Choosing the right brass grade can feel like reading a menu written in code. C36000, C46400, C26000 — the numbers pile up fast, and picking the wrong one can cost you time, money, and a batch of parts that don't perform. The good news is that once you understand a few basics, the choice becomes much simpler. Each brass grade has a job it does well, and matching the grade to your application is the key to getting reliable results.
At Atlas Bronze, we have supplied brass, bronze, and copper materials from our warehouse in Trenton, New Jersey, since 1994. Over that time, we have helped customers across marine, automotive, plumbing, and general manufacturing pick the right material for the job. In this guide, we break down how brass grades differ, which properties matter most, and how to match a grade to your project without the guesswork.
What Makes One Brass Grade Different From Another
Brass is a copper-zinc alloy, and the ratio of those two metals — plus a few small additions — decides how the material behaves. A grade with more zinc tends to be stronger but harder to machine. A grade with a touch of lead machines cleanly and quickly. Small amounts of tin or aluminum can boost corrosion resistance for parts that face water or weather. In short, the recipe determines the performance, and the performance determines whether a grade fits your application.
Every brass grade carries a UNS number, the standardized code you see written as "C" followed by five digits. These numbers are not random. They give you a consistent way to specify exactly what you need, so the material you order in January matches the material you order in July. When you order by grade rather than by a vague description, you remove the risk of surprises on the shop floor. We carry a wide range of brass alloys in stock, and each one is documented by its UNS grade so you always know what you are getting.
The Three Properties That Should Drive Your Choice
When customers ask us which grade to use, we start with three questions: How will the part be made, how much stress will it carry, and where will it live? Those three factors — machinability, strength, and corrosion resistance — cover most decisions.
Machinability matters most when you produce parts in volume. Free-cutting brass, such as C36000, contains a small amount of lead that lets tools cut fast and clean, which reduces cycle time and tool wear on high-run jobs. Strength matters when a part carries load or pressure. Naval brass, such as C46400, adds tin for extra toughness and holds up well under mechanical stress. Corrosion resistance matters when a part faces moisture, salt, or the outdoors. Grades with tin or aluminum resist dezincification, the process where zinc leaches out and weakens the metal over time. Think of it like choosing tires: a race car, a delivery van, and a snowplow each need a different set, even though they all roll on rubber. Brass works the same way — one family, many purposes.
Matching Common Grades to Real Applications
The fastest way to narrow your options is to look at what similar projects use. A few grades handle the majority of manufacturing work, and knowing their typical uses saves you hours of research.
C36000, free-machining brass, is the go-to for screw machine parts, fittings, valve components, and any job that demands speed and clean threads. C26000, known as cartridge brass, offers excellent formability, which makes it ideal for parts that need to be drawn, stamped, or bent, such as terminals, hardware, and deep-drawn shells. C46000 and C46400, the naval brasses, deliver strength and saltwater resistance for marine fittings, pump shafts, and fasteners exposed to harsh conditions. C28000, or Muntz metal, provides strength at a lower cost for heat exchanger plates and architectural trim. When you know the demands of your part, one or two grades usually stand out as the clear fit, and from there our team can confirm availability, dimensions, and pricing so you can move forward with confidence.
Making the Right Call for Your Next Project
Selecting a brass grade does not have to be complicated. Start with how the part is made, add in how much load it will carry, and finish with the environment it will operate in. Those three answers point you toward the right grade nearly every time, and specifying that grade by its UNS number keeps your orders consistent from one run to the next. The payoff is real: fewer scrapped parts, predictable machining, and components that last as long as your customers expect.
If you are weighing a few options and want a second opinion, that is exactly what we are here for. Our sales staff has spent years helping small shops and large manufacturers alike find the grade that fits the job and the budget. Bring us your application, and we will help you match it to reliable material — stocked, documented, and ready to ship from our depots across the United States.
Frequently Asked Questions About Brass Alloys
What is the difference between brass and bronze?
Brass is an alloy of copper and zinc, while bronze is primarily an alloy of copper and tin. The difference in composition gives each metal distinct traits. Brass tends to be easier to machine and form, making it a common choice for fittings and hardware. Bronze often offers greater wear resistance and load-bearing strength, which suits bearings and bushings. We supply both, and we can help you decide which fits your application.
Which brass grade is easiest to machine?
C36000, often called free-cutting or free-machining brass, is the standard for high-volume machined parts. Its small lead content lets cutting tools work quickly and cleanly, which reduces cycle time and tool wear. If your project involves screw machine work, threading, or precision fittings produced in quantity, C36000 is usually the most efficient choice.
Is brass corrosion resistant?
Brass offers good corrosion resistance in many environments, though performance varies by grade. For parts exposed to saltwater or moisture, naval brasses such as C46400 add tin to resist dezincification, the process where zinc leaches out and weakens the metal. If your part will operate outdoors or in marine conditions, choosing a corrosion-resistant grade helps extend its service life.
How do I know which brass grade my project needs?
Start with three factors: how the part will be manufactured, how much stress it will carry, and the environment it will operate in. Those answers point you toward the right balance of machinability, strength, and corrosion resistance. If you are unsure, share the details of your application with our team, and we will help you match the grade to the job.
Does Atlas Bronze stock brass in different shapes and sizes?
Yes. We stock brass in a range of forms and grades to meet diverse manufacturing needs, and we ship nationwide from our Trenton, NJ headquarters and several depot locations across the country. Whether you need standard stock or a specific grade for a specialized application, we provide reliable availability and fast distribution so you can keep your projects on schedule.
Atlas Bronze is a supplier and distributor of brass, bronze, and copper materials based in Trenton, New Jersey, serving manufacturers across marine, automotive, aerospace, and general industry since 1994. We help customers source the right alloy for their application, with reliable stock and nationwide shipping. Contact us to find the grade that fits your next project.
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