What is C28000 brass?
Brass is a specific term that refers to a variety of copper-zinc alloys having properties that include electrical and thermal conductivity, strength, hardness, wear-resistance, ductility and corrosion-resistance.
Brasses are available in a wide range of colors such as yellow, red, silver and gold etc. These colored brasses are used by designers and architects to improve the inside and outside appearances of buildings.
UNS C28000 alloys are a type of brass alloys. The following datasheet provides an overview of these brass alloys.
Chemical Composition
The chemical composition of UNS C28000 brass alloys is outlined in the following table.
| Element | Content (%) |
|---|---|
| Cu | 59-63 |
| Fe | 0.070 |
| Pb | 0.30 |
| Zn | 40 |
Physical Properties
The following table shows the physical properties of UNS C28000 brass alloys.
| Properties | Metric | Imperial |
|---|---|---|
| Melting point-liquidus | 904°C | 1660°F |
| Melting point-solidus | 899°C | 1650°F |
| Density | 8.39 gm/cm3 @ 20°C | 0.303 lb/in3 @ 68°F |
Mechanical Properties
The mechanical properties of UNS C28000 brass alloys are displayed in the following table.
| Properties | Metric | Imperial |
|---|---|---|
| Hardness, Rockwell F | 78 | 78 |
| Tensile strength | 360 MPa | 52200 psi |
| Yield strength | 140 MPa | 20300 psi |
| Elongation at break (In 50 mm) | 52% | 52% |
| Machinability (UNS C36000 (free-cutting brass) = 100) | 40 | 40 |
| Shear modulus | 39 GPa | 5660 ksi |
| Shear strength | 270 MPa | 39200 psi |
| Poisson's ratio | 0.34 | 0.34 |
| Elastic modulus | 117 GPa | 16969 ksi |
Thermal Properties
The thermal properties of UNS C28000 brass alloys are given in the following table.
| Properties | Metric | Imperial |
|---|---|---|
| Thermal expansion co-efficient (@20-300°C/68-572°F) | 20.8 µm/m°C | 11.6 µin/in°F |
| Thermal conductivity (@20°C/68°F) | 123 W/mK | 854 BTU in/hr.ft².°F |
Other Designations
Equivalent materials UNS C28000 brass alloys are:
ASME SB111
ASTM B111
ASTM B135
Fabrication and Heat Treatment
Annealing
UNS C28000 brass alloys are annealed between 427 and 593°C (800 and 1100°F).
Cold Working
UNS C28000 brass alloys have fair cold working capacity.
Welding
Welding processes recommended for UNS C28000 brass alloys include brazing, soldering, butt welding, oxyacetylene welding, spot welding and gas shielded arc welding. Welding process not recommended for these alloys include seam welding and coated metal arc welding.
Forging
UNS C28000 brass alloys can be forged between 621 and 788°C (1150 and 1450°F). The hot forgeability rating for these alloys is 90.
Machinability
The machinability rating for UNS C28000 brass alloys is 40.
Hot Working
UNS C28000 brass alloys have excellent hot working capacity.
FAQ
| What are the mechanical properties of C28000 brass? In the annealed condition, typical properties include a tensile strength of ≥ 370 MPa, yield strength of ≥ 150 MPa, elongation of ≥ 20%, and a hardness of approximately 65 HRB. |
| What is the machinability rating of C28000 brass? C28000 brass has a fair machinability rating of around 40% on the standard scale where free-cutting brass C36000 is rated at 100%. It produces continuous chips. |
| What is C28000 brass used for? C28000 brass is widely used in architectural hardware (hinges, locks), electrical connectors, heat exchanger components, plumbing fittings, decorative trim, and various stamped parts. |
| Can C28000 brass be welded? Yes, C28000 brass can be welded and brazed using appropriate techniques and filler metals designed for copper alloys, such as silicon-bronze or brass filler rods. |
| What is the density of C28000 brass? The density of C28000 brass is approximately 8.43 grams per cubic centimeter (g/cm³), or 0.304 pounds per cubic inch (lb/in³). |
| Is C28000 brass corrosion resistant? C28000 brass offers good corrosion resistance in atmospheric, fresh water, and many mild chemical environments. However, it can be susceptible to dezincification in specific stagnant or high-chloride waters. |
Our factory
We operate a modern, specialized copper production facility equipped with advanced continuous casting and rolling lines, precision CNC machining equipment, and a rigorous quality inspection system, focusing on the manufacturing of copper tubes, plates, rods, wires, and strips. The factory is ISO9001 certified and possesses a complete industry chain capability-from raw material smelting and precision processing to finished product sorting. With an annual production capacity of tens of thousands of tons, we can flexibly handle customized orders, ensuring that our products meet international standards in dimensional accuracy, mechanical properties, and surface finish.
Copper product packaging
We implement customized packaging solutions based on product characteristics: copper tubes and rods are wrapped with moisture-resistant kraft paper, reinforced with bundling, and secured on wooden pallets or iron frame boxes to prevent deformation and damage during transit. Copper plates and strips are covered with protective film, separated by foam padding between layers, and externally secured with steel strapping along with waterproof packaging. Wires are coiled on industrial reels or vacuum-packed with plastic film. All packaging includes clear labels indicating product specifications, batch numbers, and protective symbols, ensuring safe delivery during long-distance sea and land transportation.
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