C85400, commonly known as "Silicon Bronze," is a copper alloy renowned for its excellent corrosion
resistance, high strength, and good machinability. This alloy is widely used in various industries where
these properties are advantageous for performance and durability.
Chemical Composition
C85400 is primarily composed of the following elements:
| Element |
Percentage (%) |
| Copper (Cu) |
89.0 - 91.0 |
| Silicon (Si) |
2.8 - 3.8 |
| Iron (Fe) |
3.0 - 4.0 |
| Zinc (Zn) |
2.0 - 3.0 |
| Lead (Pb) |
≤ 0.05 |
| Phosphorus (P) |
≤ 0.10 |
| Others |
≤ 0.50 |
Mechanical Properties
C85400 exhibits excellent mechanical properties suitable for various applications:
| Property |
Value |
| Tensile Strength |
310 - 550 MPa |
| Yield Strength |
110 - 450 MPa |
| Elongation |
10 - 25% |
| Hardness (Rockwell B) |
70 - 90 |
| Electrical Conductivity |
7 - 12% IACS (International Annealed Copper Standard) |
| Density |
8.53 g/cm³ |
Corresponding Country's Brand
C85400 is recognized under different brands in various countries. Here are some equivalents:
| Country |
Brand Name |
| USA |
Silicon Bronze, C85400 |
| UK |
- |
| Germany |
CuSi3Fe1Mn1 |
| Japan |
C8540 |
| China |
QSi4-3 |
Common Questions and Answers
1. What are the primary applications of C85400 in industry?
Answer: C85400 Silicon Bronze is commonly used in marine environments, architectural
applications, and electrical components. It is favored for its corrosion resistance, high strength, and
aesthetic appeal.
2. Is C85400 suitable for welding?
Answer: Yes, C85400 can be welded using various welding techniques such as gas tungsten arc
welding (GTAW) and gas metal arc welding (GMAW). Preheating and post-weld heat treatment may be necessary to
prevent cracking and ensure proper joint integrity.
3. How does C85400 compare to C86300 (Manganese Bronze)?
Answer: C85400 Silicon Bronze contains silicon as a major alloying element, contributing to
its improved corrosion resistance and machinability compared to C86300 Manganese Bronze. C86300, however,
offers higher mechanical strength and wear resistance, making it suitable for bearing and heavy-load
applications.
Summary Table
| Aspect |
Details |
| Chemical Composition |
Cu (89.0-91.0%), Si (2.8-3.8%), Fe (3.0-4.0%), Zn (2.0-3.0%), Pb (≤ 0.05%), P (≤ 0.10%),
Others (≤ 0.50%)
|
| Mechanical Properties |
Tensile Strength: 310-550 MPa, Yield Strength: 110-450 MPa, Elongation: 10-25%, Hardness: 70-90
Rockwell B, Electrical Conductivity: 7-12% IACS, Density: 8.53 g/cm³
|
| Country Brands |
USA: Silicon Bronze, C85400, Germany: CuSi3Fe1Mn1, Japan: C8540, China: QSi4-3 |
| Applications |
Marine environments, architectural applications, electrical components |
C85400 Silicon Bronze is a versatile copper alloy known for its corrosion resistance, high strength, and
machinability, making it suitable for various industrial and decorative applications where these properties
are essential for performance and durability.
