why it is the standard for marine hardware, valve stems, fittings, and components that operate in seawater or harsh aqueous service. The trade-off is that naval brass machines a bit less freely than C360 and costs more, so you would not use it for general dry or indoor hardware where the corrosion threat does not exist. The decision rule is straightforward: if the part is exposed to seawater or aggressive water and structural integrity matters, specify naval brass (or another dezincification-resistant grade); if it is general fittings, electrical hardware, or parts in mild conditions, C360 is fine and more economical. When in doubt about the water chemistry, err toward the dezincification-resistant grade, because the failure mode is insidious and the part can look fine externally while weakening internally.

The choice depends entirely on how the part is made. C360 free-machining brass is for parts that are machined, turned, milled, or run on a screw machine, because its outstanding machinability gives fast, clean cutting and excellent finish. C260 cartridge brass, a 70/30 copper-zinc alloy, is for parts that are formed, drawn, stamped, or bent, because it has excellent cold ductility and forms without cracking, whereas the lead in C360 that makes it machine well actually causes problems during heavy forming. So the rule is: turned and machined parts go to C360, formed and drawn parts go to C260. For example, a machined valve body or threaded fitting would be C360, while a deep-drawn enclosure, a stamped terminal, or a part requiring significant bending would be C260. Both have good corrosion resistance and reasonable conductivity. If a part involves both significant machining and significant forming, you and the shop will need to weigh which process dominates and possibly reconsider the design. When you bring a part to a Eugene shop, describe the manufacturing process you envision, and they can confirm the right grade, since selecting based on the process rather than just calling it brass is what keeps cost and quality where you want them.

Lead-free regulations primarily affect brass used in potable-water systems, and they have pushed some applications away from traditional leaded brass like C360 toward low-lead or lead-free brass alloys. Federal and state rules limit the allowable lead content in components that contact drinking water, such as fittings, valves, and fixtures in plumbing systems. Traditional free-machining C360 contains lead, which is what gives it excellent machinability, so it does not meet these requirements for potable-water contact surfaces even though it remains perfectly appropriate for countless non-potable applications. For drinking-water components, manufacturers use low-lead brass alloys that meet the regulatory limits while sacrificing some machinability. The practical implication for a Eugene buyer is that you must confirm whether your part is a potable-water contact component before specifying the grade, because choosing leaded C360 for a drinking-water fitting creates a compliance problem, while unnecessarily specifying a harder-to-machine low-lead alloy for a non-potable part adds cost without benefit. For general equipment, electrical, industrial, and non-potable applications, leaded brass remains the economical and efficient choice. When the application touches drinking water, discuss the lead-free requirement explicitly with your supplier and confirm the alloy meets the applicable standard, and request certification to document compliance.

Common brass grades are readily available in the Eugene market. C360 free-machining brass and C260 cartridge brass in standard bar, rod, and sheet are stocked at regional metal service centers and reach Eugene quickly from the Portland distribution corridor, usually within a day or two. More specialized grades like naval brass and specific lead-free alloys may not be shelved in every size, so for particular dimensions plan a week or more. Because brass is a copper-zinc alloy, its pricing tracks the copper and zinc commodity markets and quotes carry shorter validity windows, so lock in pricing when ready; the upside is that brass scrap and offcuts retain good recovery value, which matters on high-volume machining jobs. As for joining, brass solders and brazes well, which is the standard method for plumbing fittings and assemblies, producing clean, reliable, leak-tight joints with proper technique and clean surfaces. Brass also takes plating readily for appearance or improved electrical contact, and threaded brass connections are extremely common in fittings and hardware. For most Eugene plumbing, electrical, and equipment work, soldering, brazing, threading, and bolting cover the joining needs without difficulty. When the grade matters for corrosion or compliance, request mill certifications to confirm composition.