What Forms is Brass 280 Available at Piping Mart?
Brass 280 Tubing
Brass 280 Coil
Brass 280 Foil
280 Brass Composition
UNS C82000 is an alloy composed of copper (70-75%), zinc (24-30%), lead (0.2-0.8%), and tin (0.1%). This composition creates a malleable metal with excellent machinability that can withstand high temperatures and resist wear.
|
Element
|
Percentage
|
| Residual | 0 – 0.3 |
| Fe | 0 – 0.07 |
| Cu | 59 – 63 |
| Zn | 36.3 – 41 |
| Pb | 0 – 0.3 |
280 Brass Chemical Properties
C280 has excellent dezincification and atmospheric corrosion resistance due to its high copper content. It is also resistant to hydrochloric acid at room temperature concentrations up to 5%. However, it is not recommended for use in caustic solutions or environments with sulfur compounds due to the risk of sulfide stress corrosion cracking.
280 Brass C28000 Mechanical Properties
Because of its malleability and ductility, UNS C82000 Brass can be easily formed into complex shapes without losing strength or structural integrity. It has a tensile strength of 25-35 ksi (thousand pounds per square inch) and a yield strength of 20-30 ksi, making it suitable for heavy loads or applications that require high-stress levels.
| Properties | Metric | Imperial |
|---|---|---|
| Hardness, Rockwell B | 52 | 52 |
| Tensile strength | 345 MPa | 50000 psi |
| Yield strength (@ 0.200%) | 140 MPa | 20300 psi |
| Elongation at break | 20% | 20% |
| Elastic modulus | 117 GPa | 17000 ksi |
| Poisson's ratio | 0.34 | 0.34 |
| Fatigue strength ( @ 5,000,000 cycles, rotating beam) | 125 MPa | 18100 psi |
| Machinability (UNS C36000 (free-cutting brass) = 100) | 30 | 30 |
| Shear modulus | 44 GPa | 6380 ksi |
280 Brass Physical Properties
One of the main advantages of brass C28000 is its ability to resist oxidation and wear at high temperatures. It has a melting point between 937°F – 1017°F (507°C – 550°C), depending on the alloying elements present in the material; this makes it suitable for applications involving extreme heat or friction such as bearings or gears in internal combustion engines.
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Physical Properties 280
|
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|
-H01
|
-H02
|
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|---|---|---|---|---|---|
| Density | 0.303 lb/in3 | 0.303 lb/in3 | |||
| Ultimate Tensile Strength | 56 ksi | 70.3 ksi | |||
| Yield Tensile Strength | 32 ksi | 50 ksi | |||
| Shear Strength | 35 ksi | 44.2 ksi | |||
| Shear Modulus | 5,800 ksi | 5,800 ksi | |||
| Hardness Rockwell | Brinell | B55 | 89 | B75 | 120 | |||
| Elongation at Break Percentage | 20% | 10% | |||
| Modulus of Elasticity | 15,000 ksi | 15,000 ksi | |||
| Poisson's Ratio | 0.35 | 0.35 | |||
| Machinability Percentage | 40% | 40% | |||
| Melting Point | 1,650-1,660 °F | 1,650-1,660 °F | |||
| Specific Heat | 8.96 x 10^-2 BTU/lb-°F | 8.96 x 10^-2 BTU/lb-°F | |||
| Thermal Conductivity | 854 BTU-in/hr-ft^2-°F | 854 BTU-in/hr-ft^2-°F | |||
| Electrical Conductivity | 28% IACS | 28% IACS | |||
280 Brass Thermal Properties
The thermal properties of the UNS C82000 copper alloy are tabulated below.
| Properties | Metric | Imperial |
|---|---|---|
| Thermal expansion co-efficient (@20-300°C/68-572°F) | 17.8 µm/m°C | 9.89 µin/in°F |
| Thermal conductivity (@20°C/68°F) | 218 W/mK | 1510 BTU in/hr.ft².°F |
Brass 280 Specifications
| Form | System | Standard |
| 280 Brass Bar | ASTM | B36/B36M |
| 280 Brass Plate | ASTM | B36/B36M |
| Seamless Condenser 280 Brass Tube & 280 Brass Ferrule Stock | ASME | SB111 |
| ASTM | B111/B111M | |
| 280 Brass Seamless Tube | ASME | SB135 |
| 280 Brass Sheet | ASTM | B36/B36M |
| 280 Brass Strip | ASTM | B36/B36M |
| 280 Brass Tube | ASTM | B135/B135M |
| ASTM | B135 | |
| FEDERAL | WW-T-791 |
