C28000 is another specific type of copper alloy, known as "Muntz Metal" or "60/40 brass".

C28000 copper bar, also known as Muntz Metal or 60/40 brass, has a specific chemical composition that gives it its characteristic properties. Here is the typical chemical composition of C28000 copper bar:

Copper (Cu): Approximately 59.0% to 62.0%

Zinc (Zn): Approximately 38.5% to 41.0%

Iron (Fe): Maximum of 0.10%

Lead (Pb): Maximum of 0.05%

Phosphorus (P): Maximum of 0.05%

These percentages may vary slightly depending on the specific manufacturer or standard, but they give a good general idea of the composition of C28000 copper bar.

Key points about the chemical composition:

Copper (Cu): This is the primary element in C28000, providing the base for the alloy's properties, including conductivity and corrosion resistance.

Zinc (Zn): Zinc is the main alloying element in C28000 brass, which gives it its yellowish color and contributes to its strength and hardness.

Iron (Fe), Lead (Pb), and Phosphorus (P): These elements are present in trace amounts to improve machinability and other specific properties.

Composition: C28000 is primarily composed of copper (Cu) and zinc (Zn), typically around 60% copper and 40% zinc. This composition gives it a golden-yellow color similar to brass.

Mechanical Properties: It exhibits good strength and hardness, making it suitable for structural and load-bearing applications where strength is required.

Corrosion Resistance: C28000 offers moderate corrosion resistance, particularly in freshwater and mildly corrosive environments. It is less resistant to corrosion compared to alloys like naval brass (C44400), which contain higher levels of copper and tin.

Machinability: One of the standout features of C28000 is its excellent machinability. It is relatively easy to cut, shape, and form using common machining techniques, making it ideal for manufacturing processes that require precise shaping and detailing.

Appearance: Its attractive golden color makes it popular in architectural applications where aesthetics are important, such as decorative trim, hardware, and fittings.

Standards: C28000 is specified according to ASTM (American Society for Testing and Materials) standards, such as ASTM B36 for brass plate, sheet, strip, and rolled bar, ensuring consistency and quality in its production and use.

Architectural Uses:

Decorative Trim: C28000 is often used in architectural applications for decorative trim, door and window frames, and ornamental fixtures due to its attractive golden color and corrosion resistance in indoor environments.

Kick Plates: It is utilized for kick plates on doors and other surfaces where both durability and aesthetics are important.

Hardware: The alloy is employed in hardware such as handles, knobs, and hinges, where its strength and corrosion resistance are advantageous.

Industrial Applications:

Fasteners: C28000 is used to manufacture screws, bolts, nuts, and other fasteners due to its excellent machinability and moderate strength.

Gears: The alloy's mechanical properties make it suitable for producing gears and other components that require both strength and machinability.

Valve Stems and Fittings: It is utilized in industrial valve stems, fittings, and pump components where its corrosion resistance and machinability are valuable.

Marine Applications:

Components Not Exposed to Severe Corrosion: While not as corrosion-resistant as naval brass (C44400), C28000 can still be employed in marine environments for components such as fasteners and fittings that are not exposed to highly corrosive conditions.

Electrical Applications:

Connectors: C28000 is used in electrical connectors and terminals due to its good conductivity and machinability.

Switchgear Components: It is employed in switchgear components where its strength and durability are essential.

Other Uses:

Musical Instruments: Parts of brass musical instruments may be made from C28000 due to its acoustic properties and workability.

Coinage: Historically, Muntz Metal has been used in coinage and tokens due to its appearance and durability.