C28000 is a high-performance brass alloy that is widely used in many industrial applications due to its outstanding mechanical properties, good thermoplasticity, excellent corrosion resistance and machinability. This alloy contains copper (Cu) and zinc (Zn) as its main components, with trace amounts of lead (Pb), iron (Fe), and nickel (Ni) to enhance its properties.
Chemical composition
The chemical composition of C28000 brass usually includes:
- Copper (Cu): 59.0% - 63.0
- Zinc (Zn): remainder
- Lead (Pb): ≤ 0.09%
- Iron (Fe): ≤ 0.07%
- Nickel (Ni): ≤ 0.15
- Phosphorus (P): ≤ 0.05%
- Other impurities: ≤ 0.5%
Physical Properties
- Density: about 0.303 lb/cu in. or 8.39 g/cm³.
- Melting point: 1660°F (899°C) for liquids, 1650°F (899°C) for solids
- Electrical conductivity: 28% IACS (International Annealed Copper Standard)
- Thermal conductivity: 71 Btu/sq ft/ft hr/°F (at 68°F)
- Coefficient of thermal expansion: 11.6 x 10^-6 per °F (68 - 572°F)
Mechanical Properties
The mechanical properties of C28000 brass depend on its heat-treated condition and include:
- Tensile Strength: Ranges from 54 ksi (Soft Anneal) to 74 ksi (Hard).
- Yield Strength (YS-0.5% Ext): ranging from 21 ksi (Soft Anneal) to 55 ksi (Hard)
- Elongation: from 45% (Soft Anneal) to 10% (Hard)
- Hardness: from 40 (Rockwell B scale, Soft Anneal) to 80 (Rockwell B scale, Hard).
Machinability
C28000 brass has good machinability and can be processed and shaped by casting, forging, welding, etc. It has a moderate work hardening rate. It has a moderate work hardening rate, and the strength and hardness of the material will increase after cold working.
Corrosion resistance
C28000 brass shows good corrosion resistance in many corrosive environments, especially in seawater and salt spray environments, its corrosion resistance is especially outstanding.
Applications
C28000 brass is widely used in various industrial fields, such as:
- Electrical and electronics industry: used in the manufacture of electrical wiring, piping, decorations, furniture fittings and so on.
- Aerospace: In the aerospace field, C28000 alloy is used to manufacture high-strength, corrosion-resistant parts, such as aircraft structural parts and spacecraft components.
- Marine Engineering: Due to its excellent corrosion resistance, C28000 alloy has become an ideal material in marine engineering, and is commonly used in the manufacture of ship parts and submarine equipment.
- Chemical equipment: In the chemical industry, C28000 alloy is used to manufacture corrosion-resistant piping, valves and reactors.
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