Leaded brass alloys provide high corrosion resistance and strength, which are important in a wide range of applications. However, the addition of lead also allows for enhanced machinability, which is why it’s used in plumbing fixtures, electrical parts, and a range of industrial components.
At Sequoia Brass & Copper, we have decades of experience supplying customers with the right alloy for their application. Below, learn why lead is added to brass and what makes the resulting alloys a reliable choice for demanding applications.
Why Is Lead Added to Brass?
Leaded brass alloys are easier to drill, cut, and mill on the shop floor. Thanks to their lead content, the metal breaks into small chips instead of long, stringy shavings when it’s cut or drilled. The addition of lead also reduces friction and heat generation, which can increase the lifespan of tools. In high-volume production, this can add up to significant savings.
Leaded brass alloys also provide a smoother surface finish, making them a suitable option for visible components or hardware where a precise fit is required. They seal up tightly under pressure, which is important in plumbing and other fluid-handling applications. While existing regulations limit the use of brass and lead combinations in potable water systems, these alloys are still widely used in non-potable systems, as well as other industrial applications where machinability and performance are necessary.
Common Leaded Brass Alloys
Sequoia Brass & Copper works with various leaded brass alloys, including the following:
- C34500 (Leaded Brass). A great choice for hardware applications, with its strength and ease of machinability.
- C36000 (Free-Cutting Brass). This alloy contains roughly 2.5–3.7% lead and is considered the standard for machinability. Free-cutting brass is ideal for use in fast, complex machining processes.
- C35300 (High-Leaded Brass). With its higher lead levels, this alloy offers outstanding machinability. It’s commonly used in precision parts requiring tight tolerances.
- C48500 (High-Leaded Naval Brass). Combines lead’s machinability benefits with added corrosion resistance in marine environments.
In addition to the above, we can also provide low-leaded brass alloys, which are frequently used in plumbing fittings. Once you specify the form and alloy you want, our team can help locate the product for your specific application.
Applications of Leaded Brass Alloys
Sequoia Brass & Copper provides leaded brass alloys for projects requiring durability, precision, and strength. Some industries and components where this alloy is often found include:
- Plumbing fittings. Seal tightly and offer strong resistance to corrosion, making them ideal for faucets, valves, and connectors.
- Electrical connectors & terminals. Provide great conductivity and precise machining for electrical applications.
- Industrial valves & fasteners. Can handle pressure, wear, and corrosion in fluid systems.
- Precision machined parts. Used in locks, gears, decorative hardware, and more, delivering consistency and fine finishes.
Trust Sequoia Brass & Copper for Leaded Brass Supply
With decades of experience supplying brass and copper alloys, Sequoia Brass & Copper offers premium-quality leaded brass products in a variety of forms, including sheets, plates, bars, and custom cuts. Our team knows that each industry has its own unique needs, and we’re here to help you when you choose the alloy that’s the best fit. Whether you’re looking for sheet, plate, bar, or custom-cut material, you can count on us to deliver high-quality metals that meet your specifications.
Ready to explore high-quality leaded brass alloys for your application? Contact us and request a quote today.
