Tin Bronze (UNS C90300)
Tin Bronze C90300, also known as CDA 903, is a type of copper alloy that belongs to the family of tin bronzes, which are known for their excellent strength, corrosion resistance, and wear resistance.
| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Copper | 86.0% | 89.0% |
| Aluminum | —— | 0.005% |
| Antimony | —— | 0.2% |
| Iron | —— | 0.2% |
| Lead | —— | 0.3% |
| Nickel | —— | 1.0% |
| Phosphorus | —— | 0.05% |
| Silicon | —— | 0.005% |
| Sulfur | —— | 0.05% |
| Tin | 7.5% | 9.0% |
| Zinc | 3.0% | 5.0% |
The following table provides a list of bronze C90300 properties in both SI and US customary/Imperial units.
Click on the icon to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Density | 8750 kg/m3 |
| Mechanical Properties | Metric |
| Tensile Strength (Ultimate) | 310 MPa |
| Tensile Strength (Yield) | 145 MPa |
| Young’s Modulus (E) | 97 GPa |
| Elongation at Break | 30% |
| Poisson’s Ratio (ν) | 0.34 |
| Brinell Hardness | 70 |
| Thermal Properties | Metric |
| Melting Point | 854 - 1000 °C |
| Thermal Conductivity | 74 W/m·K |
| Specific Heat Capacity (Cp) | 377 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 1.8×10-5 1/°C |
| Electrical Properties | Metric |
| Electrical Conductivity | 6.96×106 S/m |
| Electrical Resistivity | 1.44×10-7 Ω·m |
| Magnetic Permeability | 1.0 |
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 Tin Bronze C90300
| Advantages | Disadvantages |
|---|---|
| High Strength | High Cost |
| Excellent Wear Resistance | Limited Thermal Conductivity |
| Corrosion Resistance | Potential for Dezincification |
| Excellent Machinability |
Applications of Tin Bronze C90300
Tin Bronze C90300 is a versatile alloy that finds applications in various industries. Some common applications of Tin Bronze C90300 include:
- Bearings and Bushings: Tin Bronze C90300’s excellent wear resistance and high strength make it well-suited for the manufacturing of bearings and bushings. These components are used in machinery and equipment where low friction, high load-bearing capacity, and durability are essential.
- Valve Components: The corrosion resistance of Tin Bronze C90300 makes it a suitable choice for valve components in industries such as oil and gas, chemical processing, and marine. It can withstand the harsh conditions and corrosive environments often encountered in these applications.
- Gears and Worm Wheels: The strength and wear resistance of Tin Bronze C90300 make it ideal for gears and worm wheels. These components are commonly found in machinery, automotive transmissions, and mechanical power transmission systems.
- Marine Equipment: The corrosion resistance of Tin Bronze C90300, particularly in marine environments or seawater, makes it a popular choice for marine equipment components. It is used in the production of propellers, shafts, pumps, and other parts exposed to saltwater or corrosive marine atmospheres.
- Fittings and Fasteners: Tin Bronze C90300’s combination of strength and corrosion resistance makes it suitable for fittings and fasteners used in plumbing, marine, and industrial applications. It provides reliable connections and resists degradation in challenging environments.