Yellow Brass (UNS C27000)
Yellow brass C27000, also known as alloy 270, is a type of brass alloy that primarily consists of copper and zinc. It falls under the category of alpha brasses, which are known for their good strength, corrosion resistance, and excellent formability.
| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Copper | 63.0% | 68.5% |
| Iron | —— | 0.07% |
| Lead | —— | 0.09% |
| Zinc | 31.3% | 37.0% |
The following table provides a list of yellow brass C27000 properties in both SI and US customary/Imperial units.
Click on the icon to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Density | 8470 kg/m3 |
| Mechanical Properties | Metric |
| Tensile Strength (Ultimate) | 370 to 650 MPa |
| Young’s Modulus (E) | 105 GPa |
| Shear Modulus (G) | 40 GPa |
| Elongation at Break | 48% |
| Poisson’s Ratio (ν) | 0.31 |
| Thermal Properties | Metric |
| Melting Point | 905 - 930 °C |
| Thermal Conductivity | 120 W/m·K |
| Specific Heat Capacity (Cp) | 380 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 2.0×10-5 1/°C |
| Electrical Properties | Metric |
| Electrical Conductivity | 1.57×107 S/m |
| Electrical Resistivity | 6.4×10-8 Ω·m |
The values in this table are approximate and can vary depending on various factors such as the specific manufacturing process and heat treatment applied to the alloy.
Advantages & Disadvantages of Yellow Brass C27000
| Advantages | Disadvantages |
|---|---|
| Good Corrosion Resistance | Lower Strength Compared to Other Brass Alloys |
| Excellent Cold-Working Properties | Limited Heat Resistance |
| Excellent Machinability | Not Suitable for Certain Corrosive Environments |
| High Ductility and Malleability | High Cost |
Applications of Yellow Brass C27000
Yellow Brass C27000 finds applications in various industries and sectors due to its desirable properties. Some common applications include:
- Plumbing fixtures: Yellow brass C27000 is widely used for plumbing fittings, valves, faucets, and connectors due to its corrosion resistance, ease of machining, and ability to withstand water and chemical exposure.
- Electrical components: The alloy is utilized in electrical connectors, terminals, switches, and socket contacts due to its excellent electrical conductivity and resistance to corrosion.
- Cartridge cases: Yellow brass C27000, also known as cartridge brass, is commonly used for manufacturing cartridge cases in ammunition due to its good formability, strength, and corrosion resistance.
- Heat exchangers: Yellow brass C27000’s thermal conductivity and corrosion resistance make it suitable for heat exchanger components, including tubes, headers, and shells.
- Automotive applications: The alloy is utilized in automotive components like radiator cores, fuel tanks, connectors, and fittings due to its corrosion resistance, formability, and machinability.
- Marine applications: Yellow brass C27000’s resistance to saltwater corrosion makes it suitable for marine hardware, fittings, and connectors.