C51900, also known as Bronze - Phosphor, is a copper alloy distinguished by its excellent machinability,
corrosion resistance, and wear resistance. This alloy is widely utilized in applications where these
properties are essential for performance and longevity.
Chemical Composition
C51900 is primarily composed of the following elements:
| Element |
Percentage (%) |
| Copper (Cu) |
92.0 - 96.0 |
| Tin (Sn) |
7.0 - 8.5 |
| Phosphorus (P) |
0.20 - 0.40 |
| Zinc (Zn) |
≤ 0.25 |
| Lead (Pb) |
≤ 0.05 |
| Others |
≤ 0.50 |
Mechanical Properties
C51900 exhibits excellent mechanical properties suitable for various demanding applications:
| Property |
Value |
| Tensile Strength |
380 - 620 MPa |
| Yield Strength |
180 - 550 MPa |
| Elongation |
10 - 25% |
| Hardness (Rockwell B) |
70 - 95 |
| Electrical Conductivity |
15 - 25% IACS (International Annealed Copper Standard) |
| Density |
8.83 g/cm³ |
Corresponding Country's Brand
C51900 is recognized under different brands in various countries. Here are some equivalents:
| Country |
Brand Name |
| USA |
C51900 Alloy |
| UK |
- |
| Germany |
CuSn8P |
| Japan |
C5191 |
| China |
QSn8-0.3 |
Common Questions and Answers
1. What are the primary advantages of using C51900 in engineering applications?
Answer: C51900 offers excellent machinability, corrosion resistance, and wear resistance,
making it ideal for components requiring tight tolerances and smooth surfaces. It is commonly used in
bearings, bushings, and valve components.
2. Is C51900 suitable for outdoor applications?
Answer: Yes, C51900 is well-suited for outdoor applications due to its corrosion
resistance, especially in marine environments. It retains its mechanical properties and does not corrode
easily, making it suitable for parts exposed to moisture and atmospheric conditions.
3. How does C51900 compare to other copper alloys in terms of machinability?
Answer: C51900 is known for its excellent machinability, comparable to free-cutting brass
alloys. It allows for high-speed machining operations with minimal tool wear, producing precise components
efficiently.
Summary Table
| Aspect |
Details |
| Chemical Composition |
Cu (92.0-96.0%), Sn (7.0-8.5%), P (0.20-0.40%), Zn (≤ 0.25%), Pb (≤ 0.05%), Others (≤
0.50%)
|
| Mechanical Properties |
Tensile Strength: 380-620 MPa, Yield Strength: 180-550 MPa, Elongation: 10-25%, Hardness: 70-95
Rockwell B, Electrical Conductivity: 15-25% IACS, Density: 8.83 g/cm³
|
| Country Brands |
USA: C51900 Alloy, Germany: CuSn8P, Japan: C5191, China: QSn8-0.3 |
| Applications |
Bearings, bushings, valve components, parts requiring excellent machinability and corrosion
resistance
|
C51900 Bronze - Phosphor is a versatile copper alloy known for its excellent machinability, corrosion
resistance, and wear resistance, suitable for various engineering applications where these properties are
crucial.
